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.

Fog

44°F

7°C

Humidity 93%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 42°F (6°C)
Visibility 0.15 mi
Last update 20 Nov 10:55 am CST
Extended Forecast for

Grinnell Regional Airport IA

Dense Fog Advisory November 20, 11:03am until November 20, 12:00pm
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory November 20, 11:03am until November 20, 12:00pm

    NOW until 12:00pm Thu

    Dense Fog Advisory

  • Today

    High: 50 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 20 percent chance of rain after 5am. Patchy fog between 8pm and 9pm. Otherwise, mostly cloudy, with a low around 39. North northeast wind 3 to 8 mph.

    Low: 39 °F

    Patchy Fog
    then Slight
    Chance Rain

  • Friday

    Friday: A 20 percent chance of rain. Mostly cloudy, with a high near 49. Northeast wind 6 to 8 mph.

    High: 49 °F

    Slight Chance
    Rain

  • Friday Night

    Friday Night: Cloudy, then gradually becoming partly cloudy, with a low around 31. North northeast wind around 5 mph becoming calm in the evening.

    Low: 31 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 54. Calm wind becoming southwest 5 to 7 mph in the morning.

    High: 54 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

Detailed Forecast

Today
Mostly cloudy, with a high near 50. Southwest wind around 5 mph becoming light and variable in the afternoon.
Tonight
A 20 percent chance of rain after 5am. Patchy fog between 8pm and 9pm. Otherwise, mostly cloudy, with a low around 39. North northeast wind 3 to 8 mph.
Friday
A 20 percent chance of rain. Mostly cloudy, with a high near 49. Northeast wind 6 to 8 mph.
Friday Night
Cloudy, then gradually becoming partly cloudy, with a low around 31. North northeast wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 54. Calm wind becoming southwest 5 to 7 mph in the morning.
Saturday Night
Mostly clear, with a low around 37.
Sunday
Sunny, with a high near 58.
Sunday Night
Partly cloudy, with a low around 37.
Monday
A 40 percent chance of rain. Mostly cloudy, with a high near 52.
Monday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 42.
Tuesday
A 30 percent chance of rain. Partly sunny, with a high near 52.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
Mostly sunny, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grinnell Regional Airport IA
 41.69°N 92.75°W
Last Update:
9:43 am CST Nov 20, 2025
Forecast Valid:
11am CST Nov 20, 2025-6pm CST Nov 26, 2025
 
Forecast Discussion
 
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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