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.

Fog/Mist

36°F

2°C

Humidity 100%
Wind Speed NW 5 mph
Barometer 29.84 in
Dewpoint 36°F (2°C)
Visibility 2.50 mi
Wind Chill32°F (0°C)
Last update 26 Dec 3:35 pm CST
Extended Forecast for

Castalia IA

  • Tonight

    Tonight: Areas of dense fog before 7pm, then areas of dense fog after 9pm. Areas of freezing fog between 7pm and 9pm. Otherwise, mostly cloudy, with a low around 31. Calm wind becoming south around 6 mph after midnight.

    Low: 31 °F

    Areas
    Freezing Fog
    and Areas
    Dense Fog

  • Saturday

    Saturday: Areas of fog before 11am. Otherwise, mostly cloudy, with a high near 43. South wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 43 °F

    Areas Fog
    then Mostly
    Cloudy

  • Saturday Night

    Saturday Night: A slight chance of drizzle before midnight. Cloudy, with a steady temperature around 41. Southeast wind 5 to 8 mph becoming light and variable.

    Low: 41 °F

    Slight Chance
    Drizzle then
    Cloudy

  • Sunday

    Sunday: A chance of rain before noon, then rain and snow likely between noon and 3pm, then snow likely after 3pm. Cloudy, with a high near 40. Breezy, with a northwest wind 6 to 11 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 40 °F

    Chance Rain
    then
    Rain/Snow
    Likely and
    Breezy

  • Sunday Night

    Sunday Night: A 40 percent chance of snow. Cloudy, with a low around 7. Blustery, with a northwest wind 22 to 25 mph, with gusts as high as 37 mph. New snow accumulation of around an inch possible.

    Low: 7 °F

    Chance Snow
    and Blustery

  • Monday

    Monday: Partly sunny, with a high near 13. Blustery, with a northwest wind 17 to 24 mph, with gusts as high as 37 mph.

    High: 13 °F

    Partly Sunny
    and Blustery

  • Monday Night

    Monday Night: Partly cloudy, with a low around 4. Blustery, with a northwest wind 8 to 16 mph, with gusts as high as 24 mph.

    Low: 4 °F

    Mostly Clear
    and Blustery
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 27. West wind 8 to 13 mph, with gusts as high as 21 mph.

    High: 27 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 12. Northwest wind around 11 mph, with gusts as high as 20 mph.

    Low: 12 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Areas of dense fog before 7pm, then areas of dense fog after 9pm. Areas of freezing fog between 7pm and 9pm. Otherwise, mostly cloudy, with a low around 31. Calm wind becoming south around 6 mph after midnight.
Saturday
Areas of fog before 11am. Otherwise, mostly cloudy, with a high near 43. South wind 7 to 11 mph, with gusts as high as 20 mph.
Saturday Night
A slight chance of drizzle before midnight. Cloudy, with a steady temperature around 41. Southeast wind 5 to 8 mph becoming light and variable.
Sunday
A chance of rain before noon, then rain and snow likely between noon and 3pm, then snow likely after 3pm. Cloudy, with a high near 40. Breezy, with a northwest wind 6 to 11 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Sunday Night
A 40 percent chance of snow. Cloudy, with a low around 7. Blustery, with a northwest wind 22 to 25 mph, with gusts as high as 37 mph. New snow accumulation of around an inch possible.
Monday
Partly sunny, with a high near 13. Blustery, with a northwest wind 17 to 24 mph, with gusts as high as 37 mph.
Monday Night
Partly cloudy, with a low around 4. Blustery, with a northwest wind 8 to 16 mph, with gusts as high as 24 mph.
Tuesday
Partly sunny, with a high near 27. West wind 8 to 13 mph, with gusts as high as 21 mph.
Tuesday Night
Mostly cloudy, with a low around 12. Northwest wind around 11 mph, with gusts as high as 20 mph.
Wednesday
Mostly cloudy, with a high near 20. Northwest wind around 11 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly cloudy, with a low around -1. Northwest wind around 10 mph, with gusts as high as 18 mph.
New Year's Day
Sunny, with a high near 8. Northwest wind 8 to 10 mph.
Thursday Night
Mostly clear, with a low around -4. Northwest wind around 7 mph.
Friday
Mostly sunny, with a high near 14. Northwest wind around 7 mph becoming south in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castalia IA
 43.1°N 91.68°W
Last Update:
3:16 pm CST Dec 26, 2025
Forecast Valid:
3pm CST Dec 26, 2025-6pm CST Jan 2, 2026
 
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