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 with Haze

40°F

4°C

Humidity 84%
Wind Speed SE 7 mph
Barometer 30.05 in
Dewpoint 35°F (2°C)
Visibility 5.00 mi
Wind Chill35°F (2°C)
Last update 24 Dec 1:35 pm CST
Extended Forecast for

Sully IA

  • This Afternoon

    This Afternoon: A slight chance of drizzle before 5pm. Cloudy, with a high near 44. East southeast wind around 6 mph becoming calm.

    High: 44 °F

    Slight Chance
    Drizzle

  • Tonight

    Tonight: Patchy fog after 11pm. Otherwise, cloudy, with a low around 36. Light and variable wind.

    Low: 36 °F

    Patchy Fog

  • Christmas Day

    Christmas Day: Patchy fog before 10am. Otherwise, cloudy, with a high near 44. Northeast wind 5 to 10 mph becoming east southeast in the afternoon.

    High: 44 °F

    Patchy Fog
    then Cloudy

  • Thursday Night

    Thursday Night: A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 40. East wind 5 to 9 mph becoming west southwest after midnight.

    Low: 40 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 51. West northwest wind 3 to 7 mph.

    High: 51 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 56.

    High: 56 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 25. Blustery.

    Low: 25 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Blustery

  • Sunday

    Sunday: Mostly sunny, with a high near 31. Windy.

    High: 31 °F

    Mostly Sunny
    and Windy

Detailed Forecast

This Afternoon
A slight chance of drizzle before 5pm. Cloudy, with a high near 44. East southeast wind around 6 mph becoming calm.
Tonight
Patchy fog after 11pm. Otherwise, cloudy, with a low around 36. Light and variable wind.
Christmas Day
Patchy fog before 10am. Otherwise, cloudy, with a high near 44. Northeast wind 5 to 10 mph becoming east southeast in the afternoon.
Thursday Night
A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 40. East wind 5 to 9 mph becoming west southwest after midnight.
Friday
Mostly sunny, with a high near 51. West northwest wind 3 to 7 mph.
Friday Night
Mostly cloudy, with a low around 38.
Saturday
Mostly cloudy, with a high near 56.
Saturday Night
Mostly cloudy, with a low around 25. Blustery.
Sunday
Mostly sunny, with a high near 31. Windy.
Sunday Night
Mostly clear, with a low around 10. Blustery.
Monday
Sunny, with a high near 22. Blustery.
Monday Night
Partly cloudy, with a low around 12.
Tuesday
Partly sunny, with a high near 32.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sully IA
 41.58°N 92.84°W
Last Update:
9:47 am CST Dec 24, 2025
Forecast Valid:
1pm CST Dec 24, 2025-6pm CST Dec 30, 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