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.

Mostly Cloudy

66°F

19°C

Humidity 96%
Wind Speed Calm
Barometer 29.80 in (1008.3 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 18 Jun 1:53 am CDT
Extended Forecast for

4 Miles WSW Union IA

  • Overnight

    Overnight: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Light and variable wind. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms after 8am. Mostly cloudy, with a high near 78. Light and variable wind becoming north 5 to 9 mph in the morning. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Showers
    Likely then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms before 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 60. West northwest wind 5 to 8 mph.

    Low: 60 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 86. West wind 6 to 8 mph.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Mostly clear, with a low around 67. South southwest wind 7 to 10 mph. Chance of precipitation is 20%.

    Low: 67 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms before 1pm. Sunny, with a high near 92. Windy.

    High: 92 °F

    Slight Chance
    T-storms and
    Windy

  • Friday Night

    Friday Night: Mostly clear, with a low around 76. Breezy.

    Low: 76 °F

    Mostly Clear
    and Breezy

  • Saturday

    Saturday: Sunny, with a high near 96. Windy.

    High: 96 °F

    Sunny and
    Windy

  • Saturday Night

    Saturday Night: Clear, with a low around 76. Breezy.

    Low: 76 °F

    Clear and
    Breezy

Detailed Forecast

Overnight
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Light and variable wind. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms after 8am. Mostly cloudy, with a high near 78. Light and variable wind becoming north 5 to 9 mph in the morning. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A 20 percent chance of showers and thunderstorms before 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 60. West northwest wind 5 to 8 mph.
Juneteenth
Sunny, with a high near 86. West wind 6 to 8 mph.
Thursday Night
A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Mostly clear, with a low around 67. South southwest wind 7 to 10 mph. Chance of precipitation is 20%.
Friday
A 20 percent chance of showers and thunderstorms before 1pm. Sunny, with a high near 92. Windy.
Friday Night
Mostly clear, with a low around 76. Breezy.
Saturday
Sunny, with a high near 96. Windy.
Saturday Night
Clear, with a low around 76. Breezy.
Sunday
Sunny, with a high near 95. Windy.
Sunday Night
Mostly clear, with a low around 74. Breezy.
Monday
A 30 percent chance of showers and thunderstorms. Sunny, with a high near 92.
Monday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Tuesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Union IA
 42.21°N 93.15°W
Last Update:
1:54 am CDT Jun 18, 2025
Forecast Valid:
2am CDT Jun 18, 2025-6pm CDT Jun 24, 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