Weather in Rapid City in May

General weather information about Rapid City

Average annual temperature is 4.1 °C

Absolute maximum temperature: 30.6 °C

Absolute minimum temperature: -31.0 °C

Number of sunny days: 196 days

Number of rainy days: 121 days

Number of snow days: 48 days

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* Weather data for Rapid City Canada is based on climate observations for 2026 year

Rapid City air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)-0.53.00.717.327.930.630.228.930.117.96.26.8
Average daytime temperature (°C)-8.3-7.3-5.25.321.625.023.324.021.38.80.7-1.1
Average temperature (°C)-11.7-12.9-10.70.314.419.617.618.415.65.3-2.7-4.8
Average night temperature (°C)-14.4-17.7-15.4-3.98.414.612.614.111.12.3-5.6-7.9
Absolute minimum temperature (°C)-29.7-31.0-21.5-13.4-2.19.87.610.14.4-13.4-16.2-14.5

Rapid City monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.010.012.014.016.016.016.015.013.011.09.08.0
Daylight mean duration (h)8.610.111.913.815.416.315.914.412.610.79.18.2
Daylight minimum duration (h)8.09.010.012.014.016.015.013.011.09.08.08.0
Sunshine mean duration (h)3.17.08.98.711.413.112.910.29.35.25.35.6
Precipitation (mm)1279425480495542582724
Sunny days24152416157141314151722
Rainy days101816231718161263
Snow days6136600000476

Rapid City - weather forecast by months

Rapid City weather in januaryRapid City weather in februaryRapid City weather in marchRapid City weather in aprilRapid City weather in mayRapid City weather in juneRapid City weather in julyRapid City weather in augustRapid City weather in septemberRapid City weather in octoberRapid City weather in novemberRapid City weather in december

Best time to visit Rapid City:

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

  • May — 11.4(h)
  • June — 13.1(h)
  • July — 12.9(h)

Months with the longest average daylight duration in Rapid City:

  • May — 15.4(h)
  • June — 16.3(h)
  • July — 15.9(h)

The largest precipitation sum in Rapid City is at

  • May — 54(mm)
  • June — 80(mm)
  • July — 49(mm)
  • August — 55(mm)
  • October — 58(mm)

    • Weather forecast in the closest to Rapid City admin centers

    Weather forecast in the closest towns to Rapid City

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    Frequently asked questions

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