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

Rapid Warm-Up Forecast Across Much of the Lower 48 Today and Tuesday

Most of the U.S. starts the week calm and unseasonably warm. The Heartland will be warmest, with highs 25–30° above average. Only the Gulf Coast stays chilly. Rain today is limited to western Washington while lake effect snow continues east of Lake Ontario. Cooler air returns after Tuesday, bringing a wintry mix to the Midwest and Northeast by Wednesday. Read More >

Current conditions at

Fort Madison Municipal Airport (KFSW)

Lat: 40.66°NLon: 91.33°WElev: 719ft.

Fair

30°F

-1°C

Humidity 64%
Wind Speed S 9 mph
Barometer 30.20 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 12 Jan 7:55 am CST
Extended Forecast for

Denmark IA

  • Today

    Today: Mostly sunny, with a high near 46. Southwest wind 5 to 10 mph.

    High: 46 °F

    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 34. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 34 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, with a high near 53. West wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 53 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 30. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 30 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 35.

    High: 35 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 15.

    Low: 15 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 29.

    High: 29 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of snow before midnight. Mostly cloudy, with a low around 25.

    Low: 25 °F

    Chance Snow
    then Mostly
    Cloudy

  • Friday

    Friday: A 50 percent chance of snow. Mostly cloudy, with a high near 37.

    High: 37 °F

    Chance Snow

Detailed Forecast

Today
Mostly sunny, with a high near 46. Southwest wind 5 to 10 mph.
Tonight
Increasing clouds, with a low around 34. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, with a high near 53. West wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 30. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday
Mostly cloudy, with a high near 35.
Wednesday Night
Mostly clear, with a low around 15.
Thursday
Mostly sunny, with a high near 29.
Thursday Night
A 40 percent chance of snow before midnight. Mostly cloudy, with a low around 25.
Friday
A 50 percent chance of snow. Mostly cloudy, with a high near 37.
Friday Night
Mostly cloudy, with a low around 15.
Saturday
Mostly cloudy, with a high near 20.
Saturday Night
Partly cloudy, with a low around 5.
Sunday
Mostly sunny, with a high near 23.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Denmark IA
 40.74°N 91.32°W (Elev. 699 ft)
Last Update:
7:57 am CST Jan 12, 2026
Forecast Valid:
8am CST Jan 12, 2026-6pm CST Jan 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation