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

80°F

27°C

Humidity 54%
Wind Speed S 8 mph
Barometer 29.93 in (1012.7 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 19 Jun 7:53 pm CDT
Extended Forecast for

Le Grand IA

Extreme Heat Watch June 21, 12:00pm until June 22, 09:00pm
Heat Advisory June 20, 12:00pm until June 20, 08:00pm
Click here for hazard details and duration
Extreme Heat Watch
Heat Advisory

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly after 3am. Increasing clouds, with a low around 68. South wind 6 to 11 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Clear then
    Chance
    T-storms

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms, mainly before 11am. Mostly sunny, with a high near 92. Heat index values as high as 100. Windy, with a south wind 13 to 21 mph, with gusts as high as 31 mph. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 92 °F

    Chance
    T-storms and
    Breezy then
    Mostly Sunny
    and Windy

  • Friday Night

    Friday Night: Mostly clear, with a low around 77. Breezy, with a south wind 18 to 20 mph, with gusts as high as 31 mph.

    Low: 77 °F

    Mostly Clear
    and Breezy

  • Saturday

    Saturday: Sunny, with a high near 95. Heat index values as high as 102. Windy, with a south southwest wind 20 to 24 mph, with gusts as high as 34 mph.

    High: 95 °F

    Sunny and
    Windy

  • Saturday Night

    Saturday Night: Clear, with a low around 77. Windy, with a south southwest wind 17 to 21 mph, with gusts as high as 31 mph.

    Low: 77 °F

    Clear and
    Windy

  • Sunday

    Sunday: Sunny, with a high near 95. Windy.

    High: 95 °F

    Sunny and
    Windy

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 75. Breezy.

    Low: 75 °F

    Breezy. Clear
    then Slight
    Chance
    T-storms

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 93.

    High: 93 °F

    Sunny then
    Chance
    T-storms

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.

    Low: 68 °F

    Showers
    Likely

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms, mainly after 3am. Increasing clouds, with a low around 68. South wind 6 to 11 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A 40 percent chance of showers and thunderstorms, mainly before 11am. Mostly sunny, with a high near 92. Heat index values as high as 100. Windy, with a south wind 13 to 21 mph, with gusts as high as 31 mph. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Mostly clear, with a low around 77. Breezy, with a south wind 18 to 20 mph, with gusts as high as 31 mph.
Saturday
Sunny, with a high near 95. Heat index values as high as 102. Windy, with a south southwest wind 20 to 24 mph, with gusts as high as 34 mph.
Saturday Night
Clear, with a low around 77. Windy, with a south southwest wind 17 to 21 mph, with gusts as high as 31 mph.
Sunday
Sunny, with a high near 95. Windy.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 75. Breezy.
Monday
A 50 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 93.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 89. Chance of precipitation is 60%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Wednesday
Showers and thunderstorms likely. Partly sunny, with a high near 89. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Le Grand IA
 42.01°N 92.77°W
Last Update:
6:24 pm CDT Jun 19, 2025
Forecast Valid:
8pm CDT Jun 19, 2025-6pm CDT Jun 26, 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