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

42°F

6°C

Humidity 48%
Wind Speed Calm
Barometer 30.02 in
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Last update 25 Mar 3:35 am CDT
Extended Forecast for

Grinnell IA

  • Overnight

    Overnight: Partly cloudy, with a low around 41. South southeast wind around 7 mph.

    Low: 41 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 74. South southwest wind 9 to 14 mph, with gusts as high as 24 mph.

    High: 74 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 52. South wind 3 to 5 mph.

    Low: 52 °F

    Partly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers, mainly after 1pm. Increasing clouds, with a high near 72. Windy, with a south southwest wind 7 to 12 mph becoming north 18 to 23 mph in the afternoon. Winds could gust as high as 32 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 72 °F

    Chance
    Showers and
    Windy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 32. Windy, with a north wind 16 to 23 mph, with gusts as high as 34 mph.

    Low: 32 °F

    Mostly Cloudy
    and Windy

  • Friday

    Friday: Sunny, with a high near 48.

    High: 48 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 26.

    Low: 26 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 41. South southeast wind around 7 mph.
Wednesday
Partly sunny, with a high near 74. South southwest wind 9 to 14 mph, with gusts as high as 24 mph.
Wednesday Night
Partly cloudy, with a low around 52. South wind 3 to 5 mph.
Thursday
A 40 percent chance of showers, mainly after 1pm. Increasing clouds, with a high near 72. Windy, with a south southwest wind 7 to 12 mph becoming north 18 to 23 mph in the afternoon. Winds could gust as high as 32 mph. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Mostly cloudy, with a low around 32. Windy, with a north wind 16 to 23 mph, with gusts as high as 34 mph.
Friday
Sunny, with a high near 48.
Friday Night
Clear, with a low around 26.
Saturday
Sunny, with a high near 56.
Saturday Night
Mostly cloudy, with a low around 39.
Sunday
Partly sunny, with a high near 66.
Sunday Night
Partly cloudy, with a low around 49.
Monday
Partly sunny, with a high near 79.
Monday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 55.
Tuesday
A 30 percent chance of rain. Partly sunny, with a high near 75. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grinnell IA
 41.75°N 92.69°W
Last Update:
3:11 am CDT Mar 25, 2026
Forecast Valid:
3am CDT Mar 25, 2026-6pm CDT Mar 31, 2026
 
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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