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.

Overcast

37°F

3°C

Humidity 100%
Wind Speed W 10 G 20 mph
Barometer 29.86 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 4 Apr 10:35 am CDT
Extended Forecast for

Castalia IA

  • Today

    Today: A 20 percent chance of showers after 4pm. Mostly cloudy, with a high near 42. Breezy, with a west wind 17 to 20 mph, with gusts as high as 29 mph.

    High: 42 °F

    Breezy.
    Cloudy then
    Slight Chance
    Showers

  • Tonight

    Tonight: A 10 percent chance of showers before 7pm. Mostly cloudy, with a low around 30. Breezy, with a northwest wind 16 to 20 mph, with gusts as high as 30 mph.

    Low: 30 °F

    Slight Chance
    Showers and
    Breezy

  • Sunday

    Sunday: Isolated showers after 1pm. Mostly sunny, with a high near 50. Northwest wind around 14 mph. Chance of precipitation is 20%.

    High: 50 °F

    Mostly Sunny
    then Isolated
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 31. Northwest wind around 11 mph, with gusts as high as 20 mph.

    Low: 31 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 42. Breezy, with a northwest wind 11 to 16 mph, with gusts as high as 24 mph.

    High: 42 °F

    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 20. Northeast wind 5 to 14 mph.

    Low: 20 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 42. Light and variable wind becoming south 5 to 9 mph in the morning.

    High: 42 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of rain and snow showers. Mostly cloudy, with a low around 33. Breezy, with a south wind 11 to 18 mph. Chance of precipitation is 50%.

    Low: 33 °F

    Chance
    Rain/Snow and
    Breezy

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 63. Breezy, with a south wind 20 to 24 mph, with gusts as high as 33 mph. Chance of precipitation is 40%.

    High: 63 °F

    Chance
    Showers and
    Breezy

Detailed Forecast

Today
A 20 percent chance of showers after 4pm. Mostly cloudy, with a high near 42. Breezy, with a west wind 17 to 20 mph, with gusts as high as 29 mph.
Tonight
A 10 percent chance of showers before 7pm. Mostly cloudy, with a low around 30. Breezy, with a northwest wind 16 to 20 mph, with gusts as high as 30 mph.
Sunday
Isolated showers after 1pm. Mostly sunny, with a high near 50. Northwest wind around 14 mph. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 31. Northwest wind around 11 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 42. Breezy, with a northwest wind 11 to 16 mph, with gusts as high as 24 mph.
Monday Night
Mostly clear, with a low around 20. Northeast wind 5 to 14 mph.
Tuesday
Mostly sunny, with a high near 42. Light and variable wind becoming south 5 to 9 mph in the morning.
Tuesday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 33. Breezy, with a south wind 11 to 18 mph. Chance of precipitation is 50%.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 63. Breezy, with a south wind 20 to 24 mph, with gusts as high as 33 mph. Chance of precipitation is 40%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 43. Breezy, with a southwest wind 16 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 50%.
Thursday
A 50 percent chance of showers. Partly sunny, with a high near 58. Northwest wind around 14 mph becoming southeast in the afternoon.
Thursday Night
Showers likely. Mostly cloudy, with a low around 40. East wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Friday
Showers likely. Mostly cloudy, with a high near 58. Southeast wind around 14 mph. Chance of precipitation is 70%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Castalia IA
 43.1°N 91.68°W
Last Update:
4:56 am CDT Apr 4, 2026
Forecast Valid:
10am CDT Apr 4, 2026-6pm CDT Apr 10, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation