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

71°F

22°C

Humidity 66%
Wind Speed Calm
Barometer 30.10 in (1018.8 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 22 Jun 8:53 pm CDT
Extended Forecast for

Union IASimilar City Names

  • Tonight

    Tonight: Partly cloudy, with a low around 56. Calm wind.

    Low: 56 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 78. Calm wind becoming south 5 to 9 mph in the afternoon.

    High: 78 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 61. South southwest wind 5 to 8 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Mostly Cloudy
    then Showers
    Likely

  • Wednesday

    Wednesday: A chance of thunderstorms before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 81. West northwest wind 5 to 9 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Chance
    T-storms then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 57. West northwest wind 5 to 8 mph becoming calm in the evening.

    Low: 57 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 61.

    Low: 61 °F

    Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 56. Calm wind.
Tuesday
Increasing clouds, with a high near 78. Calm wind becoming south 5 to 9 mph in the afternoon.
Tuesday Night
Showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 61. South southwest wind 5 to 8 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
A chance of thunderstorms before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 81. West northwest wind 5 to 9 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Partly cloudy, with a low around 57. West northwest wind 5 to 8 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 77.
Thursday Night
Partly cloudy, with a low around 56.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 77.
Friday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 61.
Saturday
Partly sunny, with a high near 82.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 68. Breezy.
Sunday
Mostly sunny, with a high near 89. Windy.
Sunday Night
A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 72. Breezy.
Monday
Sunny, with a high near 91. Windy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Union IASimilar City Names
 42.23°N 93.06°W
Last Update:
8:47 pm CDT Jun 22, 2026
Forecast Valid:
9pm CDT Jun 22, 2026-6pm CDT Jun 29, 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