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

78°F

26°C

Humidity 58%
Wind Speed NA
Barometer 29.86 in (1010.5 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 16 May 12:53 pm CDT
Extended Forecast for

Grundy Center IA

  • This Afternoon

    This Afternoon: A 10 percent chance of showers after 5pm. Mostly sunny, with a high near 84. East wind around 8 mph.

    High: 84 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3am. Low around 60. East wind 8 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 60 °F

    Showers

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly before 11am. Mostly cloudy, with a high near 84. Windy, with a southeast wind 11 to 16 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 36 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Showers
    Likely and
    Breezy then
    Partly Sunny
    and Windy

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms between midnight and 1am, then showers and possibly a thunderstorm after 1am. Low around 63. Windy, with a south wind 18 to 23 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 63 °F

    Windy. Mostly
    Cloudy then
    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 84. Windy, with a south wind 18 to 23 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 84 °F

    Showers and
    Windy

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Low around 57. Windy. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    Low: 57 °F

    T-storms and
    Windy

  • Tuesday

    Tuesday: A slight chance of thunderstorms before 7am. Partly sunny, with a high near 69. Windy. Chance of precipitation is 10%.

    High: 69 °F

    Slight Chance
    T-storms and
    Windy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 43. Breezy.

    Low: 43 °F

    Mostly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 10 percent chance of showers after 5pm. Mostly sunny, with a high near 84. East wind around 8 mph.
Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3am. Low around 60. East wind 8 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday
Showers and thunderstorms likely, mainly before 11am. Mostly cloudy, with a high near 84. Windy, with a southeast wind 11 to 16 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 36 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A slight chance of showers and thunderstorms between midnight and 1am, then showers and possibly a thunderstorm after 1am. Low around 63. Windy, with a south wind 18 to 23 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers and possibly a thunderstorm. High near 84. Windy, with a south wind 18 to 23 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers and possibly a thunderstorm. Low around 57. Windy. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Tuesday
A slight chance of thunderstorms before 7am. Partly sunny, with a high near 69. Windy. Chance of precipitation is 10%.
Tuesday Night
Partly cloudy, with a low around 43. Breezy.
Wednesday
Mostly sunny, with a high near 63.
Wednesday Night
Partly cloudy, with a low around 42.
Thursday
Sunny, with a high near 68.
Thursday Night
Partly cloudy, with a low around 46.
Friday
Mostly sunny, with a high near 73.
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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:
12:12 pm CDT May 16, 2026
Forecast Valid:
1pm CDT May 16, 2026-6pm CDT May 22, 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