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

Hazardous Weather Conditions

Current conditions at

ONIDAMUNC (K98D)

Lat: 44.7°NLon: 100.1°WElev: 1874ft.

Light Drizzle

48°F

9°C

Humidity 76%
Wind Speed NE 7 mph
Barometer 29.67 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 17 May 7:35 am CDT
Extended Forecast for

Agar SD

  • Today

    Today: Showers and thunderstorms likely before 3pm, then a chance of showers. Mostly cloudy, with a high near 60. Breezy, with an east wind 13 to 21 mph becoming north northwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 60 °F

    Showers
    Likely and
    Breezy

  • Tonight

    Tonight: Mostly cloudy, with a low around 36. Breezy, with a north northwest wind 16 to 23 mph, with gusts as high as 33 mph.

    Low: 36 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Monday

    Monday: Showers, with thunderstorms also possible after 4pm. High near 50. Breezy, with a north wind 18 to 22 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 50 °F

    Breezy.
    Cloudy then
    Showers

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 7pm, then showers between 7pm and 1am. Low around 33. North northwest wind 15 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 33 °F

    Showers

  • Tuesday

    Tuesday: Partly sunny, with a high near 55. Northwest wind 15 to 17 mph, with gusts as high as 25 mph.

    High: 55 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Areas of frost after 1am. Otherwise, mostly clear, with a low around 30. North northwest wind 5 to 11 mph becoming east southeast after midnight.

    Low: 30 °F

    Partly Cloudy
    then Areas
    Frost

  • Wednesday

    Wednesday: Widespread frost, mainly before 7am. Otherwise, mostly sunny, with a high near 68. South southeast wind 8 to 17 mph, with gusts as high as 25 mph.

    High: 68 °F

    Frost then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 41. Southeast wind around 16 mph, with gusts as high as 24 mph.

    Low: 41 °F

    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 69. Breezy, with a south wind 16 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.

    High: 69 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms and
    Breezy

Detailed Forecast

Today
Showers and thunderstorms likely before 3pm, then a chance of showers. Mostly cloudy, with a high near 60. Breezy, with an east wind 13 to 21 mph becoming north northwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Mostly cloudy, with a low around 36. Breezy, with a north northwest wind 16 to 23 mph, with gusts as high as 33 mph.
Monday
Showers, with thunderstorms also possible after 4pm. High near 50. Breezy, with a north wind 18 to 22 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
Showers and possibly a thunderstorm before 7pm, then showers between 7pm and 1am. Low around 33. North northwest wind 15 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
Partly sunny, with a high near 55. Northwest wind 15 to 17 mph, with gusts as high as 25 mph.
Tuesday Night
Areas of frost after 1am. Otherwise, mostly clear, with a low around 30. North northwest wind 5 to 11 mph becoming east southeast after midnight.
Wednesday
Widespread frost, mainly before 7am. Otherwise, mostly sunny, with a high near 68. South southeast wind 8 to 17 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly cloudy, with a low around 41. Southeast wind around 16 mph, with gusts as high as 24 mph.
Thursday
A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 69. Breezy, with a south wind 16 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.
Thursday Night
A slight chance of showers after 1am. Mostly cloudy, with a low around 42. Chance of precipitation is 20%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 72. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 46. Chance of precipitation is 30%.
Saturday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 78. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Agar SD
 44.83°N 100.07°W (Elev. 1824 ft)
Last Update:
7:36 am CDT May 17, 2026
Forecast Valid:
7am CDT May 17, 2026-6pm CDT May 23, 2026
 
Forecast Discussion
 
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