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

77°F

25°C

Humidity 36%
Wind Speed SW 10 G 22 mph
Barometer 29.85 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 6 Oct 1:35 pm CDT
Extended Forecast for

Castalia IA

  • This Afternoon

    This Afternoon: Sunny, with a high near 75. Southwest wind around 14 mph, with gusts as high as 25 mph.

    High: 75 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 54. Southwest wind 5 to 7 mph becoming light and variable after midnight.

    Low: 54 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 72. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 72 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 49. West wind 3 to 5 mph.

    Low: 49 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 66. Light northwest wind.

    High: 66 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 50. Calm wind.

    Low: 50 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm. Mostly sunny, with a high near 69. Calm wind becoming south 5 to 9 mph in the morning. Chance of precipitation is 20%.

    High: 69 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: Mostly clear, with a low around 58. South wind 8 to 10 mph, with gusts as high as 21 mph.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 78. Breezy, with a south wind 13 to 18 mph, with gusts as high as 26 mph.

    High: 78 °F

    Sunny then
    Sunny and
    Breezy

Detailed Forecast

This Afternoon
Sunny, with a high near 75. Southwest wind around 14 mph, with gusts as high as 25 mph.
Tonight
Mostly clear, with a low around 54. Southwest wind 5 to 7 mph becoming light and variable after midnight.
Wednesday
Sunny, with a high near 72. Calm wind becoming west 5 to 7 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 49. West wind 3 to 5 mph.
Thursday
Mostly sunny, with a high near 66. Light northwest wind.
Thursday Night
Partly cloudy, with a low around 50. Calm wind.
Friday
A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm. Mostly sunny, with a high near 69. Calm wind becoming south 5 to 9 mph in the morning. Chance of precipitation is 20%.
Friday Night
Mostly clear, with a low around 58. South wind 8 to 10 mph, with gusts as high as 21 mph.
Saturday
Sunny, with a high near 78. Breezy, with a south wind 13 to 18 mph, with gusts as high as 26 mph.
Saturday Night
Mostly clear, with a low around 60. Breezy, with a south wind 10 to 17 mph, with gusts as high as 26 mph.
Sunday
Sunny, with a high near 76. South wind 9 to 11 mph.
Sunday Night
Partly cloudy, with a low around 56. South wind 6 to 8 mph.
Columbus Day
A 30 percent chance of showers. Partly sunny, with a high near 71. Southeast wind 6 to 9 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Castalia IA
 43.13°N 91.68°W
Last Update:
1:26 pm CDT Oct 6, 2026
Forecast Valid:
2pm CDT Oct 6, 2026-6pm CDT Oct 12, 2026
 
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Additional Resources

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Chance of Precipitation