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.

Mostly Cloudy

50°F

10°C

Humidity 77%
Wind Speed SE 9 mph
Barometer 29.96 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 5 Mar 8:55 pm CST
Extended Forecast for

Grinnell IA

  • Tonight

    Tonight: A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 2am. Low around 47. Southeast wind 6 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 47 °F

    Mostly Cloudy
    then Rain

  • Friday

    Friday: Rain and thunderstorms before 4pm, then a chance of showers and thunderstorms, mainly after 5pm. High near 68. Breezy, with a south southwest wind 13 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 68 °F

    Breezy.
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 3am, then a chance of showers. Low around 35. Breezy, with a south wind 13 to 17 mph becoming west northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 35 °F

    Breezy.
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 47. Breezy, with a west northwest wind 7 to 16 mph, with gusts as high as 25 mph.

    High: 47 °F

    Partly Sunny
    and Breezy
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 34. Southwest wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 34 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 62. Breezy.

    High: 62 °F

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Clear, with a low around 45. Breezy.

    Low: 45 °F

    Clear and
    Breezy

  • Monday

    Monday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 2am. Low around 47. Southeast wind 6 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Rain and thunderstorms before 4pm, then a chance of showers and thunderstorms, mainly after 5pm. High near 68. Breezy, with a south southwest wind 13 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers and possibly a thunderstorm before 3am, then a chance of showers. Low around 35. Breezy, with a south wind 13 to 17 mph becoming west northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 47. Breezy, with a west northwest wind 7 to 16 mph, with gusts as high as 25 mph.
Saturday Night
Clear, with a low around 34. Southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Sunday
Sunny, with a high near 62. Breezy.
Sunday Night
Clear, with a low around 45. Breezy.
Monday
Sunny, with a high near 68.
Monday Night
Mostly clear, with a low around 47.
Tuesday
A 50 percent chance of rain. Partly sunny, with a high near 70. Breezy.
Tuesday Night
Rain likely. Mostly cloudy, with a low around 39. Breezy. Chance of precipitation is 60%.
Wednesday
Partly sunny, with a high near 49. Breezy.
Wednesday Night
Mostly clear, with a low around 27.
Thursday
Mostly sunny, with a high near 50. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
Grinnell IA
 41.75°N 92.72°W
Last Update:
7:52 pm CST Mar 5, 2026
Forecast Valid:
9pm CST Mar 5, 2026-6pm CDT Mar 12, 2026
 
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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