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Keystone
Weather averages
ClimateForecastAprilMay >>

Climate in Keystone (South Dakota), United States of America

The graphs below show the monthly weather averages over the year.

Average day and night temperature

The mean minimum and maximum temperatures over the year.

Monthly precipitation

The mean monthly precipitation over the year, including rain, snow, hail etc.

Monthly rainy days

The average number of days each month with rain, snow, hail etc.

Weather Forecasts for Keystone (SD)

Tue   Apr 30
12°C | 3°C
NW 22 km/h
1.4 mm
partly cloudy and small chance of rain

partly cloudy and small chance of rain

hourly forecast
Wed   May 01
13°C | 2°C
S 25 km/h
5.4 mm
overcast and chance of rain

overcast and chance of rain

hourly forecast
Thu   May 02
9°C | 1°C
NW 14 km/h
5.6 mm
broken clouds and thunder

broken clouds and thunder

hourly forecast
5-Day Forecast 10-Day Forecast

The best time of year to visit Keystone in the United States of America

During the months of June and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:

  • Does Keystone have a dry season?
    Yes, the months of January, February, November and December are very dry.
  • Which is the warmest month in Keystone?
    July has an average maximum temperature of 28°C and is the warmest month of the year.
  • Which is the coldest month in Keystone?
    The coldest month is February with an average maximum temperature of 3°C.
  • Which is the wettest month in Keystone?
    May tops the wettest month list with 114 mm of rainfall.
  • Which is the driest month in Keystone?
    January is the driest month with 8 mm of precipitation.

    • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.

     

     

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