Tucson, Arizona weather in September

Averages from 2021–2025 (150 days of record).

Average high: 96°F
Average low: 72°F
Rainy days: ~5 per month
Total precipitation: 1.7 in
Warmest recorded: 110°F
Coldest recorded: 63°F

Expect September days in Tucson, Arizona to top out around 96°F and cool to about 72°F overnight, with roughly 5 days of measurable rain across the month. In recent years September has ranged from 63°F to 110°F.

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Current Tucson, Arizona forecast → · Historical data by Open-Meteo (ERA5).