Denver, Colorado weather in January

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

Average high: 38°F
Average low: 14°F
Rainy days: ~5 per month
Total precipitation: 0.8 in
Warmest recorded: 61°F
Coldest recorded: -34°F

Expect January days in Denver, Colorado to top out around 38°F and cool to about 14°F overnight, with roughly 5 days of measurable rain across the month. In recent years January has ranged from -34°F to 61°F.

Other months

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Current Denver, Colorado forecast → · Historical data by Open-Meteo (ERA5).