Best year time to visit Grassy Butte

General weather information about Grassy Butte

Average annual temperature is 6.4 °C

Absolute maximum temperature: 35.3 °C

Absolute minimum temperature: -30.8 °C

Number of sunny days: 217 days

Number of rainy days: 99 days

Number of snow days: 49 days

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* Weather data for Grassy Butte United States is based on climate observations for 2026 year

Grassy Butte air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)2.75.12.925.628.230.935.333.233.122.511.711.9
Average daytime temperature (°C)-3.5-2.4-4.78.421.426.027.127.523.310.95.23.1
Average temperature (°C)-7.7-7.6-9.02.114.920.020.720.816.85.70.4-1.7
Average night temperature (°C)-10.4-11.8-12.4-2.69.214.514.915.111.82.0-3.2-4.6
Absolute minimum temperature (°C)-26.5-30.8-23.0-15.00.59.87.410.47.6-18.6-13.8-13.5

Grassy Butte monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.010.012.014.015.015.015.014.013.011.010.08.0
Daylight mean duration (h)9.010.311.913.615.115.915.514.212.610.99.38.5
Daylight minimum duration (h)8.09.011.012.014.015.014.013.011.010.08.08.0
Sunshine mean duration (h)4.37.57.49.511.412.513.311.210.06.77.36.0
Precipitation (mm)12163629575424443848418
Sunny days211716151315221918152323
Rainy days41091815912121333
Snow days61015600000345

Grassy Butte - weather forecast by months

Grassy Butte weather in januaryGrassy Butte weather in februaryGrassy Butte weather in marchGrassy Butte weather in aprilGrassy Butte weather in mayGrassy Butte weather in juneGrassy Butte weather in julyGrassy Butte weather in augustGrassy Butte weather in septemberGrassy Butte weather in octoberGrassy Butte weather in novemberGrassy Butte weather in december

Best time to visit Grassy Butte:

The best time to visit Grassy Butte during the most sunny months:

  • May — 11.4(h)
  • June — 12.5(h)
  • July — 13.3(h)
  • August — 11.2(h)

Months with the longest average daylight duration in Grassy Butte:

  • June — 15.9(h)
  • July — 15.5(h)

The largest precipitation sum in Grassy Butte is at

  • May — 57(mm)
  • June — 54(mm)
  • August — 44(mm)
  • October — 48(mm)

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    Frequently asked questions

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