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

65°F

18°C

Humidity 48%
Wind Speed NW 18 G 25 mph
Barometer 29.74 in
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 15 Nov 11:35 am CST
Extended Forecast for

Sully IA

  • Today

    Today: Sunny, with a high near 67. Breezy, with a north northwest wind 13 to 17 mph, with gusts as high as 24 mph.

    High: 67 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 33. North northwest wind 5 to 10 mph, with gusts as high as 21 mph.

    Low: 33 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 51. Light northwest wind.

    High: 51 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 35. Calm wind becoming east around 5 mph after midnight.

    Low: 35 °F

    Partly Cloudy

  • Monday

    Monday: A 30 percent chance of rain after noon. Partly sunny, with a high near 52. East southeast wind 6 to 15 mph, with gusts as high as 22 mph.

    High: 52 °F

    Mostly Sunny
    then Chance
    Rain

  • Monday Night

    Monday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 38. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 38 °F

    Rain Likely
    then Chance
    Rain

  • Tuesday

    Tuesday: Partly sunny, with a high near 51.

    High: 51 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 52.

    High: 52 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 67. Breezy, with a north northwest wind 13 to 17 mph, with gusts as high as 24 mph.
Tonight
Mostly clear, with a low around 33. North northwest wind 5 to 10 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 51. Light northwest wind.
Sunday Night
Partly cloudy, with a low around 35. Calm wind becoming east around 5 mph after midnight.
Monday
A 30 percent chance of rain after noon. Partly sunny, with a high near 52. East southeast wind 6 to 15 mph, with gusts as high as 22 mph.
Monday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 38. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
Partly sunny, with a high near 51.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
Partly sunny, with a high near 52.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 39.
Thursday
A 50 percent chance of rain. Partly sunny, with a high near 54.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 40.
Friday
A 30 percent chance of rain. Mostly cloudy, with a high near 50.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sully IA
 41.58°N 92.84°W
Last Update:
10:36 am CST Nov 15, 2025
Forecast Valid:
11am CST Nov 15, 2025-6pm CST Nov 21, 2025
 
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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