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.

Fair

43°F

6°C

Humidity 46%
Wind Speed SW 6 mph
Barometer 30.15 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 19 Apr 12:55 am CDT
Extended Forecast for

Donnellson IA

  • Overnight

    Overnight: Areas of frost after 3am. Otherwise, mostly clear, with a low around 35. West wind around 5 mph.

    Low: 35 °F

    Areas Frost

  • Sunday

    Sunday: Widespread frost, mainly before 7am. Otherwise, increasing clouds, with a high near 58. West wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 35 mph.

    High: 58 °F

    Frost then
    Partly Sunny

  • Sunday Night

    Sunday Night: Widespread frost, mainly after 5am. Otherwise, mostly clear, with a low around 33. North wind 5 to 10 mph becoming east after midnight.

    Low: 33 °F

    Mostly Clear
    then Frost

  • Monday

    Monday: Widespread frost before 8am. Otherwise, sunny, with a high near 63. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 63 °F

    Frost then
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

Detailed Forecast

Overnight
Areas of frost after 3am. Otherwise, mostly clear, with a low around 35. West wind around 5 mph.
Sunday
Widespread frost, mainly before 7am. Otherwise, increasing clouds, with a high near 58. West wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 35 mph.
Sunday Night
Widespread frost, mainly after 5am. Otherwise, mostly clear, with a low around 33. North wind 5 to 10 mph becoming east after midnight.
Monday
Widespread frost before 8am. Otherwise, sunny, with a high near 63. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 50.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
Mostly clear, with a low around 55.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Partly cloudy, with a low around 59.
Thursday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 80.
Thursday Night
Showers likely. Mostly cloudy, with a low around 57. Chance of precipitation is 70%.
Friday
Showers likely. Mostly cloudy, with a high near 68. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 43.
Saturday
Mostly sunny, with a high near 63.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Donnellson IA
 40.64°N 91.56°W (Elev. 705 ft)
Last Update:
11:51 pm CDT Apr 18, 2026
Forecast Valid:
1am CDT Apr 19, 2026-6pm CDT Apr 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation