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

Marshalltown, Marshalltown Municipal Airport (KMIW)

Lat: 42.11°NLon: 92.92°WElev: 971ft.

A Few Clouds

73°F

23°C

Humidity 64%
Wind Speed E 13 mph
Barometer 29.97 in (1014.4 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 26 Jun 6:53 pm CDT
Extended Forecast for

Grundy Center IA

  • Tonight

    Tonight: Mostly clear, with a low around 56. East southeast wind 5 to 9 mph becoming light east.

    Low: 56 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 80. Southeast wind 6 to 15 mph, with gusts as high as 21 mph.

    High: 80 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Increasing clouds, with a low around 66. Breezy, with a southeast wind 13 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    Slight Chance
    T-storms then
    Showers
    Likely and
    Breezy

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms before 7am. Cloudy through mid morning, then gradual clearing, with a high near 90. Windy, with a southeast wind 20 to 22 mph, with gusts as high as 30 mph. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 90 °F

    Windy. Chance
    T-storms then
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 75. Breezy, with a south wind 13 to 18 mph, with gusts as high as 26 mph.

    Low: 75 °F

    Mostly Clear
    and Breezy

  • Monday

    Monday: Sunny, with a high near 93. Windy.

    High: 93 °F

    Sunny and
    Windy

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 76. Windy.

    Low: 76 °F

    Slight Chance
    T-storms and
    Windy

  • Tuesday

    Tuesday: Sunny, with a high near 94. Breezy.

    High: 94 °F

    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. Breezy.

    Low: 74 °F

    Breezy.
    Mostly Clear
    then Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 56. East southeast wind 5 to 9 mph becoming light east.
Saturday
Mostly sunny, with a high near 80. Southeast wind 6 to 15 mph, with gusts as high as 21 mph.
Saturday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Increasing clouds, with a low around 66. Breezy, with a southeast wind 13 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A 30 percent chance of showers and thunderstorms before 7am. Cloudy through mid morning, then gradual clearing, with a high near 90. Windy, with a southeast wind 20 to 22 mph, with gusts as high as 30 mph. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Mostly clear, with a low around 75. Breezy, with a south wind 13 to 18 mph, with gusts as high as 26 mph.
Monday
Sunny, with a high near 93. Windy.
Monday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 76. Windy.
Tuesday
Sunny, with a high near 94. Breezy.
Tuesday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. Breezy.
Wednesday
Mostly sunny, with a high near 94.
Wednesday Night
Mostly clear, with a low around 74.
Thursday
Sunny, with a high near 94.
Thursday Night
Partly cloudy, with a low around 73.
Friday
A 30 percent chance of showers. Mostly sunny, with a high near 92.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grundy Center IA
 42.36°N 92.76°W
Last Update:
5:52 pm CDT Jun 26, 2026
Forecast Valid:
7pm CDT Jun 26, 2026-6pm CDT Jul 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