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

63°F

17°C

Humidity 27%
Wind Speed S 20 G 25 mph
Barometer 30.08 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 20 Apr 5:15 pm CDT
Extended Forecast for

Guernsey IA

  • Tonight

    Tonight: Increasing clouds, with a low around 49. South wind 11 to 14 mph, with gusts as high as 24 mph.

    Low: 49 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 78. West southwest wind 10 to 14 mph, with gusts as high as 23 mph.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 52. Southwest wind around 6 mph.

    Low: 52 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78. South wind 5 to 11 mph, with gusts as high as 20 mph.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. South wind around 10 mph, with gusts as high as 21 mph.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 76. Windy. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Partly Sunny
    and Breezy
    then Chance
    T-storms and
    Windy

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 50. Breezy. Chance of precipitation is 90%.

    Low: 50 °F

    Showers and
    Breezy

  • Friday

    Friday: A chance of showers and thunderstorms before 1pm, then a slight chance of showers. Partly sunny, with a high near 64. Chance of precipitation is 30%.

    High: 64 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 49. South wind 11 to 14 mph, with gusts as high as 24 mph.
Tuesday
Sunny, with a high near 78. West southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Tuesday Night
Mostly clear, with a low around 52. Southwest wind around 6 mph.
Wednesday
Sunny, with a high near 78. South wind 5 to 11 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 57. South wind around 10 mph, with gusts as high as 21 mph.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 76. Windy. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and possibly a thunderstorm. Low around 50. Breezy. Chance of precipitation is 90%.
Friday
A chance of showers and thunderstorms before 1pm, then a slight chance of showers. Partly sunny, with a high near 64. Chance of precipitation is 30%.
Friday Night
Mostly clear, with a low around 41.
Saturday
Mostly sunny, with a high near 62.
Saturday Night
Mostly cloudy, with a low around 40.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 61.
Sunday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 42.
Monday
A 40 percent chance of showers. Partly sunny, with a high near 59.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Guernsey IA
 41.66°N 92.34°W
Last Update:
2:36 pm CDT Apr 20, 2026
Forecast Valid:
5pm CDT Apr 20, 2026-6pm CDT Apr 27, 2026
 
Forecast Discussion
 
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Additional Resources

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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