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.

Overcast

64°F

18°C

Humidity 68%
Wind Speed E 14 mph
Barometer 30.18 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 16 Sep 3:15 pm CDT
Extended Forecast for

Seneca SD

  • This Afternoon

    This Afternoon: A slight chance of showers. Partly sunny, with a high near 69. South southeast wind around 16 mph. Chance of precipitation is 20%.

    High: 69 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Partly cloudy, with a low around 51. Southeast wind 6 to 11 mph becoming light and variable after midnight.

    Low: 51 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 72. North northeast wind 6 to 15 mph becoming east in the afternoon. Winds could gust as high as 23 mph.

    High: 72 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 3am, then a chance of showers and thunderstorms between 3am and 4am, then showers likely and possibly a thunderstorm after 4am. Some of the storms could produce heavy rainfall. Low around 57. East wind 13 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    Low: 57 °F

    Chance
    Showers then
    Heavy Rain

  • Friday

    Friday: Showers, mainly before 1pm. The rain could be heavy at times. High near 67. Breezy, with a northeast wind 16 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 67 °F

    Heavy Rain
    and Breezy

  • Friday Night

    Friday Night: A slight chance of showers before 1am. Cloudy, with a low around 53. North northeast wind 10 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    Low: 53 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Cloudy, with a high near 66. North northeast wind 11 to 13 mph, with gusts as high as 21 mph.

    High: 66 °F

    Cloudy

  • Saturday Night

    Saturday Night: A slight chance of showers after 1am. Mostly cloudy, with a low around 53. East northeast wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 53 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: A chance of showers. Cloudy, with a high near 63. East wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.

    High: 63 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
A slight chance of showers. Partly sunny, with a high near 69. South southeast wind around 16 mph. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 51. Southeast wind 6 to 11 mph becoming light and variable after midnight.
Thursday
Partly sunny, with a high near 72. North northeast wind 6 to 15 mph becoming east in the afternoon. Winds could gust as high as 23 mph.
Thursday Night
Showers and possibly a thunderstorm before 3am, then a chance of showers and thunderstorms between 3am and 4am, then showers likely and possibly a thunderstorm after 4am. Some of the storms could produce heavy rainfall. Low around 57. East wind 13 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Friday
Showers, mainly before 1pm. The rain could be heavy at times. High near 67. Breezy, with a northeast wind 16 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Friday Night
A slight chance of showers before 1am. Cloudy, with a low around 53. North northeast wind 10 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Saturday
Cloudy, with a high near 66. North northeast wind 11 to 13 mph, with gusts as high as 21 mph.
Saturday Night
A slight chance of showers after 1am. Mostly cloudy, with a low around 53. East northeast wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Sunday
A chance of showers. Cloudy, with a high near 63. East wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
Sunday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.
Monday
A slight chance of showers. Mostly cloudy, with a high near 63. Chance of precipitation is 20%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 52. Chance of precipitation is 30%.
Tuesday
Partly sunny, with a high near 69.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Seneca SD
 45.06°N 99.51°W (Elev. 1893 ft)
Last Update:
2:52 pm CDT Sep 16, 2026
Forecast Valid:
3pm CDT Sep 16, 2026-6pm CDT Sep 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation