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.

Light Rain and Breezy

56°F

13°C

Humidity 71%
Wind Speed NW 21 G 30 mph
Barometer 29.76 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 18 Oct 9:35 pm CDT
Extended Forecast for

Grinnell IA

  • Tonight

    Tonight: Showers likely, mainly before midnight. Cloudy early, then gradual clearing, with a low around 44. Windy, with a north northwest wind 15 to 21 mph, with gusts as high as 33 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 44 °F

    Showers
    Likely and
    Windy then
    Chance
    Showers and
    Breezy

  • Sunday

    Sunday: Sunny, with a high near 62. Breezy, with a west northwest wind 14 to 20 mph, with gusts as high as 28 mph.

    High: 62 °F

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Clear, with a low around 43. Light and variable wind becoming south 5 to 7 mph after midnight.

    Low: 43 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 70. Breezy, with a south wind 11 to 18 mph, with gusts as high as 28 mph.

    High: 70 °F

    Sunny and
    Breezy

  • Monday Night

    Monday Night: A 20 percent chance of showers before 1am. Mostly clear, with a low around 44. West wind 10 to 14 mph, with gusts as high as 24 mph.

    Low: 44 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 55. Windy.

    High: 55 °F

    Mostly Sunny
    and Windy

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 34.

    Low: 34 °F

    Clear

Detailed Forecast

Tonight
Showers likely, mainly before midnight. Cloudy early, then gradual clearing, with a low around 44. Windy, with a north northwest wind 15 to 21 mph, with gusts as high as 33 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Sunny, with a high near 62. Breezy, with a west northwest wind 14 to 20 mph, with gusts as high as 28 mph.
Sunday Night
Clear, with a low around 43. Light and variable wind becoming south 5 to 7 mph after midnight.
Monday
Sunny, with a high near 70. Breezy, with a south wind 11 to 18 mph, with gusts as high as 28 mph.
Monday Night
A 20 percent chance of showers before 1am. Mostly clear, with a low around 44. West wind 10 to 14 mph, with gusts as high as 24 mph.
Tuesday
Mostly sunny, with a high near 55. Windy.
Tuesday Night
Mostly clear, with a low around 37.
Wednesday
Sunny, with a high near 59.
Wednesday Night
Clear, with a low around 34.
Thursday
Sunny, with a high near 64.
Thursday Night
Partly cloudy, with a low around 42.
Friday
Mostly sunny, with a high near 62.
Friday Night
Partly cloudy, with a low around 43.
Saturday
Mostly sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grinnell IA
 41.73°N 92.75°W
Last Update:
6:01 pm CDT Oct 18, 2025
Forecast Valid:
9pm CDT Oct 18, 2025-6pm CDT Oct 25, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation