Best year time to visit City of Helena

General weather information about City of Helena

Average annual temperature is 7.2 °C

Absolute maximum temperature: 35.8 °C

Absolute minimum temperature: -28.4 °C

Number of sunny days: 205 days

Number of rainy days: 110 days

Number of snow days: 50 days

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

City of Helena air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)9.110.511.023.828.230.334.835.830.322.816.014.8
Average daytime temperature (°C)1.03.23.111.121.721.929.928.822.413.08.04.6
Average temperature (°C)-4.4-3.7-3.53.514.215.421.620.314.56.11.6-0.6
Average night temperature (°C)-8.9-8.7-8.2-2.67.29.212.713.48.01.3-2.9-4.1
Absolute minimum temperature (°C)-28.4-27.2-14.4-11.60.61.47.39.82.3-15.2-9.0-11.1

City of Helena monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.014.015.015.015.014.013.011.010.08.0
Daylight mean duration (h)9.110.311.913.615.015.815.414.212.610.99.48.6
Daylight minimum duration (h)8.09.011.012.014.015.014.013.011.010.08.08.0
Sunshine mean duration (h)5.36.38.09.811.711.513.811.210.17.46.75.6
Precipitation (mm)2211404539432445539149
Sunny days17171412910232319192121
Rainy days23210222088111095
Snow days12815800000205

City of Helena - weather forecast by months

City of Helena weather in januaryCity of Helena weather in februaryCity of Helena weather in marchCity of Helena weather in aprilCity of Helena weather in mayCity of Helena weather in juneCity of Helena weather in julyCity of Helena weather in augustCity of Helena weather in septemberCity of Helena weather in octoberCity of Helena weather in novemberCity of Helena weather in december

Best time to visit City of Helena:

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

  • May — 11.7(h)
  • June — 11.5(h)
  • July — 13.8(h)

Months with the longest average daylight duration in City of Helena:

  • June — 15.8(h)
  • July — 15.4(h)

The largest precipitation sum in City of Helena is at

  • March — 40(mm)
  • April — 45(mm)
  • May — 39(mm)
  • June — 43(mm)
  • August — 44(mm)
  • September — 55(mm)
  • October — 39(mm)

    • Weather forecast in the closest to City of Helena admin centers

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    Frequently asked questions

    When is the best time to visit City of Helena?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit City of Helena.
    What is the weather like in City of Helena?
    See average temperature, rainfall and daylight hours for City of Helena by month in the table above.
    How many sunny days does City of Helena have?
    The monthly weather statistics above show sunshine and rainfall patterns for City of Helena throughout the year.