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

Hazardous Weather Conditions

Current conditions at

Marshalltown, Marshalltown Municipal Airport (KMIW)

Lat: 42.11°NLon: 92.92°WElev: 971ft.

A Few Clouds

74°F

23°C

Humidity 88%
Wind Speed E 7 mph
Barometer 29.86 in (1010.5 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 30 Aug 1:53 pm CDT
Extended Forecast for

Grundy Center IA

  • This Afternoon

    This Afternoon: Showers likely and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms, mainly between 3pm and 5pm. Partly sunny, with a high near 88. South wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    Showers
    Likely

  • Tonight

    Tonight: A 10 percent chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 74. South wind 11 to 14 mph, with gusts as high as 21 mph.

    Low: 74 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms, mainly between 1pm and 2pm. Mostly sunny, with a high near 91. Southwest wind 5 to 10 mph.

    High: 91 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 72. Light and variable wind.

    Low: 72 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 90. Light and variable wind.

    High: 90 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71.

    Low: 71 °F

    Partly Cloudy
    then Chance
    T-storms

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 87.

    High: 87 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
Showers likely and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms, mainly between 3pm and 5pm. Partly sunny, with a high near 88. South wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A 10 percent chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 74. South wind 11 to 14 mph, with gusts as high as 21 mph.
Monday
A 20 percent chance of showers and thunderstorms, mainly between 1pm and 2pm. Mostly sunny, with a high near 91. Southwest wind 5 to 10 mph.
Monday Night
Partly cloudy, with a low around 72. Light and variable wind.
Tuesday
Mostly sunny, with a high near 90. Light and variable wind.
Tuesday Night
Partly cloudy, with a low around 72.
Wednesday
Mostly sunny, with a high near 91.
Wednesday Night
A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71.
Thursday
A 40 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 87.
Thursday Night
Partly cloudy, with a low around 71.
Friday
Mostly sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 69.
Saturday
Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grundy Center IA
 42.36°N 92.76°W
Last Update:
1:57 pm CDT Aug 30, 2026
Forecast Valid:
2pm CDT Aug 30, 2026-6pm CDT Sep 5, 2026
 
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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