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

62°F

17°C

Humidity 22%
Wind Speed SE 18 G 24 mph
Barometer 30.13 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 20 Apr 3:35 pm CDT
Extended Forecast for

Hartwick IA

  • This Afternoon

    This Afternoon: Sunny, with a high near 63. South wind around 15 mph, with gusts as high as 21 mph.

    High: 63 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 49. South wind 11 to 14 mph, with gusts as high as 24 mph.

    Low: 49 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 78. Southwest wind 9 to 14 mph, with gusts as high as 23 mph.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 52. West northwest wind around 6 mph becoming southwest in the evening.

    Low: 52 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78. South southwest wind 6 to 11 mph, with gusts as high as 18 mph.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 75. Windy.

    High: 75 °F

    Partly Sunny
    and Breezy
    then Chance
    T-storms and
    Windy

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 49. Breezy. Chance of precipitation is 90%.

    Low: 49 °F

    Showers and
    Breezy

  • Friday

    Friday: A 30 percent chance of showers before 1pm. Partly sunny, with a high near 64.

    High: 64 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 63. South wind around 15 mph, with gusts as high as 21 mph.
Tonight
Partly cloudy, with a low around 49. South wind 11 to 14 mph, with gusts as high as 24 mph.
Tuesday
Sunny, with a high near 78. Southwest wind 9 to 14 mph, with gusts as high as 23 mph.
Tuesday Night
Mostly clear, with a low around 52. West northwest wind around 6 mph becoming southwest in the evening.
Wednesday
Sunny, with a high near 78. South southwest wind 6 to 11 mph, with gusts as high as 18 mph.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 75. Windy.
Thursday Night
Showers and possibly a thunderstorm. Low around 49. Breezy. Chance of precipitation is 90%.
Friday
A 30 percent chance of showers before 1pm. Partly sunny, with a high near 64.
Friday Night
Mostly clear, with a low around 41.
Saturday
Mostly sunny, with a high near 62.
Saturday Night
Mostly cloudy, with a low around 40.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 60.
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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:
2:36 pm CDT Apr 20, 2026
Forecast Valid:
3pm CDT Apr 20, 2026-6pm CDT Apr 26, 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