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

Marshalltown, Marshalltown Municipal Airport (KMIW)

Lat: 42.11°NLon: 92.92°WElev: 971ft.

Mostly Cloudy

67°F

19°C

Humidity 91%
Wind Speed N 7 mph
Barometer 29.96 in (1013.8 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 19 Aug 7:53 am CDT
Extended Forecast for

4 Miles WSW Grundy Center IA

  • Today

    Today: Partly sunny, with a high near 78. Northeast wind 3 to 5 mph.

    High: 78 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 58. Calm wind.

    Low: 58 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Sunny, with a high near 80. Calm wind becoming south southwest 5 to 7 mph in the afternoon.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 63. South wind around 7 mph.  New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Partly Cloudy
    then Chance
    T-storms

  • Friday

    Friday: Sunny, with a high near 81. Southwest wind 6 to 8 mph becoming west northwest in the afternoon.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms.  Mostly clear, with a low around 63.

    Low: 63 °F

    Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 78. Northeast wind 3 to 5 mph.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 58. Calm wind.
Thursday
Sunny, with a high near 80. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Thursday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 63. South wind around 7 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Sunny, with a high near 81. Southwest wind 6 to 8 mph becoming west northwest in the afternoon.
Friday Night
A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 63.
Saturday
Sunny, with a high near 79.
Saturday Night
Partly cloudy, with a low around 58.
Sunday
Mostly sunny, with a high near 75.
Sunday Night
Partly cloudy, with a low around 58.
Monday
Mostly sunny, with a high near 78.
Monday Night
Partly cloudy, with a low around 62.
Tuesday
Mostly sunny, with a high near 81.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Grundy Center IA
 42.34°N 92.85°W
6:51 am CDT Aug 19, 2026
8am CDT Aug 19, 2026-6pm CDT Aug 25, 2026
 
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Additional Resources

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Hourly Weather Forecast

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