Weather in Spearfish in May

General weather information about Spearfish

Average annual temperature is 9.3 °C

Absolute maximum temperature: 35.6 °C

Absolute minimum temperature: -31.4 °C

Number of sunny days: 203 days

Number of rainy days: 114 days

Number of snow days: 48 days

Look at detailed online map of Spearfish

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

Spearfish air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)13.915.016.825.727.629.334.635.632.724.020.020.6
Average daytime temperature (°C)2.94.24.411.921.023.928.127.924.213.811.06.5
Average temperature (°C)-1.1-1.5-1.85.415.118.321.621.617.58.25.51.8
Average night temperature (°C)-4.4-6.4-6.50.19.412.815.016.011.83.80.9-1.6
Absolute minimum temperature (°C)-21.0-31.4-14.2-9.10.08.67.811.17.6-9.3-9.9-9.0

Spearfish monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.014.015.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.310.411.913.514.815.515.214.012.511.09.68.9
Daylight minimum duration (h)8.09.011.012.014.015.014.013.011.010.09.08.0
Sunshine mean duration (h)5.47.58.410.111.311.213.411.110.88.37.66.2
Precipitation (mm)39443247129103175810035732
Sunny days16151316138191918182622
Rainy days653618221212121026
Snow days9815800000323

Spearfish - weather forecast by months

Spearfish weather in januarySpearfish weather in februarySpearfish weather in marchSpearfish weather in aprilSpearfish weather in maySpearfish weather in juneSpearfish weather in julySpearfish weather in augustSpearfish weather in septemberSpearfish weather in octoberSpearfish weather in novemberSpearfish weather in december

Best time to visit Spearfish:

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

  • July — 13.4(h)

Months with the longest average daylight duration in Spearfish:

  • June — 15.5(h)

The largest precipitation sum in Spearfish is at

  • May — 129(mm)
  • June — 103(mm)
  • September — 100(mm)

    • Weather forecast in the closest to Spearfish admin centers

    Weather forecast in the closest towns to Spearfish

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    Frequently asked questions

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