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

Hazardous Weather Conditions

Current conditions at

Des Moines International Airport (KDSM)

Lat: 41.53°NLon: 93.65°WElev: 942ft.

Overcast

62°F

17°C

Humidity 86%
Wind Speed Calm
Barometer 30.04 in (1016.7 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 20 Sep 6:54 am CDT
Extended Forecast for

Grimes IA

  • Today

    Today: A chance of showers and thunderstorms before 3pm, then a slight chance of showers after 4pm. Mostly cloudy, with a high near 71. South wind 5 to 7 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 71 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Tonight

    Tonight: Mostly cloudy, with a low around 59. Light and variable wind.

    Low: 59 °F

    Mostly Cloudy

  • Sunday

    Sunday: Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 78. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 78 °F

    Patchy Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 61. South wind around 5 mph.

    Low: 61 °F

    Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 79. South wind around 6 mph.

    High: 79 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 40%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 63 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 75.

    High: 75 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.

    Low: 60 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Partly sunny, with a high near 72.

    High: 72 °F

    Partly Sunny

Detailed Forecast

Today
A chance of showers and thunderstorms before 3pm, then a slight chance of showers after 4pm. Mostly cloudy, with a high near 71. South wind 5 to 7 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Mostly cloudy, with a low around 59. Light and variable wind.
Sunday
Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 78. Calm wind becoming southwest around 6 mph in the afternoon.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 61. South wind around 5 mph.
Monday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 79. South wind around 6 mph.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 40%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 75.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Wednesday
Partly sunny, with a high near 72.
Wednesday Night
Partly cloudy, with a low around 56.
Thursday
Mostly sunny, with a high near 70.
Thursday Night
Partly cloudy, with a low around 55.
Friday
Mostly sunny, with a high near 74.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grimes IA
 41.67°N 93.8°W
Last Update:
6:34 am CDT Sep 20, 2025
Forecast Valid:
7am CDT Sep 20, 2025-6pm CDT Sep 26, 2025
 
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Additional Resources

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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