Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Sisseton, Sisseton Municipal Airport (K8D3)

Lat: 45.67°NLon: 96.99°WElev: 1161ft.

55°F

13°C

Humidity 96%
Wind Speed Calm
Barometer 29.96 in (1013.6 mb)
Dewpoint 54°F (12°C)
Visibility NA
Last update 19 Aug 2:56 am CDT
Extended Forecast for

4 Miles W Sisseton SD

  • Overnight

    Overnight: Partly cloudy, with a low around 58. Light south wind.

    Low: 58 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 79. South southwest wind 5 to 7 mph becoming northwest in the afternoon.

    High: 79 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers, then a chance of showers and thunderstorms after 4am.  Mostly clear, with a low around 64. North wind 6 to 11 mph becoming southwest 12 to 17 mph after midnight.  Chance of precipitation is 30%.

    Low: 64 °F

    Mostly Clear
    then Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers and thunderstorms before 7am.  Mostly sunny, with a high near 82. Breezy, with a southwest wind 13 to 20 mph becoming west northwest in the afternoon.  Chance of precipitation is 10%.

    High: 82 °F

    Slight Chance
    T-storms and
    Breezy then
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62. West northwest wind 6 to 14 mph.

    Low: 62 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 82. North wind 6 to 8 mph.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 60. North northwest wind 8 to 10 mph.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 77. North northeast wind 8 to 10 mph.

    High: 77 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 59. Northeast wind 6 to 8 mph becoming southeast after midnight.

    Low: 59 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 58. Light south wind.
Wednesday
Mostly sunny, with a high near 79. South southwest wind 5 to 7 mph becoming northwest in the afternoon.
Wednesday Night
A slight chance of showers, then a chance of showers and thunderstorms after 4am. Mostly clear, with a low around 64. North wind 6 to 11 mph becoming southwest 12 to 17 mph after midnight. Chance of precipitation is 30%.
Thursday
A slight chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 82. Breezy, with a southwest wind 13 to 20 mph becoming west northwest in the afternoon. Chance of precipitation is 10%.
Thursday Night
Mostly clear, with a low around 62. West northwest wind 6 to 14 mph.
Friday
Sunny, with a high near 82. North wind 6 to 8 mph.
Friday Night
Mostly clear, with a low around 60. North northwest wind 8 to 10 mph.
Saturday
Sunny, with a high near 77. North northeast wind 8 to 10 mph.
Saturday Night
Partly cloudy, with a low around 59. Northeast wind 6 to 8 mph becoming southeast after midnight.
Sunday
Partly sunny, with a high near 78.
Sunday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 62. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 82.
Monday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 65. Chance of precipitation is 20%.
Tuesday
Sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Sisseton SD
 45.65°N 97.13°W (Elev. 1572 ft)
3:26 am CDT Aug 19, 2026
3am CDT Aug 19, 2026-6pm CDT Aug 25, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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