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

25°F

-4°C

Humidity 70%
Wind Speed E 12 mph
Barometer 30.09 in
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill14°F (-10°C)
Last update 8 Feb 5:35 am CST
Extended Forecast for

Sully IA

  • Today

    Today: Mostly sunny, with a high near 43. East southeast wind 6 to 13 mph, with gusts as high as 22 mph.

    High: 43 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 27. East wind around 5 mph becoming south after midnight.

    Low: 27 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 59. South wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 59 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 34. South wind around 9 mph becoming north northwest after midnight.

    Low: 34 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 47. North northwest wind 7 to 10 mph.

    High: 47 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 46.

    High: 46 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of rain and snow after midnight. Mostly cloudy, with a low around 32. Chance of precipitation is 20%.

    Low: 32 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Thursday

    Thursday: A chance of rain and snow. Mostly cloudy, with a high near 43. Chance of precipitation is 50%.

    High: 43 °F

    Chance
    Rain/Snow

Detailed Forecast

Today
Mostly sunny, with a high near 43. East southeast wind 6 to 13 mph, with gusts as high as 22 mph.
Tonight
Partly cloudy, with a low around 27. East wind around 5 mph becoming south after midnight.
Monday
Mostly sunny, with a high near 59. South wind 6 to 11 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 34. South wind around 9 mph becoming north northwest after midnight.
Tuesday
Mostly cloudy, with a high near 47. North northwest wind 7 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 27.
Wednesday
Partly sunny, with a high near 46.
Wednesday Night
A slight chance of rain and snow after midnight. Mostly cloudy, with a low around 32. Chance of precipitation is 20%.
Thursday
A chance of rain and snow. Mostly cloudy, with a high near 43. Chance of precipitation is 50%.
Thursday Night
A chance of rain and snow before midnight. Mostly cloudy, with a low around 27. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 44.
Friday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 29.
Saturday
A chance of rain and snow. Mostly cloudy, with a high near 42. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sully IA
 41.58°N 92.84°W
Last Update:
5:17 am CST Feb 8, 2026
Forecast Valid:
5am CST Feb 8, 2026-6pm CST Feb 14, 2026
 
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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