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

Decorah (KDEH)

Lat: 43.28°NLon: 91.73°WElev: 1158ft.

Fair

61°F

16°C

Humidity 48%
Wind Speed Vrbl 6 mph
Barometer 29.94 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 9 Nov 4:35 pm CST
Extended Forecast for

Castalia IA

  • Tonight

    Tonight: Mostly clear, with a low around 37. West wind around 5 mph becoming light and variable after midnight.

    Low: 37 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 58. Light north wind.

    High: 58 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 39. Calm wind.

    Low: 39 °F

    Mostly Cloudy

  • Veterans Day

    Veterans Day: A 30 percent chance of showers before noon. Partly sunny, with a high near 51. Calm wind becoming north 5 to 9 mph in the morning.

    High: 51 °F

    Chance
    Showers then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 33. North wind around 7 mph.

    Low: 33 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 41. North wind 7 to 11 mph.

    High: 41 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 25. North wind 3 to 7 mph.

    Low: 25 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 41. North wind around 6 mph becoming calm in the afternoon.

    High: 41 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 25. Calm wind.

    Low: 25 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 37. West wind around 5 mph becoming light and variable after midnight.
Tuesday
Increasing clouds, with a high near 58. Light north wind.
Tuesday Night
Mostly cloudy, with a low around 39. Calm wind.
Veterans Day
A 30 percent chance of showers before noon. Partly sunny, with a high near 51. Calm wind becoming north 5 to 9 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 33. North wind around 7 mph.
Thursday
Partly sunny, with a high near 41. North wind 7 to 11 mph.
Thursday Night
Partly cloudy, with a low around 25. North wind 3 to 7 mph.
Friday
Mostly sunny, with a high near 41. North wind around 6 mph becoming calm in the afternoon.
Friday Night
Mostly clear, with a low around 25. Calm wind.
Saturday
Sunny, with a high near 45. Calm wind.
Saturday Night
Mostly clear, with a low around 29. Light southeast wind.
Sunday
Mostly sunny, with a high near 49. Southeast wind 3 to 7 mph.
Sunday Night
Partly cloudy, with a low around 38. Light southeast wind.
Monday
Mostly sunny, with a high near 54. Southeast wind 3 to 7 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Castalia IA
 43.1°N 91.68°W
Last Update:
12:26 pm CST Nov 9, 2026
Forecast Valid:
4pm CST Nov 9, 2026-6pm CST Nov 16, 2026
 
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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