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.

Mostly Cloudy

45°F

7°C

Humidity 61%
Wind Speed SE 6 mph
Barometer 30.39 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 9 Oct 12:15 am CDT
Extended Forecast for

Castalia IA

  • Overnight

    Overnight: Clear, with a low around 40. Southeast wind 3 to 5 mph.

    Low: 40 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 66. South wind 6 to 11 mph.

    High: 66 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Increasing clouds, with a low around 52. Southeast wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 40%.

    Low: 52 °F

    Chance
    Showers

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 72. South wind around 9 mph becoming northwest in the afternoon.

    High: 72 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 42. North wind around 6 mph.

    Low: 42 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 66. North wind 5 to 7 mph becoming east in the afternoon.

    High: 66 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 47. East wind 6 to 9 mph.

    Low: 47 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers after 1pm. Partly sunny, with a high near 68. Breezy, with a southeast wind 10 to 16 mph.

    High: 68 °F

    Partly Sunny
    then Slight
    Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 54. Southeast wind 10 to 14 mph. Chance of precipitation is 30%.

    Low: 54 °F

    Chance
    Showers

Detailed Forecast

Overnight
Clear, with a low around 40. Southeast wind 3 to 5 mph.
Thursday
Sunny, with a high near 66. South wind 6 to 11 mph.
Thursday Night
A chance of showers and thunderstorms. Increasing clouds, with a low around 52. Southeast wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 40%.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 72. South wind around 9 mph becoming northwest in the afternoon.
Friday Night
Mostly clear, with a low around 42. North wind around 6 mph.
Saturday
Sunny, with a high near 66. North wind 5 to 7 mph becoming east in the afternoon.
Saturday Night
Partly cloudy, with a low around 47. East wind 6 to 9 mph.
Sunday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 68. Breezy, with a southeast wind 10 to 16 mph.
Sunday Night
A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 54. Southeast wind 10 to 14 mph. Chance of precipitation is 30%.
Columbus Day
A 20 percent chance of showers. Mostly sunny, with a high near 71. Southeast wind around 9 mph becoming northeast in the afternoon.
Monday Night
A 20 percent chance of showers. Partly cloudy, with a low around 52. Northeast wind around 6 mph.
Tuesday
A 20 percent chance of showers. Mostly sunny, with a high near 69. East wind around 7 mph.
Tuesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 53. East wind around 6 mph.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 73. Southeast wind 6 to 9 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castalia IA
 43.1°N 91.68°W
Last Update:
12:16 am CDT Oct 9, 2025
Forecast Valid:
12am CDT Oct 9, 2025-6pm CDT Oct 15, 2025
 
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Additional Resources

Radar & Satellite Image

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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