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

33°F

1°C

Humidity 71%
Wind Speed W 10 mph
Barometer 30.21 in
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 5 Apr 4:15 am CDT
Extended Forecast for

Sully IA

  • Today

    Today: Sunny, with a high near 56. West northwest wind 11 to 15 mph, with gusts as high as 23 mph.

    High: 56 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 34. West wind 8 to 10 mph becoming north northwest after midnight.

    Low: 34 °F

    Mostly Clear

  • Monday

    Monday: Partly sunny, with a high near 48. North northwest wind 9 to 13 mph, with gusts as high as 20 mph.

    High: 48 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of snow showers after 1am. Mostly cloudy, with a low around 26. North wind 7 to 10 mph becoming east northeast after midnight.

    Low: 26 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • Tuesday

    Tuesday: A slight chance of snow showers before 1pm, then a chance of rain and snow showers. Mostly cloudy, with a high near 41. Southeast wind 7 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 41 °F

    Slight Chance
    Snow Showers
    then Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: A chance of rain and snow showers before 10pm, then a chance of rain showers. Mostly cloudy, with a low around 35. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 35 °F

    Chance
    Rain/Snow
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 69. Windy. Chance of precipitation is 40%.

    High: 69 °F

    Chance
    Showers and
    Windy

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 44. Breezy. Chance of precipitation is 50%.

    Low: 44 °F

    Chance
    Showers and
    Breezy

  • Thursday

    Thursday: A 50 percent chance of showers. Partly sunny, with a high near 62.

    High: 62 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 56. West northwest wind 11 to 15 mph, with gusts as high as 23 mph.
Tonight
Mostly clear, with a low around 34. West wind 8 to 10 mph becoming north northwest after midnight.
Monday
Partly sunny, with a high near 48. North northwest wind 9 to 13 mph, with gusts as high as 20 mph.
Monday Night
A 20 percent chance of snow showers after 1am. Mostly cloudy, with a low around 26. North wind 7 to 10 mph becoming east northeast after midnight.
Tuesday
A slight chance of snow showers before 1pm, then a chance of rain and snow showers. Mostly cloudy, with a high near 41. Southeast wind 7 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Tuesday Night
A chance of rain and snow showers before 10pm, then a chance of rain showers. Mostly cloudy, with a low around 35. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 69. Windy. Chance of precipitation is 40%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 44. Breezy. Chance of precipitation is 50%.
Thursday
A 50 percent chance of showers. Partly sunny, with a high near 62.
Thursday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 42.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 60.
Friday Night
Showers likely. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Saturday
Showers likely. Mostly cloudy, with a high near 61. Chance of precipitation is 60%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sully IA
 41.58°N 92.84°W
Last Update:
2:57 am CDT Apr 5, 2026
Forecast Valid:
4am CDT Apr 5, 2026-6pm CDT Apr 11, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation