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.

A Few Clouds

73°F

23°C

Humidity 47%
Wind Speed NW 8 mph
Barometer 29.96 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 20 Jun 3:55 pm CDT
Extended Forecast for

6 Miles SW Castalia IA

  • Tonight

    Tonight: Increasing clouds, with a low around 53. Northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 53 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Showers likely, mainly after noon. Mostly cloudy, with a high near 69. East wind 5 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 69 °F

    Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: A 30 percent chance of showers, mainly before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 53. East wind 5 to 9 mph becoming light northeast after midnight.

    Low: 53 °F

    Chance
    Showers then
    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 75. Northeast wind 5 to 7 mph.

    High: 75 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 54. Light north wind.

    Low: 54 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 75. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 75 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 56. Southwest wind 3 to 6 mph. Chance of precipitation is 70%.

    Low: 56 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 74. West wind 5 to 11 mph.

    High: 74 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53. Northwest wind 5 to 9 mph becoming calm in the evening.

    Low: 53 °F

    Partly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 53. Northwest wind 5 to 7 mph becoming calm in the evening.
Sunday
Showers likely, mainly after noon. Mostly cloudy, with a high near 69. East wind 5 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
A 30 percent chance of showers, mainly before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 53. East wind 5 to 9 mph becoming light northeast after midnight.
Monday
Mostly sunny, with a high near 75. Northeast wind 5 to 7 mph.
Monday Night
Partly cloudy, with a low around 54. Light north wind.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 75. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 56. Southwest wind 3 to 6 mph. Chance of precipitation is 70%.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 74. West wind 5 to 11 mph.
Wednesday Night
Partly cloudy, with a low around 53. Northwest wind 5 to 9 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 75. Northwest wind 3 to 6 mph.
Thursday Night
Partly cloudy, with a low around 54. Light northeast wind.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 77. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 58. Light southeast wind.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 79. Southeast wind 5 to 11 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles SW Castalia IA
 43.06°N 91.77°W
Last Update:
3:51 pm CDT Jun 20, 2026
Forecast Valid:
4pm CDT Jun 20, 2026-6pm CDT Jun 27, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation