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.

Overcast

50°F

10°C

Humidity 76%
Wind Speed Calm
Barometer 30.08 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 9 Oct 4:55 am CDT
Extended Forecast for

Castalia IA

  • Today

    Today: A chance of showers between 9am and noon. Partly sunny, with a high near 73. Light southeast wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    High: 73 °F

    Chance
    Showers then
    Partly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 58. Southeast wind around 8 mph.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 81. South wind 9 to 15 mph, with gusts as high as 23 mph.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 58. South wind 8 to 13 mph, with gusts as high as 22 mph.

    Low: 58 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 79. South wind 7 to 9 mph.

    High: 79 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 61. South wind around 7 mph.

    Low: 61 °F

    Partly Cloudy

  • Columbus Day

    Columbus Day: Mostly sunny, with a high near 76. Southwest wind around 7 mph.

    High: 76 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers. Partly cloudy, with a low around 56. West wind 5 to 7 mph becoming north after midnight.

    Low: 56 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 67. North wind 5 to 8 mph.

    High: 67 °F

    Mostly Sunny

Detailed Forecast

Today
A chance of showers between 9am and noon. Partly sunny, with a high near 73. Light southeast wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Mostly clear, with a low around 58. Southeast wind around 8 mph.
Saturday
Sunny, with a high near 81. South wind 9 to 15 mph, with gusts as high as 23 mph.
Saturday Night
Mostly clear, with a low around 58. South wind 8 to 13 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 79. South wind 7 to 9 mph.
Sunday Night
Partly cloudy, with a low around 61. South wind around 7 mph.
Columbus Day
Mostly sunny, with a high near 76. Southwest wind around 7 mph.
Monday Night
A 20 percent chance of showers. Partly cloudy, with a low around 56. West wind 5 to 7 mph becoming north after midnight.
Tuesday
Mostly sunny, with a high near 67. North wind 5 to 8 mph.
Tuesday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 49. Calm wind becoming east around 6 mph after midnight.
Wednesday
A 50 percent chance of showers. Partly sunny, with a high near 65. Southeast wind 7 to 13 mph, with gusts as high as 21 mph.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 52. Southeast wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Thursday
A 40 percent chance of showers. Partly sunny, with a high near 66. Breezy, with a south wind 11 to 16 mph becoming west in the afternoon. Winds could gust as high as 24 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:
5:06 am CDT Oct 9, 2026
Forecast Valid:
5am CDT Oct 9, 2026-6pm CDT Oct 15, 2026
 
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Additional Resources

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Chance of Precipitation