Boulder Weather in October

October in Boulder sees daytime temperatures around 18°C (64°F) and lows of 4°C (39°F) at night. Pack a rain jacket because some rainfall is likely.

Rainfall in Boulder in October

Typically, you can expect about 7 days of rain this month, with 45 mm (1.8 in) on average. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.

Temperature in Boulder in October

Expect highs of 18°C (64°F) in Boulder in October, with nights dropping to around 4°C (39°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. With overnight lows of 4°C (39°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Boulder in October

The city usually sees around 253 hours of sunlight, indicating many sunny days , a great month for sightseeing.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, June and September typically offer the best weather for Boulder.