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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Boulder's climate page.
Boulder Temperature in October
Min Temperature
4°C (39°F)
Max Temperature
18°C (64°F)
Chance of Rain
24%
Precipitation
45 mm (1.8 in)
Rainy days
7 days
Humidity
49% *
Sunshine
253 hours *
Percentage Sunshine
72% *
Best Places in the United States of America in October
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in October →
perfect weather
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What to Wear in Boulder in October
Comfortable temperatures call for an easy wardrobe in October. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Boulder in October
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Boulder's climate page.
Temperature Rainfall Sunshine Humidity
See the full Boulder climate overview or explore weather in the United States of America.
