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

Fort Madison Municipal Airport (KFSW)

Lat: 40.66°NLon: 91.33°WElev: 719ft.

Overcast

39°F

4°C

Humidity 81%
Wind Speed W 14 mph
Barometer 29.96 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill31°F (-1°C)
Last update 7 Mar 2:35 pm CST
Extended Forecast for

4 Miles S Denmark IA

  • This Afternoon

    This Afternoon: Partly sunny, with a steady temperature around 44. West wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 44 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 35. West wind 5 to 10 mph becoming southwest after midnight. Winds could gust as high as 20 mph.

    Low: 35 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 66. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 46. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 46 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 52.

    Low: 52 °F

    Clear

  • Tuesday

    Tuesday: Rain likely and possibly a thunderstorm after noon. Partly sunny, with a high near 78. Chance of precipitation is 60%.

    High: 78 °F

    Mostly Sunny
    then Rain
    Likely

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 39. Chance of precipitation is 90%.

    Low: 39 °F

    Rain

  • Wednesday

    Wednesday: Rain likely, mainly before noon. Mostly cloudy, with a high near 49. Chance of precipitation is 70%.

    High: 49 °F

    Rain Likely
    then Chance
    Rain

Detailed Forecast

This Afternoon
Partly sunny, with a steady temperature around 44. West wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 35. West wind 5 to 10 mph becoming southwest after midnight. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 66. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Sunday Night
Clear, with a low around 46. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 73.
Monday Night
Clear, with a low around 52.
Tuesday
Rain likely and possibly a thunderstorm after noon. Partly sunny, with a high near 78. Chance of precipitation is 60%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 39. Chance of precipitation is 90%.
Wednesday
Rain likely, mainly before noon. Mostly cloudy, with a high near 49. Chance of precipitation is 70%.
Wednesday Night
Mostly clear, with a low around 29.
Thursday
Mostly sunny, with a high near 51.
Thursday Night
Mostly cloudy, with a low around 42.
Friday
Mostly cloudy, with a high near 61.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Denmark IA
 40.7°N 91.32°W (Elev. 682 ft)
Last Update:
1:51 pm CST Mar 7, 2026
Forecast Valid:
2pm CST Mar 7, 2026-6pm CDT Mar 13, 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