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National Weather Service Flood Inundation Mapping Available for Iowa in September 2025

Hazardous Weather Conditions

Current conditions at

Grinnell Municipal Airfield (KGGI)

Lat: 41.71°NLon: 92.73°WElev: 1007ft.

Fog

43°F

6°C

Humidity	94%
Wind Speed	Calm
Barometer	30.06 in
Dewpoint	41°F (5°C)
Visibility	0.25 mi
Last update	20 Nov 10:35 am CST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

4 Miles ESE Gilman IA

Dense Fog Advisory November 20, 10:57am until November 20, 12:00pm

Click here for hazard details and duration

Dense Fog Advisory

Dense Fog Advisory November 20, 10:57am until November 20, 12:00pm
NOW until 12:00pm Thu
Dense Fog Advisory
Today
High: 50 °F
Areas Fog
then Mostly
Cloudy
Tonight
Low: 37 °F
Mostly Cloudy
Friday
High: 49 °F
Mostly Cloudy
then Slight
Chance Rain
Friday Night
Low: 30 °F
Decreasing
Clouds
Saturday
High: 53 °F
Sunny
Saturday Night
Low: 37 °F
Mostly Clear
Sunday
High: 57 °F
Sunny
Sunday Night
Low: 36 °F
Partly Cloudy

Detailed Forecast

Today

Areas of fog before 11am. Otherwise, mostly cloudy, with a high near 50. South southwest wind around 6 mph becoming light and variable in the afternoon.

Tonight

Mostly cloudy, with a low around 37. North northeast wind 3 to 7 mph.

Friday

A 20 percent chance of rain after noon. 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 30. North northeast wind around 5 mph becoming calm in the evening.

Saturday

Sunny, with a high near 53. Calm wind becoming south southwest 5 to 8 mph in the morning.

Saturday Night

Mostly clear, with a low around 37.

Sunday

Sunny, with a high near 57.