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

Severe Thunderstorms for Mid-Atlantic and Northeast; Typhoon Approaching Guam

A cold front will sweep eastward today accompanied by strong to severe thunderstorms for the mid-Atlantic and Northeast today. In the wake of this cold front, autumn like temperatures and gusty winds from the Plains, Mississippi Valley, Great Lakes to most of the eastern seaboard. Fire weather conditions for lower Mississippi Valley into portions of California. For Guam, a typhoon is approaching. Read More >

Current conditions at

Chamberlain, Chamberlain Municipal Airport (K9V9)

Lat: 43.77°NLon: 99.32°WElev: 1693ft.

Fair

41°F

5°C

Humidity 65%
Wind Speed S 12 mph
Barometer 30.39 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 17 Oct 3:55 am CDT
Extended Forecast for

Stephan SD

  • Today

    Today: Sunny, with a high near 68. South wind 14 to 16 mph, with gusts as high as 24 mph.

    High: 68 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 40. South wind 8 to 13 mph, with gusts as high as 21 mph.

    Low: 40 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 66. Light and variable wind becoming northeast 8 to 13 mph in the afternoon.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. Northeast wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 62. East wind around 11 mph.

    High: 62 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 42. Southeast wind around 10 mph.

    Low: 42 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 67. South southeast wind 10 to 17 mph, with gusts as high as 25 mph.

    High: 67 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 48. South southeast wind 8 to 13 mph, with gusts as high as 22 mph.

    Low: 48 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 72. South southeast wind 7 to 9 mph becoming west in the afternoon.

    High: 72 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 68. South wind 14 to 16 mph, with gusts as high as 24 mph.
Tonight
Mostly clear, with a low around 40. South wind 8 to 13 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 66. Light and variable wind becoming northeast 8 to 13 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 39. Northeast wind 9 to 11 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 62. East wind around 11 mph.
Monday Night
Mostly clear, with a low around 42. Southeast wind around 10 mph.
Tuesday
Sunny, with a high near 67. South southeast wind 10 to 17 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 48. South southeast wind 8 to 13 mph, with gusts as high as 22 mph.
Wednesday
Sunny, with a high near 72. South southeast wind 7 to 9 mph becoming west in the afternoon.
Wednesday Night
Mostly clear, with a low around 47.
Thursday
Mostly sunny, with a high near 75.
Thursday Night
A chance of showers. Partly cloudy, with a low around 55. Chance of precipitation is 40%.
Friday
A chance of showers. Mostly cloudy, with a high near 75. Breezy. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Stephan SD
 44.25°N 99.44°W (Elev. 1811 ft)
Last Update:
3:56 am CDT Oct 17, 2026
Forecast Valid:
4am CDT Oct 17, 2026-6pm CDT Oct 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation