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

54°F

12°C

Humidity 75%
Wind Speed S 8 mph
Barometer 29.85 in (1011.1 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 4 Nov 7:53 pm CST
Extended Forecast for

Union IA

  • Tonight

    Tonight: Mostly clear, with a low around 41. Breezy, with a south southwest wind 6 to 16 mph becoming northwest after midnight. Winds could gust as high as 30 mph.

    Low: 41 °F

    Clear then
    Mostly Clear
    and Breezy

  • Wednesday

    Wednesday: Sunny, with a high near 56. Breezy, with a north northwest wind 7 to 17 mph, with gusts as high as 37 mph.

    High: 56 °F

    Sunny and
    Breezy then
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 33. Calm wind becoming south southeast around 6 mph after midnight.

    Low: 33 °F

    Mostly Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 58. Breezy, with a south wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 58 °F

    Increasing
    Clouds and
    Breezy

  • Thursday Night

    Thursday Night: A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 43. South wind 8 to 13 mph becoming west after midnight. Winds could gust as high as 18 mph.

    Low: 43 °F

    Chance Rain
    then Partly
    Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 61. Breezy.

    High: 61 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy

  • Saturday

    Saturday: Rain likely, mainly after noon. Mostly cloudy, with a high near 47. Chance of precipitation is 60%.

    High: 47 °F

    Rain Likely

  • Saturday Night

    Saturday Night: A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 22.

    Low: 22 °F

    Chance Rain
    then Mostly
    Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 41. Breezy, with a south southwest wind 6 to 16 mph becoming northwest after midnight. Winds could gust as high as 30 mph.
Wednesday
Sunny, with a high near 56. Breezy, with a north northwest wind 7 to 17 mph, with gusts as high as 37 mph.
Wednesday Night
Mostly clear, with a low around 33. Calm wind becoming south southeast around 6 mph after midnight.
Thursday
Increasing clouds, with a high near 58. Breezy, with a south wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 28 mph.
Thursday Night
A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 43. South wind 8 to 13 mph becoming west after midnight. Winds could gust as high as 18 mph.
Friday
Mostly sunny, with a high near 61. Breezy.
Friday Night
Partly cloudy, with a low around 32.
Saturday
Rain likely, mainly after noon. Mostly cloudy, with a high near 47. Chance of precipitation is 60%.
Saturday Night
A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 22.
Sunday
Mostly sunny, with a high near 37.
Sunday Night
Mostly clear, with a low around 19.
Monday
Sunny, with a high near 39.
Monday Night
Partly cloudy, with a low around 22.
Veterans Day
Partly sunny, with a high near 48.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Union IA
 42.26°N 93.06°W
Last Update:
7:56 pm CST Nov 4, 2025
Forecast Valid:
8pm CST Nov 4, 2025-6pm CST Nov 11, 2025
 
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