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

Marshalltown, Marshalltown Municipal Airport (KMIW)

Lat: 42.11°NLon: 92.92°WElev: 971ft.

Fair

61°F

16°C

Humidity 90%
Wind Speed Calm
Barometer 30.16 in (1020.9 mb)
Dewpoint 58°F (14°C)
Visibility 7.00 mi
Last update 28 Aug 7:53 am CDT
Extended Forecast for

Marshalltown IA

  • Today

    Today: Sunny, with a high near 85. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 85 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 65. South southeast wind 5 to 8 mph.

    Low: 65 °F

    Partly Cloudy

  • Saturday

    Saturday: Showers and thunderstorms likely before 11am, then a slight chance of showers between 11am and 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 86. South wind 8 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 72. South wind 11 to 13 mph, with gusts as high as 22 mph.

    Low: 72 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 93. South wind 10 to 13 mph, with gusts as high as 22 mph.

    High: 93 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 93.

    High: 93 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72.

    Low: 72 °F

    Mostly Clear
    then Chance
    T-storms

  • Tuesday

    Tuesday: Partly sunny, with a high near 90.

    High: 90 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 85. Calm wind becoming west southwest around 5 mph in the afternoon.
Tonight
Partly cloudy, with a low around 65. South southeast wind 5 to 8 mph.
Saturday
Showers and thunderstorms likely before 11am, then a slight chance of showers between 11am and 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 86. South wind 8 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Partly cloudy, with a low around 72. South wind 11 to 13 mph, with gusts as high as 22 mph.
Sunday
Mostly sunny, with a high near 93. South wind 10 to 13 mph, with gusts as high as 22 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74.
Monday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 93.
Monday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72.
Tuesday
Partly sunny, with a high near 90.
Tuesday Night
A 40 percent chance of showers. Partly cloudy, with a low around 69.
Wednesday
Mostly sunny, with a high near 92.
Wednesday Night
Partly cloudy, with a low around 71.
Thursday
Mostly sunny, with a high near 92.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marshalltown IA
 42.04°N 92.92°W
Last Update:
6:31 am CDT Aug 28, 2026
Forecast Valid:
8am CDT Aug 28, 2026-6pm CDT Sep 3, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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