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.

Fair

62°F

17°C

Humidity 93%
Wind Speed SE 13 G 28 mph
Barometer 29.69 in (1004.6 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 18 May 4:53 am CDT
Extended Forecast for

Grundy Center IA

  • Overnight

    Overnight: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 67. South wind around 15 mph, with gusts as high as 22 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Chance
    T-storms

  • Monday

    Monday: A chance of showers and thunderstorms before 8am, then a slight chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 79. Breezy, with a south southwest wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Chance
    T-storms and
    Breezy

  • Monday Night

    Monday Night: Showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then a chance of showers after 4am. Low around 53. Breezy, with a south wind 16 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 53 °F

    T-storms and
    Breezy

  • Tuesday

    Tuesday: A 30 percent chance of showers, mainly before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 63. Windy, with a northwest wind 18 to 21 mph, with gusts as high as 26 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Chance
    Showers and
    Windy then
    Partly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 41. North northwest wind 6 to 15 mph, with gusts as high as 21 mph.

    Low: 41 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 64.

    High: 64 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Overnight
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 67. South wind around 15 mph, with gusts as high as 22 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
A chance of showers and thunderstorms before 8am, then a slight chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 79. Breezy, with a south southwest wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
Showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then a chance of showers after 4am. Low around 53. Breezy, with a south wind 16 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday
A 30 percent chance of showers, mainly before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 63. Windy, with a northwest wind 18 to 21 mph, with gusts as high as 26 mph. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Mostly clear, with a low around 41. North northwest wind 6 to 15 mph, with gusts as high as 21 mph.
Wednesday
Mostly sunny, with a high near 62.
Wednesday Night
Mostly cloudy, with a low around 43.
Thursday
Partly sunny, with a high near 64.
Thursday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 45.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 69.
Friday Night
Mostly cloudy, with a low around 48.
Saturday
Partly sunny, with a high near 76.
Saturday Night
Partly cloudy, with a low around 53.
Sunday
Mostly sunny, with a high near 82.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grundy Center IA
 42.36°N 92.76°W
Last Update:
2:31 am CDT May 18, 2026
Forecast Valid:
5am CDT May 18, 2026-6pm CDT May 24, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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