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

80°F

27°C

Humidity 54%
Wind Speed Vrbl 3 mph
Barometer 30.11 in (1019.0 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 28 Aug 2:53 pm CDT
Extended Forecast for

3 Miles SW Union IA

  • This Afternoon

    This Afternoon: Sunny, with a high near 81. Calm wind.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 57. Calm wind becoming east around 5 mph.

    Low: 57 °F

    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 78. Southeast wind 3 to 6 mph.

    High: 78 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 58. Light southeast wind.

    Low: 58 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 78. South southeast wind 3 to 6 mph.

    High: 78 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 58. Chance of precipitation is 20%.

    Low: 58 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Sunday

    Sunday: A slight chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 1pm. Partly sunny, with a high near 73. Chance of precipitation is 20%.

    High: 73 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 57.

    Low: 57 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Labor Day

    Labor Day: Partly sunny, with a high near 73.

    High: 73 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 81. Calm wind.
Tonight
Mostly clear, with a low around 57. Calm wind becoming east around 5 mph.
Friday
A 20 percent chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 78. Southeast wind 3 to 6 mph.
Friday Night
A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 58. Light southeast wind.
Saturday
Partly sunny, with a high near 78. South southeast wind 3 to 6 mph.
Saturday Night
A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 58. Chance of precipitation is 20%.
Sunday
A slight chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 1pm. Partly sunny, with a high near 73. Chance of precipitation is 20%.
Sunday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 57.
Labor Day
Partly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
A 30 percent chance of showers. Partly cloudy, with a low around 54.
Wednesday
A 30 percent chance of showers. Partly sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Union IA
 42.21°N 93.09°W
Last Update:
1:49 pm CDT Aug 28, 2025
Forecast Valid:
3pm CDT Aug 28, 2025-6pm CDT Sep 3, 2025
 
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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