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

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fair

68°F

20°C

Humidity 81%
Wind Speed S 3 mph
Barometer 30.07 in
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 4 Oct 3:35 am CDT
Extended Forecast for

Grinnell IA

  • Overnight

    Overnight: Clear, with a low around 65. South wind around 8 mph.

    Low: 65 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 88. Windy, with a south wind 9 to 14 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 88 °F

    Sunny and
    Windy

  • Saturday Night

    Saturday Night: Clear, with a low around 62. South wind 10 to 13 mph, with gusts as high as 24 mph.

    Low: 62 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 86. Windy, with a south wind 13 to 21 mph, with gusts as high as 32 mph.

    High: 86 °F

    Sunny and
    Windy

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 56. South wind 6 to 9 mph becoming west northwest after midnight. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 56 °F

    Chance
    T-storms then
    Showers
    Likely

  • Monday

    Monday: Showers and possibly a thunderstorm before 4pm, then showers likely. High near 66. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 66 °F

    Showers

  • Monday Night

    Monday Night: Showers likely, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.

    Low: 49 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Mostly sunny, with a high near 66.

    High: 66 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 65. South wind around 8 mph.
Saturday
Sunny, with a high near 88. Windy, with a south wind 9 to 14 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 30 mph.
Saturday Night
Clear, with a low around 62. South wind 10 to 13 mph, with gusts as high as 24 mph.
Sunday
Sunny, with a high near 86. Windy, with a south wind 13 to 21 mph, with gusts as high as 32 mph.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 56. South wind 6 to 9 mph becoming west northwest after midnight. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers and possibly a thunderstorm before 4pm, then showers likely. High near 66. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers likely, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.
Tuesday
Mostly sunny, with a high near 66.
Tuesday Night
Mostly clear, with a low around 41.
Wednesday
Sunny, with a high near 67.
Wednesday Night
Mostly clear, with a low around 43.
Thursday
Mostly sunny, with a high near 69.
Thursday Night
Partly cloudy, with a low around 51.
Friday
Mostly sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grinnell IA
 41.75°N 92.72°W
Last Update:
2:51 am CDT Oct 4, 2025
Forecast Valid:
3am CDT Oct 4, 2025-6pm CDT Oct 10, 2025
 
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Additional Resources

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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