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

35°F

2°C

Humidity 64%
Wind Speed Calm
Barometer 30.28 in
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Last update 2 Mar 12:55 pm CST
Extended Forecast for

3 Miles NNW Hartwick IA

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 43. Southeast wind around 9 mph.

    High: 43 °F

    Mostly Cloudy

  • Tonight

    Tonight: A chance of rain with a slight chance of drizzle before 3am, then a chance of drizzle between 3am and 5am, then a chance of rain after 5am. Mostly cloudy, with a low around 34. Southeast wind 3 to 7 mph. Chance of precipitation is 40%.

    Low: 34 °F

    Slight Chance
    Drizzle then
    Chance Rain

  • Tuesday

    Tuesday: A chance of drizzle, mainly before 9am. Mostly cloudy, with a high near 45. East southeast wind 3 to 6 mph.

    High: 45 °F

    Chance
    Drizzle then
    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain, mainly after midnight. Partly cloudy, with a low around 34. East northeast wind 3 to 6 mph. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 34 °F

    Chance Rain

  • Wednesday

    Wednesday: A 50 percent chance of rain. Partly sunny, with a high near 48. East northeast wind 5 to 7 mph. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 48 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after midnight. Mostly cloudy, with a low around 38. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Rain Likely

  • Thursday

    Thursday: A 30 percent chance of rain before noon. Partly sunny, with a high near 57.

    High: 57 °F

    Chance Rain
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of rain after midnight. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy
    then Chance
    Rain

  • Friday

    Friday: Rain. High near 65. Chance of precipitation is 90%.

    High: 65 °F

    Rain

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 43. Southeast wind around 9 mph.
Tonight
A chance of rain with a slight chance of drizzle before 3am, then a chance of drizzle between 3am and 5am, then a chance of rain after 5am. Mostly cloudy, with a low around 34. Southeast wind 3 to 7 mph. Chance of precipitation is 40%.
Tuesday
A chance of drizzle, mainly before 9am. Mostly cloudy, with a high near 45. East southeast wind 3 to 6 mph.
Tuesday Night
A 30 percent chance of rain, mainly after midnight. Partly cloudy, with a low around 34. East northeast wind 3 to 6 mph. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
A 50 percent chance of rain. Partly sunny, with a high near 48. East northeast wind 5 to 7 mph. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 38. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
A 30 percent chance of rain before noon. Partly sunny, with a high near 57.
Thursday Night
A 50 percent chance of rain after midnight. Mostly cloudy, with a low around 42.
Friday
Rain. High near 65. Chance of precipitation is 90%.
Friday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 37. Chance of precipitation is 60%.
Saturday
Partly sunny, with a high near 54.
Saturday Night
Mostly clear, with a low around 35.
Sunday
Sunny, with a high near 62.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Hartwick IA
 41.81°N 92.37°W
Last Update:
12:16 pm CST Mar 2, 2026
Forecast Valid:
1pm CST Mar 2, 2026-6pm CDT Mar 8, 2026
 
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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