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

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fair

39°F

4°C

Humidity 39%
Wind Speed Calm
Barometer 30.14 in
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Last update 29 Mar 3:35 am CDT
Extended Forecast for

Grinnell Regional Airport IA

  • Overnight

    Overnight: Partly cloudy, with a low around 37. South southeast wind 5 to 8 mph.

    Low: 37 °F

    Partly Cloudy

  • Sunday

    Sunday: Increasing clouds, with a high near 68. Breezy, with a south wind 10 to 17 mph, with gusts as high as 25 mph.

    High: 68 °F

    Increasing
    Clouds and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 47. South wind 5 to 9 mph.

    Low: 47 °F

    Mostly Clear

  • Monday

    Monday: Increasing clouds, with a high near 82. Breezy, with a south wind 5 to 10 mph increasing to 11 to 16 mph in the afternoon. Winds could gust as high as 24 mph.

    High: 82 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 55. South wind 11 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 55 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 50 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 70. Windy. New precipitation amounts of less than a tenth of an inch possible.

    High: 70 °F

    Chance
    Showers and
    Windy

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 35. Breezy.

    Low: 35 °F

    Chance
    Showers and
    Breezy

  • Wednesday

    Wednesday: A 30 percent chance of showers after 1pm. Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 31.

    Low: 31 °F

    Chance
    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 37. South southeast wind 5 to 8 mph.
Sunday
Increasing clouds, with a high near 68. Breezy, with a south wind 10 to 17 mph, with gusts as high as 25 mph.
Sunday Night
Mostly clear, with a low around 47. South wind 5 to 9 mph.
Monday
Increasing clouds, with a high near 82. Breezy, with a south wind 5 to 10 mph increasing to 11 to 16 mph in the afternoon. Winds could gust as high as 24 mph.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 55. South wind 11 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
A 50 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 70. Windy. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 35. Breezy.
Wednesday
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 48.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 31.
Thursday
Rain and snow showers likely, becoming all rain after 1pm. Mostly cloudy, with a high near 44. Chance of precipitation is 60%.
Thursday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 34.
Friday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 59.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 41. Chance of precipitation is 70%.
Saturday
A 50 percent chance of showers. Mostly cloudy, with a high near 54. Windy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grinnell Regional Airport IA
 41.71°N 92.75°W
Last Update:
2:43 am CDT Mar 29, 2026
Forecast Valid:
3am CDT Mar 29, 2026-6pm CDT Apr 4, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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