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

Pierre, Pierre Regional Airport (KPIR)

Lat: 44.38°NLon: 100.29°WElev: 1742ft.

Fair

90°F

32°C

Humidity 44%
Wind Speed S 12 mph
Barometer 29.87 in (1009.8 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 28 Aug 1:53 pm CDT
Extended Forecast for

Vivian SD

  • This Afternoon

    This Afternoon: Mostly sunny and hot, with a high near 94. Breezy, with a south southeast wind around 25 mph, with gusts as high as 38 mph.

    High: 94 °F

    Hot and
    Breezy

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 67. Southeast wind 10 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.

    Low: 67 °F

    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 93. West southwest wind around 8 mph.

    High: 93 °F

    Hot

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, mainly before 11pm. Partly cloudy, with a low around 66. North wind 8 to 11 mph becoming south after midnight. Chance of precipitation is 30%.

    Low: 66 °F

    Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 93. West wind 9 to 13 mph, with gusts as high as 23 mph.

    High: 93 °F

    Hot

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 64. South wind 10 to 13 mph becoming north northwest after midnight. Chance of precipitation is 20%.

    Low: 64 °F

    Slight Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 87. North northwest wind 10 to 13 mph becoming southeast in the afternoon. Winds could gust as high as 21 mph.

    High: 87 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 63. Southeast wind 7 to 9 mph.

    Low: 63 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Partly sunny, with a high near 88. Southeast wind 6 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.

    High: 88 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

This Afternoon
Mostly sunny and hot, with a high near 94. Breezy, with a south southeast wind around 25 mph, with gusts as high as 38 mph.
Tonight
A chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 67. Southeast wind 10 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.
Saturday
Mostly sunny and hot, with a high near 93. West southwest wind around 8 mph.
Saturday Night
A chance of showers and thunderstorms, mainly before 11pm. Partly cloudy, with a low around 66. North wind 8 to 11 mph becoming south after midnight. Chance of precipitation is 30%.
Sunday
Mostly sunny and hot, with a high near 93. West wind 9 to 13 mph, with gusts as high as 23 mph.
Sunday Night
A slight chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 64. South wind 10 to 13 mph becoming north northwest after midnight. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 87. North northwest wind 10 to 13 mph becoming southeast in the afternoon. Winds could gust as high as 21 mph.
Monday Night
Partly cloudy, with a low around 63. Southeast wind 7 to 9 mph.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Southeast wind 6 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 63. Chance of precipitation is 20%.
Wednesday
Sunny and hot, with a high near 92.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 66. Chance of precipitation is 20%.
Thursday
Mostly sunny and hot, with a high near 91.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Vivian SD
 43.92°N 100.29°W (Elev. 1880 ft)
Last Update:
2:06 pm CDT Aug 28, 2026
Forecast Valid:
2pm CDT Aug 28, 2026-6pm CDT Sep 3, 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