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

43°F

6°C

Humidity 64%
Wind Speed Calm
Barometer 30.26 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 3 Nov 11:35 pm CST
Extended Forecast for

Hartwick IA

  • Tonight

    Tonight: Mostly cloudy, with a low around 38. South southeast wind 3 to 5 mph.

    Low: 38 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 65. Southeast wind 6 to 14 mph becoming south southwest in the afternoon. Winds could gust as high as 22 mph.

    High: 65 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 44. South southwest wind 6 to 13 mph becoming northwest after midnight. Winds could gust as high as 24 mph.

    Low: 44 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 57. Breezy, with a north northwest wind 6 to 16 mph, with gusts as high as 26 mph.

    High: 57 °F

    Sunny and
    Breezy then
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 32. Calm wind becoming southeast around 5 mph after midnight.

    Low: 32 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Chance
    Showers then
    Slight Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 58. Breezy.

    High: 58 °F

    Mostly Sunny
    and Breezy

  • Friday Night

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

    Low: 34 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 38. South southeast wind 3 to 5 mph.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 65. Southeast wind 6 to 14 mph becoming south southwest in the afternoon. Winds could gust as high as 22 mph.
Tuesday Night
Mostly clear, with a low around 44. South southwest wind 6 to 13 mph becoming northwest after midnight. Winds could gust as high as 24 mph.
Wednesday
Sunny, with a high near 57. Breezy, with a north northwest wind 6 to 16 mph, with gusts as high as 26 mph.
Wednesday Night
Mostly clear, with a low around 32. Calm wind becoming southeast around 5 mph after midnight.
Thursday
Partly sunny, with a high near 60.
Thursday Night
A 50 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 44.
Friday
Mostly sunny, with a high near 58. Breezy.
Friday Night
Partly cloudy, with a low around 34.
Saturday
A 30 percent chance of rain after noon. Partly sunny, with a high near 54.
Saturday Night
Partly cloudy, with a low around 29.
Sunday
Mostly sunny, with a high near 43.
Sunday Night
Partly cloudy, with a low around 24.
Monday
Mostly sunny, with a high near 45.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hartwick IA
 41.79°N 92.34°W
Last Update:
7:52 pm CST Nov 3, 2025
Forecast Valid:
11pm CST Nov 3, 2025-6pm CST Nov 10, 2025
 
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