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.

Overcast

31°F

-1°C

Humidity 47%
Wind Speed Calm
Barometer 30.45 in
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Last update 1 Mar 12:55 pm CST
Extended Forecast for

Grinnell IA

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 35. East wind 6 to 9 mph.

    High: 35 °F

    Mostly Cloudy

  • Tonight

    Tonight: Partly cloudy, with a low around 25. East wind around 7 mph.

    Low: 25 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 42. Southeast wind 7 to 9 mph.

    High: 42 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 50 percent chance of rain after midnight. Mostly cloudy, with a low around 33. Southeast wind around 6 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 33 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tuesday

    Tuesday: Rain likely, mainly before noon. Mostly cloudy, with a high near 45. East wind 5 to 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 45 °F

    Rain Likely

  • Tuesday Night

    Tuesday Night: A chance of rain before 9pm, then a chance of rain and thunderstorms between 9pm and midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 37. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 37 °F

    Chance Rain

  • Wednesday

    Wednesday: A 50 percent chance of rain and thunderstorms. Partly sunny, with a high near 50.

    High: 50 °F

    Chance Rain
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 37.

    Low: 37 °F

    Chance Rain

  • Thursday

    Thursday: A 30 percent chance of rain before noon. Partly sunny, with a high near 58.

    High: 58 °F

    Chance Rain
    then Partly
    Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 35. East wind 6 to 9 mph.
Tonight
Partly cloudy, with a low around 25. East wind around 7 mph.
Monday
Partly sunny, with a high near 42. Southeast wind 7 to 9 mph.
Monday Night
A 50 percent chance of rain after midnight. Mostly cloudy, with a low around 33. Southeast wind around 6 mph. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Rain likely, mainly before noon. Mostly cloudy, with a high near 45. East wind 5 to 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
A chance of rain before 9pm, then a chance of rain and thunderstorms between 9pm and midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 37. Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
A 50 percent chance of rain and thunderstorms. Partly sunny, with a high near 50.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 37.
Thursday
A 30 percent chance of rain before noon. Partly sunny, with a high near 58.
Thursday Night
Rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Friday
Rain. High near 62. Breezy. Chance of precipitation is 80%.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 30.
Saturday
Mostly sunny, with a high near 52.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grinnell IA
 41.75°N 92.69°W
Last Update:
12:31 pm CST Mar 1, 2026
Forecast Valid:
12pm CST Mar 1, 2026-6pm CST Mar 7, 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