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

68°F

20°C

Humidity 60%
Wind Speed Calm
Barometer 29.87 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 13 Oct 2:15 pm CDT
Extended Forecast for

Castalia IA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 67. Northwest wind around 6 mph.

    High: 67 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers before 9pm. Mostly cloudy, with a low around 49. North wind 6 to 9 mph.

    Low: 49 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 64. North wind 8 to 11 mph.

    High: 64 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 49. Northeast wind 6 to 11 mph, with gusts as high as 20 mph.

    Low: 49 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers, mainly after 7am. High near 59. East wind 8 to 11 mph becoming north in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 59 °F

    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 42. Breezy, with a northwest wind 11 to 20 mph, with gusts as high as 28 mph.

    Low: 42 °F

    Slight Chance
    Showers and
    Breezy

  • Friday

    Friday: Mostly sunny, with a high near 54. Breezy, with a north wind 18 to 23 mph, with gusts as high as 34 mph.

    High: 54 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Widespread frost, mainly after 4am. Otherwise, mostly clear, with a low around 32. Northwest wind around 6 mph becoming calm in the evening.

    Low: 32 °F

    Mostly Clear
    then Frost

  • Saturday

    Saturday: Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 58. Light southwest wind increasing to 9 to 14 mph in the morning.

    High: 58 °F

    Frost then
    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 67. Northwest wind around 6 mph.
Tonight
A 20 percent chance of showers before 9pm. Mostly cloudy, with a low around 49. North wind 6 to 9 mph.
Wednesday
Partly sunny, with a high near 64. North wind 8 to 11 mph.
Wednesday Night
Mostly cloudy, with a low around 49. Northeast wind 6 to 11 mph, with gusts as high as 20 mph.
Thursday
Showers, mainly after 7am. High near 59. East wind 8 to 11 mph becoming north in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 42. Breezy, with a northwest wind 11 to 20 mph, with gusts as high as 28 mph.
Friday
Mostly sunny, with a high near 54. Breezy, with a north wind 18 to 23 mph, with gusts as high as 34 mph.
Friday Night
Widespread frost, mainly after 4am. Otherwise, mostly clear, with a low around 32. Northwest wind around 6 mph becoming calm in the evening.
Saturday
Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 58. Light southwest wind increasing to 9 to 14 mph in the morning.
Saturday Night
Clear, with a low around 42. Southwest wind 10 to 13 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 63. Breezy, with a south wind 13 to 16 mph, with gusts as high as 24 mph.
Sunday Night
Mostly cloudy, with a low around 46. Southwest wind 5 to 9 mph, with gusts as high as 20 mph.
Monday
Partly sunny, with a high near 65. Calm wind.
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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:
1:26 pm CDT Oct 13, 2026
Forecast Valid:
2pm CDT Oct 13, 2026-6pm CDT Oct 19, 2026
 
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Additional Resources

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Chance of Precipitation