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

-6°C

22°F

Humidity 85%
Wind Speed S 17 km/h
Barometer 29.94 in
Dewpoint -8°C (18°F)
Visibility 11 km
Wind Chill-12°C (11°F)
Last update 8 Dec 10:55 pm CST
Extended Forecast for

6 Miles WNW Hartwick IA

  • Tonight

    Tonight: Mostly cloudy, with a steady temperature around -4. South wind 11 to 16 km/h becoming west southwest after midnight. Winds could gust as high as 29 km/h.

    Low: -4 °C

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of rain, mainly after 5pm. Mostly cloudy, with a high near 3. West southwest wind 10 to 15 km/h becoming south southwest 19 to 24 km/h in the afternoon. Winds could gust as high as 39 km/h.

    High: 3 °C

    Mostly Cloudy
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: A chance of rain before 3am, then a slight chance of snow showers. Areas of blowing snow after 4am. Mostly cloudy, with a low around -4. Windy, with a southwest wind 24 to 34 km/h becoming west northwest 40 to 50 km/h. Winds could gust as high as 80 km/h. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: -4 °C

    Chance
    Rain/Snow and
    Areas Blowing
    Snow

  • Wednesday

    Wednesday: Areas of blowing snow before 8am. Mostly cloudy, with a steady temperature around -4. Windy, with a northwest wind 38 to 48 km/h decreasing to 21 to 31 km/h. Winds could gust as high as 80 km/h.

    High: -4 °C

    Windy. Areas
    Blowing Snow
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around -12. Northwest wind 11 to 16 km/h decreasing to 5 to 10 km/h after midnight. Winds could gust as high as 29 km/h.

    Low: -12 °C

    Mostly Cloudy
    then Slight
    Chance Snow

  • Thursday

    Thursday: A 40 percent chance of snow. Mostly cloudy, with a high near -5.

    High: -5 °C

    Chance Snow

  • Thursday Night

    Thursday Night: A 30 percent chance of snow. Mostly cloudy, with a low around -13.

    Low: -13 °C

    Chance Snow

  • Friday

    Friday: A 20 percent chance of snow before noon. Mostly cloudy, with a high near -7. Blustery.

    High: -7 °C

    Slight Chance
    Snow then
    Partly Sunny
    and Blustery

  • Friday Night

    Friday Night: Mostly cloudy, with a low around -19.

    Low: -19 °C

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a steady temperature around -4. South wind 11 to 16 km/h becoming west southwest after midnight. Winds could gust as high as 29 km/h.
Tuesday
A 30 percent chance of rain, mainly after 5pm. Mostly cloudy, with a high near 3. West southwest wind 10 to 15 km/h becoming south southwest 19 to 24 km/h in the afternoon. Winds could gust as high as 39 km/h.
Tuesday Night
A chance of rain before 3am, then a slight chance of snow showers. Areas of blowing snow after 4am. Mostly cloudy, with a low around -4. Windy, with a southwest wind 24 to 34 km/h becoming west northwest 40 to 50 km/h. Winds could gust as high as 80 km/h. Chance of precipitation is 40%. Little or no snow accumulation expected.
Wednesday
Areas of blowing snow before 8am. Mostly cloudy, with a steady temperature around -4. Windy, with a northwest wind 38 to 48 km/h decreasing to 21 to 31 km/h. Winds could gust as high as 80 km/h.
Wednesday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around -12. Northwest wind 11 to 16 km/h decreasing to 5 to 10 km/h after midnight. Winds could gust as high as 29 km/h.
Thursday
A 40 percent chance of snow. Mostly cloudy, with a high near -5.
Thursday Night
A 30 percent chance of snow. Mostly cloudy, with a low around -13.
Friday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near -7. Blustery.
Friday Night
Mostly cloudy, with a low around -19.
Saturday
Mostly cloudy and cold, with a high near -14.
Saturday Night
Mostly cloudy, with a low around -21.
Sunday
Mostly sunny, with a high near -11.
Sunday Night
Mostly cloudy, with a low around -16.
Monday
Partly sunny, with a high near -4.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles WNW Hartwick IA
 41.81°N 92.45°W
Last Update:
10:46 pm CST Dec 8, 2025
Forecast Valid:
11pm CST Dec 8, 2025-6pm CST Dec 15, 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