Tucson, Arizona weather in December

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

Average high: 69°F
Average low: 45°F
Rainy days: ~5 per month
Total precipitation: 1.5 in
Warmest recorded: 83°F
Coldest recorded: 30°F

Expect December days in Tucson, Arizona to top out around 69°F and cool to about 45°F overnight, with roughly 5 days of measurable rain across the month. In recent years December has ranged from 30°F to 83°F.

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