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

Autumn Temperatures for Eastern Third of the Country; Super Typhoon Approaching Guam

Cooler and less humid conditions for the eastern third of the nation as a cold slides off the east coast. Combination of dry and breezy conditions may result in spread of wildfires across the lower Mississippi Valley. In addition, fire weather conditions linger into portions of Southern California. For Guam, a super typhoon is approaching. Read More >

Current conditions at

Chamberlain, Chamberlain Municipal Airport (K9V9)

Lat: 43.77°NLon: 99.32°WElev: 1693ft.

Fair

52°F

11°C

Humidity 53%
Wind Speed S 8 mph
Barometer 29.99 in
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 18 Oct 1:35 am CDT
Extended Forecast for

Reliance SD

  • Overnight

    Overnight: Mostly clear, with a low around 45. South wind 11 to 14 mph.

    Low: 45 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 67. South wind 5 to 11 mph becoming north in the afternoon.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41. North northeast wind around 11 mph.

    Low: 41 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 61. Northeast wind 9 to 11 mph.

    High: 61 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 45. Southeast wind around 10 mph.

    Low: 45 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 69. South southeast wind 10 to 17 mph, with gusts as high as 26 mph.

    High: 69 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 49. Southeast wind 9 to 13 mph, with gusts as high as 22 mph.

    Low: 49 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 70. South wind around 9 mph becoming north northwest in the afternoon.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 48. North wind around 6 mph becoming east southeast after midnight.

    Low: 48 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 45. South wind 11 to 14 mph.
Sunday
Sunny, with a high near 67. South wind 5 to 11 mph becoming north in the afternoon.
Sunday Night
Mostly clear, with a low around 41. North northeast wind around 11 mph.
Monday
Sunny, with a high near 61. Northeast wind 9 to 11 mph.
Monday Night
Mostly clear, with a low around 45. Southeast wind around 10 mph.
Tuesday
Sunny, with a high near 69. South southeast wind 10 to 17 mph, with gusts as high as 26 mph.
Tuesday Night
Mostly clear, with a low around 49. Southeast wind 9 to 13 mph, with gusts as high as 22 mph.
Wednesday
Sunny, with a high near 70. South wind around 9 mph becoming north northwest in the afternoon.
Wednesday Night
Mostly clear, with a low around 48. North wind around 6 mph becoming east southeast after midnight.
Thursday
Sunny, with a high near 73.
Thursday Night
A chance of showers. Partly cloudy, with a low around 57. Chance of precipitation is 30%.
Friday
A slight chance of showers. Partly sunny, with a high near 75. Breezy. Chance of precipitation is 20%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 56. Breezy. Chance of precipitation is 40%.
Saturday
A chance of showers. Partly sunny, with a high near 67. Breezy. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Reliance SD
 43.88°N 99.6°W (Elev. 1781 ft)
Last Update:
1:21 am CDT Oct 18, 2026
Forecast Valid:
1am CDT Oct 18, 2026-6pm CDT Oct 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation