Tucson, Arizona weather in August

Averages from 2021–2025 (155 days of record).

Average high

98°F

Average low

77°F

Rainy days

~6 per month

Total precipitation

2.0 in

Warmest recorded

114°F

Coldest recorded

68°F

Expect August days in Tucson, Arizona to top out around 98°F and cool to about 77°F overnight, with roughly 6 days of measurable rain across the month. In recent years August has ranged from 68°F to 114°F.