National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Overcast

21°F

-6°C

Humidity 47%
Wind Speed S 12 mph
Barometer 30.12 in
Dewpoint 4°F (-16°C)
Visibility 10.00 mi
Wind Chill9°F (-13°C)
Last update 17 Mar 3:15 pm CDT
Extended Forecast for

3 Miles NNW Hartwick IA

  • This Afternoon

    This Afternoon: A 10 percent chance of snow after 5pm. Cloudy, with a high near 22. Wind chill values as low as 10. South wind 8 to 10 mph.

    High: 22 °F

    Slight Chance
    Snow

  • Tonight

    Tonight: Snow, mainly before midnight. Temperature rising to around 24 by 2am. Wind chill values as low as 10. South southeast wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    Low: 21 °F⇑

    Snow then
    Slight Chance
    Snow

  • Wednesday

    Wednesday: Mostly sunny, with a high near 47. Calm wind becoming west around 5 mph in the afternoon.

    High: 47 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 35. South wind 3 to 6 mph.

    Low: 35 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 57. North wind around 7 mph.

    High: 57 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 10 percent chance of snow after 5pm. Cloudy, with a high near 22. Wind chill values as low as 10. South wind 8 to 10 mph.
Tonight
Snow, mainly before midnight. Temperature rising to around 24 by 2am. Wind chill values as low as 10. South southeast wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Wednesday
Mostly sunny, with a high near 47. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 35. South wind 3 to 6 mph.
Thursday
Mostly sunny, with a high near 57. North wind around 7 mph.
Thursday Night
Partly cloudy, with a low around 36.
Friday
Mostly sunny, with a high near 69.
Friday Night
Mostly cloudy, with a low around 42.
Saturday
Mostly sunny, with a high near 76.
Saturday Night
Mostly clear, with a low around 47.
Sunday
Mostly sunny, with a high near 61.
Sunday Night
Partly cloudy, with a low around 27.
Monday
Partly sunny, with a high near 45.
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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:
2:26 pm CDT Mar 17, 2026
Forecast Valid:
3pm CDT Mar 17, 2026-6pm CDT Mar 23, 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