Tucson, Arizona weather in January

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

Average high

63°F

Average low

39°F

Rainy days

~6 per month

Total precipitation

1.8 in

Warmest recorded

81°F

Coldest recorded

26°F

Expect January days in Tucson, Arizona to top out around 63°F and cool to about 39°F overnight, with roughly 6 days of measurable rain across the month. In recent years January has ranged from 26°F to 81°F.