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.

Partly Cloudy

43°F

6°C

Humidity 66%
Wind Speed N 12 mph
Barometer 29.79 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 10 Mar 5:15 am CDT
Extended Forecast for

Castalia IA

  • Today

    Today: Mostly sunny, with a high near 54. East wind 10 to 13 mph, with gusts as high as 21 mph.

    High: 54 °F

    Mostly Sunny

  • Tonight

    Tonight: A 30 percent chance of showers, mainly between 3am and 5am. Mostly cloudy, with a low around 31. North wind 11 to 13 mph.

    Low: 31 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of rain and snow showers before 8am, then a chance of snow showers between 8am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 40. Breezy, with a north wind 14 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    High: 40 °F

    Breezy.
    Chance
    Rain/Snow
    then Chance
    Snow Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 24. Northwest wind 5 to 11 mph.

    Low: 24 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 46. Southwest wind 5 to 15 mph, with gusts as high as 24 mph.

    High: 46 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Rain likely before 4am, then a chance of rain and snow. Mostly cloudy, with a low around 31. Breezy, with a south wind 15 to 21 mph becoming west after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 31 °F

    Breezy. Rain
    Likely then
    Rain/Snow
    Likely

  • Friday

    Friday: A 30 percent chance of snow before 7am. Partly sunny, with a high near 42. Breezy, with a northwest wind 13 to 21 mph, with gusts as high as 29 mph.

    High: 42 °F

    Breezy.
    Chance Snow
    then Partly
    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of snow showers after 1am. Mostly cloudy, with a low around 27. Northwest wind around 6 mph becoming southeast after midnight.

    Low: 27 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • Saturday

    Saturday: A chance of snow showers before 1pm, then a chance of rain showers. Cloudy, with a high near 44. Southeast wind 8 to 11 mph. Chance of precipitation is 40%.

    High: 44 °F

    Chance Snow
    Showers then
    Chance
    Rain/Snow

Detailed Forecast

Today
Mostly sunny, with a high near 54. East wind 10 to 13 mph, with gusts as high as 21 mph.
Tonight
A 30 percent chance of showers, mainly between 3am and 5am. Mostly cloudy, with a low around 31. North wind 11 to 13 mph.
Wednesday
A chance of rain and snow showers before 8am, then a chance of snow showers between 8am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 40. Breezy, with a north wind 14 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Wednesday Night
Mostly clear, with a low around 24. Northwest wind 5 to 11 mph.
Thursday
Partly sunny, with a high near 46. Southwest wind 5 to 15 mph, with gusts as high as 24 mph.
Thursday Night
Rain likely before 4am, then a chance of rain and snow. Mostly cloudy, with a low around 31. Breezy, with a south wind 15 to 21 mph becoming west after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Friday
A 30 percent chance of snow before 7am. Partly sunny, with a high near 42. Breezy, with a northwest wind 13 to 21 mph, with gusts as high as 29 mph.
Friday Night
A 20 percent chance of snow showers after 1am. Mostly cloudy, with a low around 27. Northwest wind around 6 mph becoming southeast after midnight.
Saturday
A chance of snow showers before 1pm, then a chance of rain showers. Cloudy, with a high near 44. Southeast wind 8 to 11 mph. Chance of precipitation is 40%.
Saturday Night
Rain and snow showers likely, mainly after 1am. Cloudy, with a low around 27. Blustery, with a northeast wind 10 to 16 mph. Chance of precipitation is 70%.
Sunday
Rain and snow showers likely. Cloudy, with a high near 32. Breezy, with a north wind 17 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 70%.
Sunday Night
A 20 percent chance of snow showers. Mostly cloudy, with a low around 11. Blustery, with a northwest wind 15 to 21 mph, with gusts as high as 29 mph.
Monday
Mostly sunny, with a high near 22. Northwest wind 11 to 14 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castalia IA
 43.13°N 91.68°W
Last Update:
3:57 am CDT Mar 10, 2026
Forecast Valid:
5am CDT Mar 10, 2026-6pm CDT Mar 16, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation