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

72°F

22°C

Humidity 29%
Wind Speed SW 12 mph
Barometer 29.80 in
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 25 Mar 2:55 pm CDT
Extended Forecast for

Sully IA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 76. South southwest wind around 11 mph.

    High: 76 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 52. South wind around 5 mph becoming north northwest after midnight.

    Low: 52 °F

    Partly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 77. Windy, with a south wind 6 to 11 mph becoming north 17 to 22 mph in the afternoon. Winds could gust as high as 31 mph.

    High: 77 °F

    Chance
    Showers and
    Windy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 33. Windy, with a north northeast wind 14 to 22 mph, with gusts as high as 36 mph.

    Low: 33 °F

    Mostly Cloudy
    and Windy

  • Friday

    Friday: Sunny, with a high near 50. Breezy, with a north northwest wind 13 to 16 mph, with gusts as high as 25 mph.

    High: 50 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Friday Night

    Friday Night: Clear, with a low around 25.

    Low: 25 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 68. Breezy.

    High: 68 °F

    Partly Sunny
    then Partly
    Sunny and
    Breezy

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 76. South southwest wind around 11 mph.
Tonight
Partly cloudy, with a low around 52. South wind around 5 mph becoming north northwest after midnight.
Thursday
A 40 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 77. Windy, with a south wind 6 to 11 mph becoming north 17 to 22 mph in the afternoon. Winds could gust as high as 31 mph.
Thursday Night
Mostly cloudy, with a low around 33. Windy, with a north northeast wind 14 to 22 mph, with gusts as high as 36 mph.
Friday
Sunny, with a high near 50. Breezy, with a north northwest wind 13 to 16 mph, with gusts as high as 25 mph.
Friday Night
Clear, with a low around 25.
Saturday
Sunny, with a high near 55.
Saturday Night
Partly cloudy, with a low around 40.
Sunday
Partly sunny, with a high near 68. Breezy.
Sunday Night
Mostly clear, with a low around 50.
Monday
Mostly sunny, with a high near 76.
Monday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 56.
Tuesday
A 30 percent chance of rain. Partly sunny, with a high near 76. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sully IA
 41.58°N 92.84°W
Last Update:
2:31 pm CDT Mar 25, 2026
Forecast Valid:
3pm CDT Mar 25, 2026-6pm CDT Mar 31, 2026
 
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Additional Resources

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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