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Hazardous Weather Conditions

Current conditions at

Des Moines International Airport (KDSM)

Lat: 41.53°NLon: 93.65°WElev: 942ft.

A Few Clouds

86°F

30°C

Humidity 55%
Wind Speed S 13 mph
Barometer 29.94 in (1012.9 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 2 Sep 10:54 am CDT
Extended Forecast for

Grimes IA

Heat Advisory September 2, 11:44am until September 3, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 2, 11:44am until September 3, 07:00pm

    NOW until 7:00pm Thu

    Heat Advisory

  • Today

    High: 94 °F

    Sunny

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly after 3am. Mostly clear, with a low around 74. South wind 5 to 8 mph.

    Low: 74 °F

    Mostly Clear
    then Chance
    T-storms

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms, mainly before 9am. Mostly sunny, with a high near 91. South southwest wind 6 to 10 mph.

    High: 91 °F

    Chance
    T-storms then
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 75. South southeast wind around 8 mph.

    Low: 75 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly sunny, with a high near 91. South southwest wind 6 to 8 mph. Chance of precipitation is 20%.

    High: 91 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.

    Low: 71 °F

    Slight Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 94. Heat index values as high as 100. South southwest wind 8 to 10 mph.
Tonight
A 40 percent chance of showers and thunderstorms, mainly after 3am. Mostly clear, with a low around 74. South wind 5 to 8 mph.
Thursday
A 30 percent chance of showers and thunderstorms, mainly before 9am. Mostly sunny, with a high near 91. South southwest wind 6 to 10 mph.
Thursday Night
Mostly clear, with a low around 75. South southeast wind around 8 mph.
Friday
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly sunny, with a high near 91. South southwest wind 6 to 8 mph. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 72.
Saturday
Mostly sunny, with a high near 91.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Sunday
A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 88.
Sunday Night
Partly cloudy, with a low around 69.
Labor Day
Mostly sunny, with a high near 86.
Monday Night
Partly cloudy, with a low around 69.
Tuesday
Partly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grimes IA
 41.65°N 93.77°W
Last Update:
9:52 am CDT Sep 2, 2026
Forecast Valid:
11am CDT Sep 2, 2026-6pm CDT Sep 8, 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