Mesa, AZ weather in August
August in Mesa: very hot and mostly dry. Highs 105°F, lows 84°F, rain on about 5 days. This is the peak of the warm season in Mesa. Midday heat is the main thing to plan around.
- Normal high
- 105°F
- Normal low
- 84°F
- Wet days
- 5
- 1.1 in total
- Muggy days
- 5
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 106°F | 104°F |
| Normal low | 85°F | 82°F |
| Chance of a wet day | 14% | 15% |
| Sunrise / sunset | 5:40 am / 7:27 pm | 6:00 am / 6:54 pm |
| Daylight | 13.8 h | 12.9 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Arizona time (no daylight saving)).
A typical August day
- 6 am85°Fdew point 61°F
- 9 am91°Fdew point 60°F
- Noon98°Fdew point 58°F
- 3 pm103°Fdew point 56°F
- 6 pm102°Fdew point 55°F
- 9 pm96°Fdew point 57°F
NOAA hourly normals (local standard time) from Phoenix Sky Harbor Intl Airport (11 mi away); average wind 7 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 31
- Hot dayshigh 90°F or more31 of 31
- Muggy daysdaily mean dew point 65°F or more5 of 31
- Wet daysat least 0.01 in of rain or melted snow5 of 31
- Notable rainat least 0.10 in3 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 1.1 in; a dry August brings about 0.3 in and a wet one about 1.9 in (25th and 75th percentiles). About 1 day brings half an inch or more.
How August varies from year to year
- Warmest August, 1991-20202020: average high 111°F
- Coolest August2014: average high 102°F
- Wettest August1992: 3.1 in
- Driest August1996: 0.01 in
- Highest reading117°F (August 14, 2020)
- Lowest reading64°F (August 28, 2008)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 107°F | 105°F | 100°F |
| Normal low | 85°F | 84°F | 78°F |
| Wet days | 3 | 5 | 3 |
| Comfortable days | 0 | 0 | 0 |
| Daylight | 14.1 h | 13.4 h | 12.4 h |
Highs change by -2°F from July and -5°F into September.
Nearby alternatives in August
- Drier: Yuma, AZ169 mi · high 106°F · 1 wet day
- Cooler: Tucson, AZ98 mi · high 99°F · 9 wet days
How Mesa ranks in August
- Normal high5th warmest of 378 cities; 3rd of 13 in Arizona
- Wet days89th driest of 378
- Comfortable days263rd most of 341
What to pack for Mesa in August
- Light, breathable clothing – highs near 105°F and about 5 muggy days
Heating and cooling
August has 0 heating degree days and 910 cooling degree days (base 65°F), 16% of the year's total heating and cooling demand.
Questions
How hot is Mesa in August?
The normal high is 105°F and the normal low is 84°F. From 1991 to 2020 the hottest August reading was 117°F (most recently on August 14, 2020).
Does it rain a lot in Mesa in August?
About 5 days in August have at least 0.01 in of precipitation, and the normal total is 1.1 in. The wettest August in 1991-2020 was in 1992 (3.1 in); the driest was in 1996 (0.01 in).
Is August a good time to visit Mesa?
August ranks 11th of 12 months on our comfort score for Mesa (34 out of 100). It has almost no comfortable days and about 31 days at 90°F or hotter. The best months are January and February.
Where the numbers come from
- Temperature, frost dates and humidity and wind by hour: Phoenix Sky Harbor Intl Airport (USW00023183), 11 mi W of the city center, 1,107 ft (135 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Rain: Mesa (USC00025467), 0.8 mi SSE of the city center, 1,235 ft . NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Tempe ASU (USC00028499), 5.7 mi W of the city center, 1,167 ft (75 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Phoenix Sky Harbor Intl Airport (722780-23183), 11 mi W of the city center, 1,113 ft (129 ft lower than the city). Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).