National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat in the East; Critical Fire Weather in the Southwest

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Heat is likely to continue across the eastern U.S. through the Independence Day holiday weekend. Critical fire weather conditions will continue today and likely Tuesday across portions of the Four Corners and northern High Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Marshalltown, Marshalltown Municipal Airport (KMIW)

Lat: 42.11°NLon: 92.92°WElev: 971ft.

A Few Clouds and Breezy

88°F

31°C

Humidity 68%
Wind Speed S 22 G 33 mph
Barometer 29.75 in (1006.3 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 29 Jun 1:53 pm CDT
Extended Forecast for

Whitten IA

Extreme Heat Warning June 29, 02:24pm until June 30, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning June 29, 02:24pm until June 30, 09:00pm

    NOW until 9:00pm Tue

    Extreme Heat Warning

  • This Afternoon

    High: 92 °F

    Sunny and
    Windy

  • Tonight

    Tonight: Partly cloudy, with a low around 76. Windy, with a south wind 13 to 22 mph, with gusts as high as 32 mph.

    Low: 76 °F

    Partly Cloudy
    and Windy
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: Partly sunny, then gradually becoming sunny, with a high near 93. Heat index values as high as 103. Breezy, with a south southwest wind 13 to 17 mph, with gusts as high as 26 mph.

    High: 93 °F

    Becoming
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 74. South southwest wind 11 to 13 mph, with gusts as high as 20 mph. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 74 °F

    Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 92. Breezy, with a south southwest wind 11 to 17 mph, with gusts as high as 26 mph.

    High: 92 °F

    Mostly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 74. Breezy. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 74 °F

    Slight Chance
    T-storms and
    Breezy then
    Showers
    Likely

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 90.

    High: 90 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.

    Low: 72 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 92. Heat index values as high as 105. Windy, with a south wind 22 to 24 mph, with gusts as high as 33 mph.
Tonight
Partly cloudy, with a low around 76. Windy, with a south wind 13 to 22 mph, with gusts as high as 32 mph.
Tuesday
Partly sunny, then gradually becoming sunny, with a high near 93. Heat index values as high as 103. Breezy, with a south southwest wind 13 to 17 mph, with gusts as high as 26 mph.
Tuesday Night
A 40 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 74. South southwest wind 11 to 13 mph, with gusts as high as 20 mph. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Mostly sunny, with a high near 92. Breezy, with a south southwest wind 11 to 17 mph, with gusts as high as 26 mph.
Wednesday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 74. Breezy. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 90.
Thursday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Friday
A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 89.
Friday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71.
Independence Day
Mostly sunny, with a high near 89.
Saturday Night
Showers and thunderstorms likely. Partly cloudy, with a low around 69. Chance of precipitation is 60%.
Sunday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Whitten IA
 42.25°N 93°W
Last Update:
1:27 pm CDT Jun 29, 2026
Forecast Valid:
2pm CDT Jun 29, 2026-6pm CDT Jul 5, 2026
 
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