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

59°F

15°C

Humidity 94%
Wind Speed NE 7 mph
Barometer 30.15 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 22 Sep 3:35 am CDT
Extended Forecast for

Donnellson IA

  • Overnight

    Overnight: A 40 percent chance of showers. Patchy fog after 5am. Otherwise, cloudy, with a steady temperature around 59. Northeast wind around 10 mph.

    Low: 59 °F

    Chance
    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: Showers likely, mainly before 3pm. Patchy fog before 9am. Otherwise, cloudy, with a high near 63. Northeast wind around 10 mph. Chance of precipitation is 60%.

    High: 63 °F

    Showers
    Likely and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 49. Northeast wind around 5 mph.

    Low: 49 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 69. Northeast wind around 5 mph.

    High: 69 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 69.

    High: 69 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 56.

    Low: 56 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 72.

    High: 72 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 40 percent chance of showers. Patchy fog after 5am. Otherwise, cloudy, with a steady temperature around 59. Northeast wind around 10 mph.
Tuesday
Showers likely, mainly before 3pm. Patchy fog before 9am. Otherwise, cloudy, with a high near 63. Northeast wind around 10 mph. Chance of precipitation is 60%.
Tuesday Night
Mostly cloudy, with a low around 49. Northeast wind around 5 mph.
Wednesday
Mostly sunny, with a high near 69. Northeast wind around 5 mph.
Wednesday Night
Partly cloudy, with a low around 54.
Thursday
Partly sunny, with a high near 69.
Thursday Night
Mostly cloudy, with a low around 56.
Friday
Partly sunny, with a high near 72.
Friday Night
Mostly cloudy, with a low around 55.
Saturday
A 50 percent chance of showers. Mostly cloudy, with a high near 69.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 57.
Sunday
Partly sunny, with a high near 77.
Sunday Night
Partly cloudy, with a low around 59.
Monday
Mostly sunny, with a high near 80.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Donnellson IA
 40.64°N 91.56°W (Elev. 705 ft)
Last Update:
3:06 am CDT Sep 22, 2026
Forecast Valid:
3am CDT Sep 22, 2026-6pm CDT Sep 28, 2026
 
Forecast Discussion
 
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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation