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

54°F

12°C

Humidity 96%
Wind Speed Calm
Barometer 29.97 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 11 Oct 11:55 pm CDT
Extended Forecast for

Hartwick IA

  • Overnight

    Overnight: Partly cloudy, with a low around 51. Southeast wind 7 to 9 mph.

    Low: 51 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 77. Breezy, with a southeast wind 11 to 17 mph, with gusts as high as 26 mph.

    High: 77 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: A 30 percent chance of showers, mainly after 7pm. Mostly cloudy, with a low around 59. South southeast wind 6 to 13 mph, with gusts as high as 24 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 59 °F

    Chance
    Showers

  • Columbus Day

    Columbus Day: A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 73. North wind around 7 mph.

    High: 73 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 52. North northeast wind around 6 mph.

    Low: 52 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A 20 percent chance of showers. Mostly cloudy, with a high near 64.

    High: 64 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 51. Southeast wind 7 to 9 mph.
Sunday
Mostly sunny, with a high near 77. Breezy, with a southeast wind 11 to 17 mph, with gusts as high as 26 mph.
Sunday Night
A 30 percent chance of showers, mainly after 7pm. Mostly cloudy, with a low around 59. South southeast wind 6 to 13 mph, with gusts as high as 24 mph. New precipitation amounts of less than a tenth of an inch possible.
Columbus Day
A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 73. North wind around 7 mph.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 52. North northeast wind around 6 mph.
Tuesday
A 20 percent chance of showers. Mostly cloudy, with a high near 64.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 49.
Wednesday
Partly sunny, with a high near 65.
Wednesday Night
Mostly cloudy, with a low around 50.
Thursday
Mostly sunny, with a high near 71.
Thursday Night
Partly cloudy, with a low around 56.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 74.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 50.
Saturday
Mostly sunny, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hartwick IA
 41.79°N 92.34°W
Last Update:
10:43 pm CDT Oct 11, 2025
Forecast Valid:
12am CDT Oct 12, 2025-6pm CDT Oct 18, 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