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.

Light Snow

30°F

-1°C

Humidity 80%
Wind Speed NW 16 mph
Barometer 30.08 in
Dewpoint 24°F (-4°C)
Visibility 5.00 mi
Wind Chill19°F (-7°C)
Last update 10 Jan 2:35 pm CST
Extended Forecast for

Sully IA

  • This Afternoon

    This Afternoon: A chance of snow before 4pm, then a chance of flurries between 4pm and 5pm. Mostly cloudy, with a steady temperature around 31. Blustery, with a west northwest wind 11 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 40%. Total daytime snow accumulation of less than a half inch possible.

    High: 31 °F

    Chance Snow
    and Blustery

  • Tonight

    Tonight: Partly cloudy, with a low around 21. Wind chill values as low as 10. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 32 mph.

    Low: 21 °F

    Partly Cloudy
    and Blustery

  • Sunday

    Sunday: Sunny, with a high near 33. Wind chill values as low as 10. Northwest wind 8 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph.

    High: 33 °F

    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a steady temperature around 30. Southwest wind 7 to 10 mph, with gusts as high as 18 mph.

    Low: 30 °F

    Increasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 47. West wind around 7 mph.

    High: 47 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 53.

    High: 53 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 32. Breezy.

    High: 32 °F

    Partly Sunny
    and Breezy

Detailed Forecast

This Afternoon
A chance of snow before 4pm, then a chance of flurries between 4pm and 5pm. Mostly cloudy, with a steady temperature around 31. Blustery, with a west northwest wind 11 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 40%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Partly cloudy, with a low around 21. Wind chill values as low as 10. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 32 mph.
Sunday
Sunny, with a high near 33. Wind chill values as low as 10. Northwest wind 8 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph.
Sunday Night
Increasing clouds, with a steady temperature around 30. Southwest wind 7 to 10 mph, with gusts as high as 18 mph.
Monday
Mostly sunny, with a high near 47. West wind around 7 mph.
Monday Night
Mostly cloudy, with a low around 34.
Tuesday
Partly sunny, with a high near 53.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
Partly sunny, with a high near 32. Breezy.
Wednesday Night
Partly cloudy, with a low around 19.
Thursday
Partly sunny, with a high near 37.
Thursday Night
Mostly cloudy, with a low around 29.
Friday
A 30 percent chance of snow. Mostly cloudy, with a high near 36. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sully IA
 41.58°N 92.84°W
Last Update:
2:32 pm CST Jan 10, 2026
Forecast Valid:
2pm CST Jan 10, 2026-6pm CST Jan 16, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation