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.

Fair

91°F

33°C

Humidity 64%
Wind Speed SW 12 mph
Barometer 29.96 in (1013.7 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index105°F (41°C)
Last update 16 Aug 4:53 pm CDT
Extended Forecast for

Marshalltown IA

Heat Advisory until August 16, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until August 16, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • This Afternoon

    High: 93 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 72. South wind 5 to 8 mph.

    Low: 72 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 93. Heat index values as high as 101. South southeast wind 6 to 9 mph.

    High: 93 °F

    Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72. South wind around 6 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 72 °F

    Partly Cloudy
    then Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 91. Southwest wind 6 to 9 mph.

    High: 91 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 68. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 85.

    High: 85 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Sunny, with a high near 93. Heat index values as high as 105. South southwest wind around 10 mph.
Tonight
Mostly clear, with a low around 72. South wind 5 to 8 mph.
Sunday
Sunny, with a high near 93. Heat index values as high as 101. South southeast wind 6 to 9 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72. South wind around 6 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 91. Southwest wind 6 to 9 mph.
Monday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 68. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 85.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Sunny, with a high near 81.
Thursday Night
Mostly clear, with a low around 59.
Friday
Sunny, with a high near 83.
Friday Night
Mostly clear, with a low around 61.
Saturday
Mostly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marshalltown IA
 42.04°N 92.92°W
Last Update:
4:38 pm CDT Aug 16, 2025
Forecast Valid:
5pm CDT Aug 16, 2025-6pm CDT Aug 23, 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