Best year time to visit Helena

General weather information about Helena

Average annual temperature is 18.3 °C

Absolute maximum temperature: 37 °C

Absolute minimum temperature: -3.2 °C

Number of sunny days: 192

Number of rainy days: 173

Number of snow days:

Average annual precipitation: 1294 mm

Look at detailed online map of Helena

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

Helena air temperature forecast for each month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Absolute maximum temperature (°C) 21.8 24.2 25.6 27.6 30.8 36.7 35.4 37 32.5 31.2 26.3 20.4
Average daytime temperature (°C) 13.8 15.9 17.9 22.1 27.7 31.7 32.5 32.8 29.5 24.3 17.3 14
Average temperature (°C) 9.6 10.7 13 16.4 22.3 26.3 27.8 27.9 24.5 19.4 12.4 9.2
Average night temperature (°C) 6.2 7 9.1 12.2 17.7 21.8 24.1 24 20.5 15.6 8.5 5.6
Absolute minimum temperature (°C) -1.9 -3.2 -2.2 6.8 9.4 18.8 21.6 19.3 16.9 3 0.7 0.3

Helena monthly weather indicators

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daylight maximum duration (h) 10.5 11.4 12.5 13.5 14.3 14.5 14.4 13.9 12.9 11.8 10.8 10
Daylight mean duration (h) 10.1 11 12 13.1 14 14.4 14.2 13.4 12.4 11.3 10.4 9.9
Daylight minimum duration (h) 9.9 10.5 11.4 12.6 13.6 14.3 13.9 12.9 11.9 10.8 10 9.8
Sunshine mean duration (h) 6.7 6.8 7.7 8.5 11.2 12.3 11.4 10.7 10.8 8.3 7.6 7.2
Precipitation (mm) 163 115 211 213 41 91 110 115 29 64 90 52
Sunny days 14 15 13 12 14 11 12 16 19 23 21 22
Rainy days 17 13 18 18 17 19 19 15 11 8 9 9

Helena - weather forecast by months

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

Best time to visit Helena:

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

  • June — 12.3(h)

The largest precipitation sum in Helena is at

  • January — 163(mm)
  • March — 211(mm)
  • April — 213(mm)

Weather forecast in the closest to Helena admin centers