Extreme Heat Lingers; Severe Thunderstorms for Portions of the Plains and Southeast; Heavy Rainfall Threats

Gusty winds and heavy rainfall may impact the Big Island of Hawaii as a nearby tropical system passes west of the islands. From the Southwest U.S., Rockies and across the Gulf Coast, heavy rainfall could lead to isolated flash flooding. Severe thunderstorms are expected for areas of the Plains, Gulf Coast and Southeast through Tuesday. Extreme heat lingers for the southern Plains and Southwest. Read More >

Current conditions at

Fort Madison Municipal Airport (KFSW)

Lat: 40.66°NLon: 91.33°WElev: 719ft.

A Few Clouds

72°F

22°C

Humidity 69%
Wind Speed SE 2 mph
Barometer 30.09 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 24 Aug 2:15 pm CDT
Extended Forecast for

Denmark IA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 78. Calm wind.

    High: 78 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 62. Calm wind becoming east around 5 mph.

    Low: 62 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83. South wind around 5 mph.

    High: 83 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers, mainly between 3am and 4am.  Partly cloudy, with a low around 67. Calm wind becoming southeast around 5 mph after midnight.

    Low: 67 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 64.

    Low: 64 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 61.

    Low: 61 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 78. Calm wind.
Tonight
Partly cloudy, with a low around 62. Calm wind becoming east around 5 mph.
Tuesday
Mostly sunny, with a high near 83. South wind around 5 mph.
Tuesday Night
A 30 percent chance of showers, mainly between 3am and 4am. Partly cloudy, with a low around 67. Calm wind becoming southeast around 5 mph after midnight.
Wednesday
Sunny, with a high near 85.
Wednesday Night
Clear, with a low around 64.
Thursday
Sunny, with a high near 82.
Thursday Night
Clear, with a low around 61.
Friday
Sunny, with a high near 83.
Friday Night
Partly cloudy, with a low around 64.
Saturday
Mostly sunny, with a high near 85.
Saturday Night
Partly cloudy, with a low around 69.
Sunday
Mostly sunny, with a high near 88.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Denmark IA
 40.74°N 91.35°W (Elev. 732 ft)
2:06 pm CDT Aug 24, 2026
2pm CDT Aug 24, 2026-6pm CDT Aug 30, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database