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

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fair

71°F

22°C

Humidity 94%
Wind Speed SE 12 mph
Barometer 29.93 in
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 8 Aug 6:35 am CDT
Extended Forecast for

2 Miles W Grinnell Regional Airport IA

Heat Advisory August 8, 01:00pm until August 8, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Mostly sunny, with a high near 92. Heat index values as high as 103. South southeast wind 10 to 15 mph, with gusts as high as 24 mph.

    High: 92 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 75. South southeast wind 11 to 14 mph, with gusts as high as 24 mph.

    Low: 75 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. South wind 8 to 10 mph, with gusts as high as 18 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 89 °F

    Chance
    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely, mainly after 1am. Mostly cloudy, with a low around 69. West northwest wind around 5 mph becoming east southeast in the evening. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 69 °F

    T-storms
    Likely

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 83. South wind 5 to 7 mph. New rainfall amounts between a quarter and half of an inch possible.

    High: 83 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Chance of precipitation is 70%. New rainfall amounts between 1 and 2 inches possible.

    Low: 67 °F

    Showers
    Likely

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.

    High: 82 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.

    Low: 66 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 92. Heat index values as high as 103. South southeast wind 10 to 15 mph, with gusts as high as 24 mph.
Tonight
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 75. South southeast wind 11 to 14 mph, with gusts as high as 24 mph.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. South wind 8 to 10 mph, with gusts as high as 18 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and thunderstorms likely, mainly after 1am. Mostly cloudy, with a low around 69. West northwest wind around 5 mph becoming east southeast in the evening. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 83. South wind 5 to 7 mph. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Chance of precipitation is 70%. New rainfall amounts between 1 and 2 inches possible.
Monday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
Monday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Tuesday
Mostly sunny, with a high near 83.
Tuesday Night
Partly cloudy, with a low around 66.
Wednesday
Mostly sunny, with a high near 84.
Wednesday Night
Partly cloudy, with a low around 67.
Thursday
Sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles W Grinnell Regional Airport IA
 41.71°N 92.78°W
Last Update:
6:38 am CDT Aug 8, 2025
Forecast Valid:
6am CDT Aug 8, 2025-6pm CDT Aug 14, 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