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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Grinnell IA

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 68. East wind around 8 mph.

    High: 68 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 52. East wind around 6 mph.

    Low: 52 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 66. East southeast wind 3 to 5 mph.

    High: 66 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 20 percent chance of showers between 1am and 5am. Mostly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Slight Chance
    Showers

  • Friday

    Friday: A 50 percent chance of showers. Mostly cloudy, with a high near 68. East southeast wind 3 to 6 mph. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 68 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 50 percent chance of showers after 1am. Mostly cloudy, with a low around 57. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 57 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm. Cloudy, with a high near 63. Chance of precipitation is 70%.

    High: 63 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 56.

    Low: 56 °F

    Chance
    Showers

  • Sunday

    Sunday: Mostly cloudy, with a high near 65.

    High: 65 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Partly sunny, with a high near 68. East wind around 8 mph.
Tonight
Partly cloudy, with a low around 52. East wind around 6 mph.
Thursday
Mostly cloudy, with a high near 66. East southeast wind 3 to 5 mph.
Thursday Night
A 20 percent chance of showers between 1am and 5am. Mostly cloudy, with a low around 57. Calm wind.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 68. East southeast wind 3 to 6 mph. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A 50 percent chance of showers after 1am. Mostly cloudy, with a low around 57. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Showers likely and possibly a thunderstorm. Cloudy, with a high near 63. Chance of precipitation is 70%.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 56.
Sunday
Mostly cloudy, with a high near 65.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Mostly sunny, with a high near 69.
Monday Night
A 30 percent chance of showers. Partly cloudy, with a low around 59.
Tuesday
Showers. High near 67. Chance of precipitation is 80%.
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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:
1:47 pm CDT Sep 23, 2026
Forecast Valid:
3pm CDT Sep 23, 2026-6pm CDT Sep 29, 2026
 
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