Best year time to visit City of Boulder

General weather information about City of Boulder

Average annual temperature is 8.8 °C

Absolute maximum temperature: 35.3 °C

Absolute minimum temperature: -27.1 °C

Number of sunny days: 206 days

Number of rainy days: 122 days

Number of snow days: 37 days

* Weather data for City of Boulder United States is based on climate observations for 2026 year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	14.9	13.0	17.7	26.6	25.5	32.8	35.3	35.0	34.5	28.9	22.0	14.3
Average daytime temperature (°C)	0.8	5.7	7.6	15.4	20.6	23.0	29.9	28.6	25.9	18.3	11.5	6.9
Average temperature (°C)	-3.7	-2.6	0.0	6.5	13.5	16.4	22.0	21.0	17.3	10.2	3.4	0.6
Average night temperature (°C)	-8.2	-9.3	-5.9	-0.6	7.2	10.6	14.6	14.4	10.3	3.8	-2.2	-3.7
Absolute minimum temperature (°C)	-25.6	-27.1	-17.9	-12.6	2.0	7.1	10.1	9.6	5.2	-15.2	-12.0	-10.4

The best time to visit City of Boulder during the most sunny months:

The largest precipitation sum in City of Boulder is at

May — 143(mm)

June — 126(mm)

When is the best time to visit City of Boulder?

The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit City of Boulder.

What is the weather like in City of Boulder?

See average temperature, rainfall and daylight hours for City of Boulder by month in the table above.

How many sunny days does City of Boulder have?

The monthly weather statistics above show sunshine and rainfall patterns for City of Boulder throughout the year.