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

Decorah (KDEH)

Lat: 43.28°NLon: 91.73°WElev: 1158ft.

Fair

70°F

21°C

Humidity 53%
Wind Speed W 7 mph
Barometer 29.65 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 18 Oct 11:35 am CDT
Extended Forecast for

Castalia IA

  • Today

    Today: Sunny, with a high near 70. Southwest wind around 7 mph becoming west in the afternoon.

    High: 70 °F

    Sunny

  • Tonight

    Tonight: Showers likely, mainly before 1am. Cloudy, with a low around 43. Northwest wind 8 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 43 °F

    Showers
    Likely

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 58. Breezy, with a northwest wind 14 to 18 mph.

    High: 58 °F

    Becoming
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 38. West wind 5 to 7 mph becoming south after midnight.

    Low: 38 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 63. Breezy, with a south wind 10 to 16 mph becoming southwest in the afternoon.

    High: 63 °F

    Breezy.
    Mostly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 41. West wind 10 to 14 mph, with gusts as high as 22 mph.

    Low: 41 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 50. Breezy, with a west wind 14 to 20 mph, with gusts as high as 29 mph.

    High: 50 °F

    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Areas of frost after 3am. Otherwise, partly cloudy, with a low around 33. Northwest wind 6 to 11 mph, with gusts as high as 20 mph.

    Low: 33 °F

    Partly Cloudy
    then Areas
    Frost

  • Wednesday

    Wednesday: Areas of frost before 9am. Otherwise, sunny, with a high near 56. West wind 6 to 9 mph.

    High: 56 °F

    Areas Frost
    then Sunny

Detailed Forecast

Today
Sunny, with a high near 70. Southwest wind around 7 mph becoming west in the afternoon.
Tonight
Showers likely, mainly before 1am. Cloudy, with a low around 43. Northwest wind 8 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 58. Breezy, with a northwest wind 14 to 18 mph.
Sunday Night
Mostly clear, with a low around 38. West wind 5 to 7 mph becoming south after midnight.
Monday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 63. Breezy, with a south wind 10 to 16 mph becoming southwest in the afternoon.
Monday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 41. West wind 10 to 14 mph, with gusts as high as 22 mph.
Tuesday
Mostly sunny, with a high near 50. Breezy, with a west wind 14 to 20 mph, with gusts as high as 29 mph.
Tuesday Night
Areas of frost after 3am. Otherwise, partly cloudy, with a low around 33. Northwest wind 6 to 11 mph, with gusts as high as 20 mph.
Wednesday
Areas of frost before 9am. Otherwise, sunny, with a high near 56. West wind 6 to 9 mph.
Wednesday Night
Partly cloudy, with a low around 37. South wind around 5 mph.
Thursday
Patchy frost. Otherwise, sunny, with a high near 61. South wind 5 to 8 mph.
Thursday Night
Partly cloudy, with a low around 41. South wind around 6 mph.
Friday
Sunny, with a high near 64. South wind 6 to 8 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:
11:46 am CDT Oct 18, 2025
Forecast Valid:
11am CDT Oct 18, 2025-6pm CDT Oct 24, 2025
 
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Additional Resources

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Chance of Precipitation