Denver, Colorado weather in October

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

Average high: 69°F
Average low: 40°F
Rainy days: ~4 per month
Total precipitation: 0.8 in
Warmest recorded: 89°F
Coldest recorded: 2°F

Expect October days in Denver, Colorado to top out around 69°F and cool to about 40°F overnight, with roughly 4 days of measurable rain across the month. In recent years October has ranged from 2°F to 89°F.

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