National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Decorah (KDEH)

Lat: 43.28°NLon: 91.73°WElev: 1158ft.

Light Snow

21°F

-6°C

Humidity 93%
Wind Speed NW 13 G 20 mph
Barometer 30.03 in
Dewpoint 19°F (-7°C)
Visibility 2.50 mi
Wind Chill8°F (-13°C)
Last update 10 Jan 5:55 pm CST
Extended Forecast for

Castalia IA

  • Tonight

    Tonight: Scattered snow showers, mainly before 1am. Mostly cloudy, with a low around 16. Blustery, with a northwest wind 16 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 50%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 16 °F

    Scattered
    Snow Showers
    and Blustery

  • Sunday

    Sunday: Mostly sunny, with a high near 27. Northwest wind 8 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 28 mph.

    High: 27 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 24. Southwest wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 24 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 40. West wind around 8 mph.

    High: 40 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 31. Southwest wind 7 to 13 mph, with gusts as high as 21 mph.

    Low: 31 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 44. Breezy, with a west wind 13 to 16 mph, with gusts as high as 25 mph.

    High: 44 °F

    Partly Sunny
    then Partly
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 23. Northwest wind around 14 mph, with gusts as high as 22 mph.

    Low: 23 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 26. North wind 11 to 14 mph, with gusts as high as 23 mph.

    High: 26 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 15. North wind 6 to 10 mph becoming southwest after midnight.

    Low: 15 °F

    Partly Cloudy

Detailed Forecast

Tonight
Scattered snow showers, mainly before 1am. Mostly cloudy, with a low around 16. Blustery, with a northwest wind 16 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 50%. Total nighttime snow accumulation of less than a half inch possible.
Sunday
Mostly sunny, with a high near 27. Northwest wind 8 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 28 mph.
Sunday Night
Partly cloudy, with a low around 24. Southwest wind 8 to 10 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 40. West wind around 8 mph.
Monday Night
Mostly cloudy, with a low around 31. Southwest wind 7 to 13 mph, with gusts as high as 21 mph.
Tuesday
Partly sunny, with a high near 44. Breezy, with a west wind 13 to 16 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 23. Northwest wind around 14 mph, with gusts as high as 22 mph.
Wednesday
Partly sunny, with a high near 26. North wind 11 to 14 mph, with gusts as high as 23 mph.
Wednesday Night
Partly cloudy, with a low around 15. North wind 6 to 10 mph becoming southwest after midnight.
Thursday
A 30 percent chance of snow after noon. Partly sunny, with a high near 32. South wind 6 to 11 mph, with gusts as high as 20 mph.
Thursday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 25. South wind around 11 mph becoming west after midnight. Winds could gust as high as 20 mph.
Friday
A 40 percent chance of snow. Mostly cloudy, with a high near 30. Blustery, with a northwest wind 11 to 16 mph, with gusts as high as 24 mph.
Friday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 12. Northwest wind around 14 mph, with gusts as high as 22 mph.
Saturday
Mostly cloudy, with a high near 18. Northwest wind 11 to 14 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:
5:16 pm CST Jan 10, 2026
Forecast Valid:
6pm CST Jan 10, 2026-6pm CST Jan 17, 2026
 
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