Best year time to visit Keystone

General weather information about Keystone

Average annual temperature is 11.9 °C

Absolute maximum temperature: 42.2 °C

Absolute minimum temperature: -14.1 °C

Number of sunny days: 252 days

Number of rainy days: 95 days

Number of snow days: 18 days

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

Keystone air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)6.010.615.329.733.734.538.142.232.224.912.58.7
Average daytime temperature (°C)2.04.49.915.427.428.733.733.625.717.07.44.7
Average temperature (°C)-0.60.44.39.619.921.525.825.818.911.23.32.0
Average night temperature (°C)-3.4-2.5-0.54.212.914.318.018.412.96.30.4-0.1
Absolute minimum temperature (°C)-14.1-11.0-5.2-2.26.67.813.112.64.1-5.1-3.9-3.7

Keystone monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.010.012.014.015.016.016.015.013.011.09.08.0
Daylight mean duration (h)8.810.211.913.715.216.115.714.312.610.89.28.4
Daylight minimum duration (h)8.09.011.012.014.015.015.013.011.09.08.08.0
Sunshine mean duration (h)4.36.28.59.312.813.113.312.010.08.05.43.5
Precipitation (mm)63132235322461124223764
Sunny days141821182123292725212114
Rainy days13571110724510912
Snow days453100000005

Keystone - weather forecast by months

Keystone weather in januaryKeystone weather in februaryKeystone weather in marchKeystone weather in aprilKeystone weather in mayKeystone weather in juneKeystone weather in julyKeystone weather in augustKeystone weather in septemberKeystone weather in octoberKeystone weather in novemberKeystone weather in december

Best time to visit Keystone:

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

  • May — 12.8(h)
  • June — 13.1(h)
  • July — 13.3(h)
  • August — 12.0(h)

Months with the longest average daylight duration in Keystone:

  • June — 16.1(h)
  • July — 15.7(h)

The largest precipitation sum in Keystone is at

  • January — 63(mm)
  • December — 64(mm)

    • Weather forecast in the closest to Keystone admin centers

    Weather forecast in the closest towns to Keystone

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    Frequently asked questions

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