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.

Fair

21°F

-6°C

Humidity 85%
Wind Speed N 10 mph
Barometer 30.35 in
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill10°F (-12°C)
Last update 28 Feb 11:15 pm CST
Extended Forecast for

3 Miles NNW Hartwick IA

  • Tonight

    Tonight: Partly cloudy, with a low around 17. North northeast wind around 8 mph.

    Low: 17 °F

    Partly Cloudy

  • Sunday

    Sunday: Increasing clouds, with a high near 35. Wind chill values as low as 10. East wind 6 to 8 mph.

    High: 35 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 24. East southeast wind around 7 mph.

    Low: 24 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 43. Southeast wind 7 to 9 mph.

    High: 43 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Rain, mainly after midnight. Low around 32. Southeast wind 5 to 7 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 32 °F

    Chance Rain
    then Rain

  • Tuesday

    Tuesday: Rain likely, mainly before noon. Mostly cloudy, with a high near 46. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 46 °F

    Rain Likely

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 50.

    High: 50 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy
    then Chance
    Rain

Detailed Forecast

Tonight
Partly cloudy, with a low around 17. North northeast wind around 8 mph.
Sunday
Increasing clouds, with a high near 35. Wind chill values as low as 10. East wind 6 to 8 mph.
Sunday Night
Mostly cloudy, with a low around 24. East southeast wind around 7 mph.
Monday
Mostly cloudy, with a high near 43. Southeast wind 7 to 9 mph.
Monday Night
Rain, mainly after midnight. Low around 32. Southeast wind 5 to 7 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Rain likely, mainly before noon. Mostly cloudy, with a high near 46. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Partly cloudy, with a low around 34.
Wednesday
Partly sunny, with a high near 50.
Wednesday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 35.
Thursday
A 30 percent chance of rain before noon. Mostly cloudy, with a high near 58.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 38.
Friday
Rain likely. Mostly cloudy, with a high near 56. Chance of precipitation is 60%.
Friday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 31.
Saturday
A 30 percent chance of rain. Mostly cloudy, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Hartwick IA
 41.81°N 92.37°W
Last Update:
10:31 pm CST Feb 28, 2026
Forecast Valid:
11pm CST Feb 28, 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