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

66°F

19°C

Humidity 56%
Wind Speed S 12 mph
Barometer 29.80 in
Dewpoint 50°F (10°C)
Visibility 9.00 mi
Last update 14 Nov 12:55 pm CST
Extended Forecast for

Castalia IA

  • This Afternoon

    This Afternoon: Sunny, with a high near 69. South wind around 11 mph, with gusts as high as 20 mph.

    High: 69 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 50. South wind 9 to 13 mph becoming west after midnight. Winds could gust as high as 23 mph.

    Low: 50 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Cloudy through mid morning, then gradual clearing, with a high near 61. Breezy, with a northwest wind 8 to 16 mph, with gusts as high as 25 mph.

    High: 61 °F

    Partly Sunny
    then Sunny
    and Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 29. Northwest wind 6 to 9 mph.

    Low: 29 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 46. Northwest wind 5 to 7 mph.

    High: 46 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 27. Light and variable wind.

    Low: 27 °F

    Partly Cloudy

  • Monday

    Monday: A slight chance of rain and snow after noon. Partly sunny, with a high near 44. Light and variable wind becoming east 5 to 8 mph in the morning. Chance of precipitation is 20%.

    High: 44 °F

    Partly Sunny
    then Slight
    Chance
    Rain/Snow

  • Monday Night

    Monday Night: A chance of rain and snow before midnight, then a chance of rain. Mostly cloudy, with a low around 30. Northeast wind around 7 mph. Chance of precipitation is 40%.

    Low: 30 °F

    Chance
    Rain/Snow
    then Chance
    Rain

  • Tuesday

    Tuesday: Mostly sunny, with a high near 41. Northeast wind 5 to 7 mph.

    High: 41 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 69. South wind around 11 mph, with gusts as high as 20 mph.
Tonight
Increasing clouds, with a low around 50. South wind 9 to 13 mph becoming west after midnight. Winds could gust as high as 23 mph.
Saturday
Cloudy through mid morning, then gradual clearing, with a high near 61. Breezy, with a northwest wind 8 to 16 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 29. Northwest wind 6 to 9 mph.
Sunday
Sunny, with a high near 46. Northwest wind 5 to 7 mph.
Sunday Night
Partly cloudy, with a low around 27. Light and variable wind.
Monday
A slight chance of rain and snow after noon. Partly sunny, with a high near 44. Light and variable wind becoming east 5 to 8 mph in the morning. Chance of precipitation is 20%.
Monday Night
A chance of rain and snow before midnight, then a chance of rain. Mostly cloudy, with a low around 30. Northeast wind around 7 mph. Chance of precipitation is 40%.
Tuesday
Mostly sunny, with a high near 41. Northeast wind 5 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 25. Light and variable wind becoming east around 5 mph after midnight.
Wednesday
Mostly sunny, with a high near 43. Southeast wind 5 to 7 mph.
Wednesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 31. Southeast wind around 7 mph.
Thursday
A 40 percent chance of rain. Mostly cloudy, with a high near 45. East wind 7 to 9 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castalia IA
 43.13°N 91.68°W
Last Update:
12:51 pm CST Nov 14, 2025
Forecast Valid:
1pm CST Nov 14, 2025-6pm CST Nov 20, 2025
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation