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.

Fog/Mist

31°F

-1°C

Humidity 100%
Wind Speed NE 3 mph
Barometer 30.18 in (1022.9 mb)
Dewpoint 31°F (-1°C)
Visibility 4.00 mi
Last update 3 Mar 9:53 pm CST
Extended Forecast for

Grundy Center IA

  • Tonight

    Tonight: Patchy fog between midnight and 3am. Areas of freezing fog after 3am. Otherwise, mostly cloudy, with a low around 29. Light northeast wind.

    Low: 29 °F

    Mostly Cloudy
    then Areas
    Freezing Fog
    and Patchy
    Fog

  • Wednesday

    Wednesday: A slight chance of drizzle after 4pm. Patchy fog between 9am and 11am. Areas of freezing fog before 9am. Otherwise, mostly cloudy, with a high near 48. East northeast wind around 6 mph becoming calm in the afternoon.

    High: 48 °F

    Areas
    Freezing Fog
    and Patchy
    Fog then
    Slight Chance
    Drizzle

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers. Patchy dense fog after 9pm. Otherwise, mostly cloudy, with a low around 37. Calm wind. New precipitation amounts of less than a tenth of an inch possible.

    Low: 37 °F

    Chance
    Showers and
    Patchy Dense
    Fog

  • Thursday

    Thursday: A 20 percent chance of showers before noon. Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 56. Calm wind becoming south southeast around 6 mph in the afternoon.

    High: 56 °F

    Slight Chance
    Showers and
    Areas Fog
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 43. Southeast wind 6 to 11 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 43 °F

    Partly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 66. Breezy. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 66 °F

    Showers then
    Showers
    Likely and
    Breezy

  • Friday Night

    Friday Night: Rain likely and possibly a thunderstorm before midnight, then a chance of rain. Mostly cloudy, with a low around 36. Breezy. Chance of precipitation is 70%.

    Low: 36 °F

    Breezy. Rain
    Likely then
    Chance Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 51.

    High: 51 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog between midnight and 3am. Areas of freezing fog after 3am. Otherwise, mostly cloudy, with a low around 29. Light northeast wind.
Wednesday
A slight chance of drizzle after 4pm. Patchy fog between 9am and 11am. Areas of freezing fog before 9am. Otherwise, mostly cloudy, with a high near 48. East northeast wind around 6 mph becoming calm in the afternoon.
Wednesday Night
A 50 percent chance of showers. Patchy dense fog after 9pm. Otherwise, mostly cloudy, with a low around 37. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Thursday
A 20 percent chance of showers before noon. Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 56. Calm wind becoming south southeast around 6 mph in the afternoon.
Thursday Night
Showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 43. Southeast wind 6 to 11 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Showers and possibly a thunderstorm. High near 66. Breezy. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Rain likely and possibly a thunderstorm before midnight, then a chance of rain. Mostly cloudy, with a low around 36. Breezy. Chance of precipitation is 70%.
Saturday
Mostly sunny, with a high near 51.
Saturday Night
Mostly clear, with a low around 36.
Sunday
Sunny, with a high near 62. Breezy.
Sunday Night
Partly cloudy, with a low around 39.
Monday
Mostly sunny, with a high near 66. Breezy.
Monday Night
Partly cloudy, with a low around 45.
Tuesday
A 40 percent chance of rain. Partly sunny, with a high near 62. Breezy.
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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:
5:26 pm CST Mar 3, 2026
Forecast Valid:
10pm CST Mar 3, 2026-6pm CDT Mar 10, 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