Temperatures august: August Daily Temperature Records And Averages

Daily high temperatures decrease by 3°F, from 105°F to 103°F, rarely falling below 97°F or exceeding 111°F.

Daily low temperatures decrease by 3°F, from 85°F to 82°F, rarely falling below 75°F or exceeding 90°F.

For reference, on July 5, the hottest day of the year, temperatures in Phoenix typically range from 84°F to 107°F, while on December 28, the coldest day of the year, they range from 45°F to 65°F.

Average High and Low Temperature in August in PhoenixAug112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313165°F65°F70°F70°F75°F75°F80°F80°F85°F85°F90°F90°F95°F95°F100°F100°F105°F105°F110°F110°F115°F115°FJulSepAug 1105°FAug 1105°F85°F85°FAug 31103°FAug 31103°F82°F82°FAug 11105°FAug 11105°F84°F84°FAug 21104°FAug 21104°F83°F83°F

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on August. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in August in Phoenix

Average Hourly Temperature in August in PhoenixAug112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMJulSepwarmwarmwarmhotswelteringcomfortable

frigid
15°F
freezing
32°F
very cold
45°F
cold
55°F
cool
65°F
comfortable
75°F
warm
85°F
hot
95°F
sweltering

The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Ouargla, Algeria (6,361 miles away) is the far-away foreign place with temperatures most similar to Phoenix (view comparison).

© OpenStreetMap contributors

Compare Phoenix to another city:

Map

The month of August in Phoenix experiences rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 35% to 21%.

The clearest day of the month is August 31, with clear, mostly clear, or partly cloudy conditions 79% of the time.

For reference, on February 19, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 38%, while on June 14, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 86%.

Cloud Cover Categories in August in Phoenix

Cloud Cover Categories in August in PhoenixAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JulSepAug 165%Aug 165%Aug 3179%Aug 3179%Aug 1166%Aug 1166%Aug 2173%Aug 2173%clearmostly clearpartly cloudymostly cloudyovercast

0%
clear
20%
mostly clear
40%
partly cloudy
60%
mostly cloudy
80%
overcast
100%

The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Phoenix, the chance of a wet day over the course of August is gradually decreasing, starting the month at 19% and ending it at 16%.

For reference, the year’s highest daily chance of a wet day is 19% on August 13, and its lowest chance is 1% on June 14.

Probability of Precipitation in August in Phoenix

Probability of Precipitation in August in PhoenixAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%2%2%4%4%6%6%8%8%10%10%12%12%14%14%16%16%18%18%20%20%JulSepAug 419%Aug 419%Aug 3116%Aug 3116%Aug 2119%Aug 2119%rain

The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during August in Phoenix is essentially constant, remaining about 0.9 inches throughout, and rarely exceeding 1.8 inches or falling below 0.2 inches.

The highest average 31-day accumulation is 1.0 inches on August 14.

Average Monthly Rainfall in August in Phoenix

Average Monthly Rainfall in August in PhoenixAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 inJulSepAug 141.0 inAug 141.0 inAug 10.9 inAug 10.9 inAug 310.9 inAug 310.9 in

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.

Over the course of August in Phoenix, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 54 minutes, implying an average daily decrease of 1 minute, 48 seconds, and weekly decrease of 12 minutes, 35 seconds.

The shortest day of the month is August 31, with 12 hours, 53 minutes of daylight and the longest day is August 1, with 13 hours, 47 minutes of daylight.

Hours of Daylight and Twilight in August in Phoenix

Hours of Daylight and Twilight in August in PhoenixAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrJulSepnightnightdaydayAug 113 hr, 47 minAug 113 hr, 47 minAug 3112 hr, 53 minAug 3112 hr, 53 min

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the month in Phoenix is 5:40 AM on August 1 and the latest sunrise is 21 minutes later at 6:01 AM on August 31.

The latest sunset is 7:28 PM on August 1 and the earliest sunset is 33 minutes earlier at 6:55 PM on August 31.

Daylight saving time is not observed in Phoenix during 2023.

For reference, on June 21, the longest day of the year, the Sun rises at 5:18 AM and sets 14 hours, 22 minutes later, at 7:41 PM, while on December 22, the shortest day of the year, it rises at 7:28 AM and sets 9 hours, 56 minutes later, at 5:24 PM.

Sunrise & Sunset with Twilight in August in Phoenix

Sunrise & Sunset with Twilight in August in PhoenixAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031312 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJulSep5:40 AM5:40 AMAug 17:28 PMAug 17:28 PM6:01 AM6:01 AMAug 316:55 PMAug 316:55 PM5:51 AM5:51 AMAug 167:13 PMAug 167:13 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset

The solar day over the course of August. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

The figure below presents a compact representation of the sun’s elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in August in Phoenix

Solar Elevation and Azimuth in August in PhoenixAug112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMJulSep001010202020303040405050506060700001010202030303040405050606070

northeastsouthwest

Solar elevation and azimuth over the course of August 2023. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for August 2023. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in August in Phoenix

Moon Rise, Set & Phases in August in PhoenixAug112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMJulSepJul 34:39 AMJul 34:39 AMJul 1711:32 AMJul 1711:32 AMAug 111:32 AMAug 111:32 AMAug 162:39 AMAug 162:39 AMAug 306:36 PMAug 306:36 PMSep 146:40 PMSep 146:40 PMSep 292:58 AMSep 292:58 AM7:32 PM7:32 PM5:14 AM5:14 AM5:08 AM5:08 AM8:08 PM8:08 PM7:11 PM7:11 PM5:17 AM5:17 AM5:56 AM5:56 AM7:48 PM7:48 PM7:08 PM7:08 PM6:36 AM6:36 AM5:43 AM5:43 AM6:43 PM6:43 PM6:08 PM6:08 PM6:33 AM6:33 AM

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Phoenix is gradually decreasing during August, falling from 23% to 19% over the course of the month.

The highest chance of a muggy day during August is 24% on August 14.

For reference, on August 14, the muggiest day of the year, there are muggy conditions 24% of the time, while on November 4, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in August in Phoenix

Humidity Comfort Levels in August in PhoenixAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%JulSepAug 1424%Aug 1424%Aug 123%Aug 123%Aug 3119%Aug 3119%muggymuggyhumidhumidcomfortablecomfortabledrydryoppressiveoppressive

dry
55°F
comfortable
60°F
humid
65°F
muggy
70°F
oppressive
75°F
miserable

The percentage of time spent at various humidity comfort levels, categorized by dew point.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Phoenix is essentially constant during August, remaining within 0.1 miles per hour of 5.8 miles per hour throughout.

For reference, on April 30, the windiest day of the year, the daily average wind speed is 7.5 miles per hour, while on August 16, the calmest day of the year, the daily average wind speed is 5.7 miles per hour.

The lowest daily average wind speed during August is 5.7 miles per hour on August 16.

Average Wind Speed in August in Phoenix

Average Wind Speed in August in PhoenixAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 mph0 mph3 mph3 mph5 mph5 mph6 mph6 mph8 mph8 mph20 mph20 mphJulSepAug 165. 7 mphAug 165.7 mphAug 16.0 mphAug 16.0 mphAug 315.8 mphAug 315.8 mph

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction in Phoenix throughout August is predominantly from the west, with a peak proportion of 46% on August 1.

Wind Direction in August in Phoenix

Wind Direction in August in PhoenixWEAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%JulSepwestsoutheastnorth

northeastsouthwest

The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Temperatures in Phoenix are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

Time Spent in Various Temperature Bands and the Growing Season in August in Phoenix

Time Spent in Various Temperature Bands and the Growing Season in August in Phoenixgrowing seasonAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JulSep100%Aug 16100%Aug 16Jul 21100%Jul 21100%warmhotswelteringcomfortable

frigid
15°F
freezing
32°F
very cold
45°F
cold
55°F
cool
65°F
comfortable
75°F
warm
85°F
hot
95°F
sweltering

The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Phoenix are very rapidly increasing during August, increasing by 1,055°F, from 4,705°F to 5,760°F, over the course of the month.

Growing Degree Days in August in Phoenix

Growing Degree Days in August in PhoenixAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031314,600°F4,600°F4,800°F4,800°F5,000°F5,000°F5,200°F5,200°F5,400°F5,400°F5,600°F5,600°F5,800°F5,800°F6,000°F6,000°FJulSepAug 14,705°FAug 14,705°FAug 315,760°FAug 315,760°FAug 115,058°FAug 115,058°FAug 215,411°FAug 215,411°F

The average growing degree days accumulated over the course of August, with 25th to 75th and 10th to 90th percentile bands.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Phoenix is essentially constant during August, remaining within 0.2 kWh of 6.8 kWh throughout.

Average Daily Incident Shortwave Solar Energy in August in Phoenix

Average Daily Incident Shortwave Solar Energy in August in PhoenixAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 kWh0 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJulSepAug 17.0 kWhAug 17.0 kWhAug 316.5 kWhAug 316.5 kWhAug 166.8 kWhAug 166.8 kWh

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

For the purposes of this report, the geographical coordinates of Phoenix are 33.448 deg latitude, -112.074 deg longitude, and 1,083 ft elevation.

The topography within 2 miles of Phoenix is essentially flat, with a maximum elevation change of 56 feet and an average elevation above sea level of 1,082 feet. Within 10 miles is essentially flat (1,722 feet). Within 50 miles contains very significant variations in elevation (6,909 feet).

The area within 2 miles of Phoenix is covered by artificial surfaces (52%) and shrubs (48%), within 10 miles by artificial surfaces (51%) and shrubs (44%), and within 50 miles by shrubs (85%).

This report illustrates the typical weather in Phoenix, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Phoenix.

For each station, the records are corrected for the elevation difference between that station and Phoenix according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Phoenix is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Phoenix and a given station.

The stations contributing to this reconstruction are:

• Phoenix Sky Harbor International Airport (KPHX, 74%, 4 mi, east, 23 ft elevation change)
• Phoenix-Deer Valley Airport (KDVT, 9%, 17 mi, north, 371 ft elevation change)
• Phoenix Goodyear Airport (KGYR, 9%, 18 mi, west, -115 ft elevation change)
• Luke Air Force Base (KLUF, 8%, 18 mi, northwest, 0 ft elevation change)

KPHX, 74%4 mi, 23 ftKDVT, 9%17 mi, 371 ftKGYR, 9%18 mi, -115 ftKLUF, 8%18 mi, 0 ft

© OpenStreetMap contributors

To get a sense of how much these sources agree with each other, you can view a comparison of Phoenix and the stations that contribute to our estimates of its temperature history and climate. Please note that each source’s contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

Other Data

All data relating to the Sun’s position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA’s MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA’s Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

Please review our full terms contained on our Terms of Service page.

Phoenix

Maricopa County, Arizona, United States

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territory of Russia will be warmer than usual. This was told to Rossiyskaya Gazeta by the head of the laboratory of the Hydrometeorological Center of Russia, Lyudmila Parshina.

Evgeniy Biyatov/RIA Novosti

In the central regions, it will be mostly plus 10-15 degrees at night, and 20-26 degrees during the day. Although there may be hot days with temperatures above 30 degrees.

In the Moscow region, August is predicted to be 2 degrees warmer than usual. At night, it is mostly 12-17 degrees, and in the daytime the air will warm up to 22-27 degrees. With cold snaps, night temperatures can drop to plus 7 degrees, and daytime temperatures can drop to plus 13 degrees.

It will be warm in the Volga region, where the temperature is also expected to be 2 degrees above the climatic norm. During the day it is expected to be within 23-28 degrees, at night – plus 12-17 degrees.

It will be moderately hot in the south – 28-33 degrees. At night – from 17 to 22 degrees.

In the Urals, August also promises to be warm. In the south of the Urals district – in the Sverdlovsk, Chelyabinsk, Kurgan regions and in the south of the Tyumen region during the day it is mostly plus 20-25 degrees. In the autonomous districts of Siberia – in the Khanty-Mansiysk and Yamalo-Nenets districts – in the daytime from 16 to 21 degrees, which is also quite warm for these regions. Although on some days cooling is possible during the day up to 7-12 degrees Celsius. And nighttime temperatures can drop to zero degrees.

In Southern Siberia, in Transbaikalia, in the Far East the weather will also be relatively warm. Thus, the prevailing temperature in Southern Siberia is 20-25 degrees during the day. But cold air flows can already penetrate to the north of the Krasnoyarsk Territory, so night frosts of up to minus 1 degree are possible. And in the afternoon it is predicted not higher than 6-11 degrees.

In the south of the Far East – in the Amur Region, Khabarovsk Territory, in Primorye in the daytime 21-26 degrees.

A lot of rain is expected in the north-west of the European territory – in the Leningrad, Pskov and Novgorod regions. Frequent rains are predicted in the north of the Murmansk region, in the Nenets district. In the south of the Trans-Baikal Territory and the south of Primorye, August is also expected to be rainy.

But the lack of precipitation is possible in the southern regions of the Central District – from Tula to Kursk, in the Krasnodar Territory, in the Volga region.