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

54°F

12°C

Humidity 45%
Wind Speed Calm
Barometer 30.01 in
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 13 Nov 5:15 pm CST
Extended Forecast for

Grinnell IA

  • Tonight

    Tonight: Clear, with a low around 42. South southeast wind around 6 mph becoming calm in the evening.

    Low: 42 °F

    Clear

  • Friday

    Friday: Mostly sunny, with a high near 68. Calm wind becoming south southwest 5 to 9 mph in the morning.

    High: 68 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 52. South southwest wind 7 to 10 mph, with gusts as high as 20 mph.

    Low: 52 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 64. West southwest wind 9 to 15 mph becoming north northwest in the morning. Winds could gust as high as 23 mph.

    High: 64 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 33. North northwest wind 5 to 8 mph.

    Low: 33 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy

  • Monday

    Monday: A 30 percent chance of rain after noon. Partly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny
    then Chance
    Rain

  • Monday Night

    Monday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 33.

    Low: 33 °F

    Chance Rain

Detailed Forecast

Tonight
Clear, with a low around 42. South southeast wind around 6 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 68. Calm wind becoming south southwest 5 to 9 mph in the morning.
Friday Night
Mostly cloudy, with a low around 52. South southwest wind 7 to 10 mph, with gusts as high as 20 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 64. West southwest wind 9 to 15 mph becoming north northwest in the morning. Winds could gust as high as 23 mph.
Saturday Night
Mostly clear, with a low around 33. North northwest wind 5 to 8 mph.
Sunday
Sunny, with a high near 52.
Sunday Night
Partly cloudy, with a low around 32.
Monday
A 30 percent chance of rain after noon. Partly sunny, with a high near 49.
Monday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 33.
Tuesday
Partly sunny, with a high near 47.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
Mostly cloudy, with a high near 49.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 37.
Thursday
A 40 percent chance of rain. Mostly cloudy, with a high near 49.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grinnell IA
 41.75°N 92.72°W
Last Update:
5:17 pm CST Nov 13, 2025
Forecast Valid:
5pm CST Nov 13, 2025-6pm CST Nov 20, 2025
 
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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