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.

Fair

64°F

18°C

Humidity 37%
Wind Speed S 20 G 28 mph
Barometer 29.90 in (1012.7 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 29 Mar 5:53 pm CDT
Extended Forecast for

Grundy Center IA

  • Tonight

    Tonight: Clear, with a low around 44. West wind 5 to 9 mph becoming south in the evening.

    Low: 44 °F

    Clear

  • Monday

    Monday: Increasing clouds, with a high near 81. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 81 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 56. South southwest wind around 14 mph, with gusts as high as 21 mph. New rainfall amounts between a quarter and half of an inch possible.

    Low: 56 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of rain and thunderstorms. Partly sunny, with a high near 69. Windy, with a south southwest wind 15 to 25 mph becoming north northwest in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 69 °F

    Chance Rain
    and Windy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 33. Windy, with a north wind 14 to 22 mph, with gusts as high as 30 mph.

    Low: 33 °F

    Mostly Cloudy
    and Windy

  • Wednesday

    Wednesday: A 40 percent chance of showers after 1pm. Mostly cloudy, with a high near 46. Breezy. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 46 °F

    Mostly Cloudy
    then Chance
    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: Rain and snow. Low around 30. Blustery. Chance of precipitation is 80%.

    Low: 30 °F

    Rain/Snow and
    Blustery

  • Thursday

    Thursday: Rain and snow likely. Mostly cloudy, with a high near 43. Breezy. Chance of precipitation is 60%.

    High: 43 °F

    Rain/Snow
    Likely and
    Breezy

  • Thursday Night

    Thursday Night: A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 31.

    Low: 31 °F

    Chance Rain

Detailed Forecast

Tonight
Clear, with a low around 44. West wind 5 to 9 mph becoming south in the evening.
Monday
Increasing clouds, with a high near 81. South wind 5 to 15 mph, with gusts as high as 20 mph.
Monday Night
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 56. South southwest wind around 14 mph, with gusts as high as 21 mph. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
A chance of rain and thunderstorms. Partly sunny, with a high near 69. Windy, with a south southwest wind 15 to 25 mph becoming north northwest in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Mostly cloudy, with a low around 33. Windy, with a north wind 14 to 22 mph, with gusts as high as 30 mph.
Wednesday
A 40 percent chance of showers after 1pm. Mostly cloudy, with a high near 46. Breezy. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain and snow. Low around 30. Blustery. Chance of precipitation is 80%.
Thursday
Rain and snow likely. Mostly cloudy, with a high near 43. Breezy. Chance of precipitation is 60%.
Thursday Night
A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 31.
Friday
A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 55. Breezy.
Friday Night
Rain and thunderstorms likely. Mostly cloudy, with a low around 42. Breezy. Chance of precipitation is 60%.
Saturday
Rain likely. Mostly cloudy, with a high near 54. Windy. Chance of precipitation is 70%.
Saturday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 33. Breezy.
Sunday
Mostly sunny, with a high near 50. Windy.
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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:
6:12 pm CDT Mar 29, 2026
Forecast Valid:
6pm CDT Mar 29, 2026-6pm CDT Apr 5, 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