Current conditions at

Decorah (KDEH)

Lat: 43.28°NLon: 91.73°WElev: 1158ft.

Fair

28°F

-2°C

Humidity 69%
Wind Speed SW 8 G 14 mph
Barometer 29.46 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 24 Feb 1:15 pm CST
Extended Forecast for

Castalia IA

  • This Afternoon

    This Afternoon: A 20 percent chance of snow before 2pm.  Mostly cloudy, with a high near 32. South wind 8 to 11 mph becoming west. Winds could gust as high as 23 mph.

    High: 32 °F

    Slight Chance
    Snow

  • Tonight

    Tonight: Mostly cloudy during the early evening, then becoming mostly clear, with a low around 13. Wind chill values as low as zero. Northwest wind 11 to 13 mph, with gusts as high as 29 mph.

    Low: 13 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 23. Wind chill values as low as -1. Northwest wind 5 to 13 mph, with gusts as high as 25 mph.

    High: 23 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow after midnight.  Partly cloudy, with a low around 11. Light and variable wind.

    Low: 11 °F

    Partly Cloudy
    then Slight
    Chance Snow

  • Thursday

    Thursday: Mostly sunny, with a high near 35. Southwest wind 5 to 9 mph.

    High: 35 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 24. Southwest wind 6 to 9 mph.

    Low: 24 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 47. Southwest wind 9 to 13 mph, with gusts as high as 21 mph.

    High: 47 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 21. West wind around 10 mph becoming north after midnight. Winds could gust as high as 18 mph.

    Low: 21 °F

    Partly Cloudy

  • Saturday

    Saturday: A 40 percent chance of snow.  Partly sunny, with a high near 27. North wind around 10 mph.

    High: 27 °F

    Chance Snow

Detailed Forecast

This Afternoon
A 20 percent chance of snow before 2pm. Mostly cloudy, with a high near 32. South wind 8 to 11 mph becoming west. Winds could gust as high as 23 mph.
Tonight
Mostly cloudy during the early evening, then becoming mostly clear, with a low around 13. Wind chill values as low as zero. Northwest wind 11 to 13 mph, with gusts as high as 29 mph.
Wednesday
Mostly sunny, with a high near 23. Wind chill values as low as -1. Northwest wind 5 to 13 mph, with gusts as high as 25 mph.
Wednesday Night
A 20 percent chance of snow after midnight. Partly cloudy, with a low around 11. Light and variable wind.
Thursday
Mostly sunny, with a high near 35. Southwest wind 5 to 9 mph.
Thursday Night
Mostly clear, with a low around 24. Southwest wind 6 to 9 mph.
Friday
Sunny, with a high near 47. Southwest wind 9 to 13 mph, with gusts as high as 21 mph.
Friday Night
Partly cloudy, with a low around 21. West wind around 10 mph becoming north after midnight. Winds could gust as high as 18 mph.
Saturday
A 40 percent chance of snow. Partly sunny, with a high near 27. North wind around 10 mph.
Saturday Night
Partly cloudy, with a low around 10. North wind 7 to 9 mph.
Sunday
A 30 percent chance of snow. Mostly sunny, with a high near 25. East wind around 7 mph.
Sunday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 12. East wind around 6 mph.
Monday
Partly sunny, with a high near 30. East wind 6 to 9 mph.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Castalia IA
 43.1°N 91.68°W
1:27 pm CST Feb 24, 2026
1pm CST Feb 24, 2026-6pm CST Mar 2, 2026
 
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