Tucson, AZ weather in August
Tucson is very hot in August, with some rain: highs average 99°F and nights drop to about 75°F. There are about 9 days with rain. Midday heat is the main thing to plan around.
- Normal high
- 99°F
- Normal low
- 75°F
- Wet days
- 9
- 2.0 in total
- Muggy days
- 4
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 99°F | 98°F |
| Normal low | 76°F | 74°F |
| Chance of a wet day | 29% | 24% |
| Sunrise / sunset | 5:38 am / 7:21 pm | 5:58 am / 6:49 pm |
| Daylight | 13.7 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 am75°Fdew point 61°F
- 9 am85°Fdew point 60°F
- Noon93°Fdew point 57°F
- 3 pm96°Fdew point 55°F
- 6 pm92°Fdew point 56°F
- 9 pm85°Fdew point 59°F
NOAA hourly normals (local standard time) from Davis Monthan AFB (5 mi away); average wind 7 mph; clear or few clouds in 62% of daytime hours, mostly cloudy or overcast in 25%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 31
- Hot dayshigh 90°F or more29 of 31
- Muggy daysdaily mean dew point 65°F or more4 of 31
- Wet daysat least 0.01 in of rain or melted snow9 of 31
- Notable rainat least 0.10 in4 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 2.0 in; a dry August brings about 1.2 in and a wet one about 2.3 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 105°F
- Coolest August2006: average high 94°F
- Wettest August1993: 4.9 in
- Driest August2009: 0.3 in
- Highest reading112°F (August 1, 1993)
- Lowest reading63°F (August 30, 1992)
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 | 100°F | 99°F | 95°F |
| Normal low | 76°F | 75°F | 70°F |
| Wet days | 9 | 9 | 4 |
| Comfortable days | 0 | 0 | 0 |
| Daylight | 14.0 h | 13.3 h | 12.4 h |
Highs change by -1°F from July and -4°F into September.
Nearby alternatives in August
- Warmer: San Tan Valley, AZ76 mi · high 105°F · 5 wet days
- Drier: San Tan Valley, AZ76 mi · high 105°F · 5 wet days
- Cooler: Flagstaff, AZ210 mi · high 79°F · 13 wet days
How Tucson ranks in August
- Normal high16th warmest of 378 cities; 9th of 13 in Arizona
- Wet days174th driest of 378
- Comfortable days267th most of 341
What to pack for Tucson in August
- Light, breathable clothing – highs near 99°F and about 4 muggy days
- A rain jacket or umbrella – rain on about 9 days
Heating and cooling
August has 0 heating degree days and 679 cooling degree days (base 65°F), 14% of the year's total heating and cooling demand.
Questions
How hot is Tucson in August?
The normal high is 99°F and the normal low is 75°F. From 1991 to 2020 the hottest August reading was 112°F (August 1, 1993).
Does it rain a lot in Tucson in August?
About 9 days in August have at least 0.01 in of precipitation, and the normal total is 2.0 in. The wettest August in 1991-2020 was in 1993 (4.9 in); the driest was in 2009 (0.3 in).
Is August a good time to visit Tucson?
August ranks 12th of 12 months on our comfort score for Tucson (33 out of 100). It has almost no comfortable days and about 29 days at 90°F or hotter. The best months are January, February and March.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Tucson Intl Airport (USW00023160), 6.5 mi SSW of the city center, 2,549 ft (68 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Davis Monthan AFB (USW00023109), 4.6 mi SSE of the city center, 2,654 ft (173 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Tucson International Airport (722740-23160), 6.4 mi SSW of the city center, 2,551 ft (70 ft higher than the city). Hourly observations, 1991-2020.