National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Fort Madison Municipal Airport (KFSW)

Lat: 40.66°NLon: 91.33°WElev: 719ft.

Light Rain Fog

39°F

4°C

Humidity 100%
Wind Speed SW 3 mph
Barometer 29.98 in
Dewpoint 39°F (4°C)
Visibility 0.15 mi
Last update 15 Feb 7:55 am CST
Extended Forecast for

4 Miles W Donnellson IA

Dense Fog Advisory until February 15, 10:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory until February 15, 10:00am

    NOW until 10:00am Sun

    Dense Fog Advisory

  • Today

    High: 60 °F

    Patchy Dense
    Fog then
    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 40. Light and variable wind becoming southwest 5 to 10 mph in the evening.

    Low: 40 °F

    Increasing
    Clouds

  • Washington's Birthday

    Washington's Birthday: Mostly cloudy, then gradually becoming sunny, with a high near 65. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 65 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 44. South wind around 5 mph.

    Low: 44 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain after midnight. Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy
    then Chance
    Rain

  • Wednesday

    Wednesday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

Detailed Forecast

Today
Patchy dense fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 60. West wind around 5 mph.
Tonight
Increasing clouds, with a low around 40. Light and variable wind becoming southwest 5 to 10 mph in the evening.
Washington's Birthday
Mostly cloudy, then gradually becoming sunny, with a high near 65. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly cloudy, with a low around 44. South wind around 5 mph.
Tuesday
Partly sunny, with a high near 66.
Tuesday Night
A 30 percent chance of rain after midnight. Partly cloudy, with a low around 52.
Wednesday
Sunny, with a high near 65.
Wednesday Night
Partly cloudy, with a low around 36.
Thursday
A 30 percent chance of rain after noon. Mostly sunny, with a high near 59.
Thursday Night
A 30 percent chance of rain before midnight. Partly cloudy, with a low around 30.
Friday
Partly sunny, with a high near 42.
Friday Night
Partly cloudy, with a low around 23.
Saturday
Mostly sunny, with a high near 41.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Donnellson IA
 40.64°N 91.64°W (Elev. 650 ft)
Last Update:
7:37 am CST Feb 15, 2026
Forecast Valid:
8am CST Feb 15, 2026-6pm CST Feb 21, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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