National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

ONIDAMUNC (K98D)

Lat: 44.7°NLon: 100.1°WElev: 1874ft.

A Few Clouds

64°F

18°C

Humidity 68%
Wind Speed E 8 mph
Barometer 30.03 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 28 May 2:15 am CDT
Extended Forecast for

Tolstoy SD

  • Overnight

    Overnight: Partly cloudy, with a low around 59. East southeast wind around 8 mph.

    Low: 59 °F

    Partly Cloudy

  • Thursday

    Thursday: Cloudy, then gradually becoming mostly sunny and hot, with a high near 90. Breezy, with a south southeast wind 10 to 15 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 90 °F

    Partly Sunny
    then Partly
    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Cloudy, with a low around 60. Breezy, with a south southeast wind 13 to 20 mph, with gusts as high as 28 mph.

    Low: 60 °F

    Mostly Cloudy
    and Breezy
    then Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 83. Breezy, with a south southeast wind 13 to 18 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 37 mph.

    High: 83 °F

    Mostly Cloudy
    and Breezy

  • Friday Night

    Friday Night: A chance of showers, mainly after 1am. Mostly cloudy, with a low around 56. Breezy, with a southeast wind 17 to 25 mph, with gusts as high as 33 mph. Chance of precipitation is 40%.

    Low: 56 °F

    Chance
    Showers and
    Breezy

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 81. Breezy, with a southeast wind 18 to 26 mph, with gusts as high as 36 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Showers
    Likely and
    Breezy

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 55. Breezy, with a southeast wind 21 to 26 mph, with gusts as high as 34 mph. Chance of precipitation is 80%.

    Low: 55 °F

    Showers and
    Breezy

  • Sunday

    Sunday: A chance of showers and thunderstorms. Partly sunny, with a high near 82. Breezy, with a south southeast wind around 22 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.

    High: 82 °F

    Breezy.
    Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 57. Southeast wind 11 to 18 mph. Chance of precipitation is 40%.

    Low: 57 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 59. East southeast wind around 8 mph.
Thursday
Cloudy, then gradually becoming mostly sunny and hot, with a high near 90. Breezy, with a south southeast wind 10 to 15 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 30 mph.
Thursday Night
Cloudy, with a low around 60. Breezy, with a south southeast wind 13 to 20 mph, with gusts as high as 28 mph.
Friday
Mostly cloudy, with a high near 83. Breezy, with a south southeast wind 13 to 18 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 37 mph.
Friday Night
A chance of showers, mainly after 1am. Mostly cloudy, with a low around 56. Breezy, with a southeast wind 17 to 25 mph, with gusts as high as 33 mph. Chance of precipitation is 40%.
Saturday
Showers likely, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 81. Breezy, with a southeast wind 18 to 26 mph, with gusts as high as 36 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and possibly a thunderstorm. Low around 55. Breezy, with a southeast wind 21 to 26 mph, with gusts as high as 34 mph. Chance of precipitation is 80%.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Breezy, with a south southeast wind around 22 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.
Sunday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 57. Southeast wind 11 to 18 mph. Chance of precipitation is 40%.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 79. Chance of precipitation is 40%.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 54. Chance of precipitation is 40%.
Tuesday
A slight chance of showers. Partly sunny, with a high near 79. Chance of precipitation is 20%.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 54. Chance of precipitation is 30%.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 80. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Tolstoy SD
 45.21°N 99.61°W (Elev. 1900 ft)
Last Update:
2:36 am CDT May 28, 2026
Forecast Valid:
2am CDT May 28, 2026-6pm CDT Jun 3, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation