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.

Fair

-14°F

-26°C

Humidity 47%
Wind Speed N 20 G 25 mph
Barometer 30.77 in
Dewpoint -28°F (-33°C)
Visibility 10.00 mi
Wind Chill-40°F (-40°C)
Last update 23 Jan 8:35 am CST
Extended Forecast for

Sully IA

Cold Weather Advisory January 23, 12:00pm until January 24, 03:00am
Extreme Cold Warning January 23, 08:54am until January 23, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory
Extreme Cold Warning
  •  
    Extreme Cold Warning January 23, 08:54am until January 23, 12:00pm

    NOW until 12:00pm Fri

    Extreme Cold Warning

  • Today

    High: -3 °F

    Partly Sunny
    and Blustery
    then Partly
    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around -7. Wind chill values as low as -20. North northeast wind 6 to 8 mph.

    Low: -7 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of snow, mainly after noon. Mostly cloudy and cold, with a high near 3. Wind chill values as low as -20. East northeast wind 3 to 6 mph. Little or no snow accumulation expected.

    High: 3 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 30 percent chance of snow, mainly before midnight. Cloudy, with a low around -1. Wind chill values as low as -10. East northeast wind 3 to 6 mph. Little or no snow accumulation expected.

    Low: -1 °F

    Chance Snow

  • Sunday

    Sunday: Partly sunny and cold, with a high near 10. North northeast wind 6 to 8 mph.

    High: 10 °F

    Cold

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around -5.

    Low: -5 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 16.

    High: 16 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 8.

    Low: 8 °F

    Mostly Clear

Detailed Forecast

Today
Partly sunny and cold, with a high near -3. Wind chill values as low as -35. Blustery, with a north wind 8 to 16 mph, with gusts as high as 23 mph.
Tonight
Mostly cloudy, with a low around -7. Wind chill values as low as -20. North northeast wind 6 to 8 mph.
Saturday
A 30 percent chance of snow, mainly after noon. Mostly cloudy and cold, with a high near 3. Wind chill values as low as -20. East northeast wind 3 to 6 mph. Little or no snow accumulation expected.
Saturday Night
A 30 percent chance of snow, mainly before midnight. Cloudy, with a low around -1. Wind chill values as low as -10. East northeast wind 3 to 6 mph. Little or no snow accumulation expected.
Sunday
Partly sunny and cold, with a high near 10. North northeast wind 6 to 8 mph.
Sunday Night
Partly cloudy, with a low around -5.
Monday
Sunny, with a high near 16.
Monday Night
Mostly clear, with a low around 8.
Tuesday
Mostly sunny, with a high near 22.
Tuesday Night
Partly cloudy, with a low around 4.
Wednesday
Partly sunny, with a high near 17.
Wednesday Night
Partly cloudy, with a low around -1.
Thursday
Mostly sunny, with a high near 13.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sully IA
 41.58°N 92.84°W
Last Update:
6:26 am CST Jan 23, 2026
Forecast Valid:
8am CST Jan 23, 2026-6pm CST Jan 29, 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