Best year time to visit Boulder

General weather information about Boulder

Average annual temperature is 8.9 °C

Absolute maximum temperature: 35.3 °C

Absolute minimum temperature: -27.1 °C

Number of sunny days: 206

Number of rainy days: 122

Number of snow days: 37

Average annual precipitation: 602 mm

Look at detailed online map of Boulder

* Weather data for Boulder United States is based on climate observations for 2023 year

Boulder air temperature forecast for each month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Absolute maximum temperature (°C) 14.9 13 17.7 26.6 25.5 32.8 35.3 35 34.5 28.9 22 14.3
Average daytime temperature (°C) 0.8 5.7 7.6 15.4 20.6 23 29.9 28.6 25.9 18.3 11.5 6.9
Average temperature (°C) -3.8 -2.7 0 6.7 13.5 16.4 22 21 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 -2.3 -3.7
Absolute minimum temperature (°C) -25.6 -27.1 -17.9 -12.6 2 7.1 10.1 9.6 5.2 -15.2 -12 -10.4

Boulder monthly weather indicators

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daylight maximum duration (h) 10.1 11.3 12.6 13.9 14.8 15 15 14.3 13.1 11.8 10.5 9.6
Daylight mean duration (h) 9.7 10.7 12 13.3 14.4 15 14.7 13.7 12.5 11.2 10 9.4
Daylight minimum duration (h) 9.4 10.2 11.3 12.7 13.9 14.8 14.3 13.1 11.8 10.5 9.6 9.3
Sunshine mean duration (h) 6.7 8.5 9.7 10.5 10.5 11.1 13.1 11.5 10.9 9.2 8.2 6.9
Precipitation (mm) 31 25 37 52 144 126 36 54 32 24 23 21
Sunny days 17 21 15 16 5 9 17 17 21 23 23 22
Rainy days 1 2 11 10 26 21 14 14 9 6 5 3
Snow days 13 5 5 4 2 2 6

Boulder - weather forecast by months

January February March April May June July August September October November December

Best time to visit Boulder:

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

  • July — 13.1(h)

The largest precipitation sum in Boulder is at

  • May — 144(mm)
  • June — 126(mm)

Weather forecast in the closest to Boulder admin centers