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.

Fair

64°F

18°C

Humidity 52%
Wind Speed E 8 mph
Barometer 30.06 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 20 Jun 9:15 am CDT
Extended Forecast for

Seneca SD

  • Today

    Today: Mostly sunny, with a high near 76. Light east wind increasing to 10 to 15 mph in the morning.

    High: 76 °F

    Mostly Sunny

  • Tonight

    Tonight: Showers likely, mainly after 4am. Mostly cloudy, with a low around 52. East wind 14 to 17 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 52 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers, mainly before 4pm. High near 68. East wind 14 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 68 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of showers, mainly after 7pm. Mostly cloudy, with a low around 49. East wind 7 to 11 mph becoming north after midnight. Chance of precipitation is 40%.

    Low: 49 °F

    Chance
    Showers

  • Monday

    Monday: Partly sunny, with a high near 74. North wind 7 to 10 mph becoming south in the afternoon.

    High: 74 °F

    Partly Sunny

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 50. South southeast wind 9 to 11 mph becoming west after midnight. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 50 °F

    Chance
    T-storms then
    Showers

  • Tuesday

    Tuesday: A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 74. Breezy, with a west northwest wind 13 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.

    High: 74 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 48. Breezy, with a northwest wind 16 to 21 mph decreasing to 10 to 15 mph in the evening.

    Low: 48 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 74. North northwest wind around 11 mph, with gusts as high as 20 mph.

    High: 74 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 76. Light east wind increasing to 10 to 15 mph in the morning.
Tonight
Showers likely, mainly after 4am. Mostly cloudy, with a low around 52. East wind 14 to 17 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Showers, mainly before 4pm. High near 68. East wind 14 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
A chance of showers, mainly after 7pm. Mostly cloudy, with a low around 49. East wind 7 to 11 mph becoming north after midnight. Chance of precipitation is 40%.
Monday
Partly sunny, with a high near 74. North wind 7 to 10 mph becoming south in the afternoon.
Monday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 50. South southeast wind 9 to 11 mph becoming west after midnight. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 74. Breezy, with a west northwest wind 13 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.
Tuesday Night
Mostly clear, with a low around 48. Breezy, with a northwest wind 16 to 21 mph decreasing to 10 to 15 mph in the evening.
Wednesday
Mostly sunny, with a high near 74. North northwest wind around 11 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 48.
Thursday
Mostly sunny, with a high near 76.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 51. Chance of precipitation is 20%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 79. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Seneca SD
 45.08°N 99.48°W (Elev. 1877 ft)
Last Update:
8:36 am CDT Jun 20, 2026
Forecast Valid:
9am CDT Jun 20, 2026-6pm CDT Jun 26, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation