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.

Overcast

77°F

25°C

Humidity 61%
Wind Speed S 15 G 21 mph
Barometer 29.74 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 15 Apr 3:15 pm CDT
Extended Forecast for

4 Miles SSW Denmark IA

  • This Afternoon

    This Afternoon: Showers and thunderstorms likely, mainly before 4pm. Mostly cloudy, with a high near 75. South wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 75 °F

    T-storms
    Likely

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 9pm. Mostly cloudy, with a low around 57. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 57 °F

    Showers
    Likely then
    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 77. West wind around 10 mph.

    High: 77 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 56. Southwest wind 5 to 10 mph becoming southeast in the evening.

    Low: 56 °F

    Mostly Clear

  • Friday

    Friday: Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 82. Chance of precipitation is 70%.

    High: 82 °F

    Mostly Sunny
    then Showers
    Likely

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 1am, then showers likely. Low around 41. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    Low: 41 °F

    T-storms then
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 53.

    High: 53 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

Detailed Forecast

This Afternoon
Showers and thunderstorms likely, mainly before 4pm. Mostly cloudy, with a high near 75. South wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Tonight
Showers and thunderstorms likely, mainly before 9pm. Mostly cloudy, with a low around 57. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Thursday
Sunny, with a high near 77. West wind around 10 mph.
Thursday Night
Mostly clear, with a low around 56. Southwest wind 5 to 10 mph becoming southeast in the evening.
Friday
Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 82. Chance of precipitation is 70%.
Friday Night
Showers and possibly a thunderstorm before 1am, then showers likely. Low around 41. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Saturday
Mostly sunny, with a high near 53.
Saturday Night
Mostly clear, with a low around 35.
Sunday
Sunny, with a high near 58.
Sunday Night
Clear, with a low around 38.
Monday
Sunny, with a high near 69.
Monday Night
Partly cloudy, with a low around 51.
Tuesday
Sunny, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Denmark IA
 40.7°N 91.35°W (Elev. 725 ft)
Last Update:
2:52 pm CDT Apr 15, 2026
Forecast Valid:
3pm CDT Apr 15, 2026-6pm CDT Apr 21, 2026
 
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