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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Chamberlain, Chamberlain Municipal Airport (K9V9)

Lat: 43.77°NLon: 99.32°WElev: 1693ft.

Fair

77°F

25°C

Humidity 72%
Wind Speed SE 7 mph
Barometer 29.81 in
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 28 Aug 11:55 pm CDT
Extended Forecast for

5 Miles WSW Reliance SD

  • Overnight

    Overnight: A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 68. Southeast wind 10 to 15 mph. Chance of precipitation is 30%.

    Low: 68 °F

    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 92. West wind around 8 mph.

    High: 92 °F

    Hot

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, mainly before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 67. North wind 8 to 11 mph becoming south southeast after midnight. Chance of precipitation is 30%.

    Low: 67 °F

    Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 92. Southwest wind 8 to 13 mph becoming southeast in the morning. Winds could gust as high as 22 mph.

    High: 92 °F

    Hot

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 66. Southwest wind around 11 mph becoming north northwest after midnight. Chance of precipitation is 20%.

    Low: 66 °F

    Slight Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 86. Northwest wind 10 to 13 mph becoming east southeast in the afternoon. Winds could gust as high as 21 mph.

    High: 86 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 64. East southeast wind around 8 mph.

    Low: 64 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Partly sunny, with a high near 86. South southeast wind 6 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    High: 86 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 64. East southeast wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    T-storms

Detailed Forecast

Overnight
A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 68. Southeast wind 10 to 15 mph. Chance of precipitation is 30%.
Saturday
Mostly sunny and hot, with a high near 92. West wind around 8 mph.
Saturday Night
A chance of showers and thunderstorms, mainly before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 67. North wind 8 to 11 mph becoming south southeast after midnight. Chance of precipitation is 30%.
Sunday
Mostly sunny and hot, with a high near 92. Southwest wind 8 to 13 mph becoming southeast in the morning. Winds could gust as high as 22 mph.
Sunday Night
A slight chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 66. Southwest wind around 11 mph becoming north northwest after midnight. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 86. Northwest wind 10 to 13 mph becoming east southeast in the afternoon. Winds could gust as high as 21 mph.
Monday Night
Partly cloudy, with a low around 64. East southeast wind around 8 mph.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 86. South southeast wind 6 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 64. East southeast wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Wednesday
Mostly sunny and hot, with a high near 91.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 20%.
Thursday
Partly sunny, with a high near 89.
Thursday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 65. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 89.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Reliance SD
 43.85°N 99.69°W (Elev. 1752 ft)
Last Update:
12:06 am CDT Aug 29, 2026
Forecast Valid:
12am CDT Aug 29, 2026-6pm CDT Sep 4, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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