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.

Light Rain

55°F

13°C

Humidity 100%
Wind Speed S 9 G 15 mph
Barometer 29.52 in
Dewpoint 55°F (13°C)
Visibility 6.00 mi
Wind Chill53°F (12°C)
Last update 17 Jun 5:55 am CDT
Extended Forecast for

Castalia IA

  • Today

    Today: Showers and thunderstorms before 4pm, then showers and possibly a thunderstorm, mainly after 4pm. High near 71. Breezy, with a southeast wind 9 to 16 mph becoming west in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 71 °F

    Showers and
    Breezy

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 7pm. Mostly cloudy, with a low around 54. Breezy, with a northwest wind 10 to 17 mph, with gusts as high as 30 mph.

    Low: 54 °F

    Chance
    T-storms and
    Breezy then
    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of showers between 3pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 71. Northwest wind 10 to 13 mph. Chance of precipitation is 20%.

    High: 71 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 50. Northwest wind 5 to 9 mph becoming light in the evening.

    Low: 50 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 75. West wind 3 to 8 mph.

    High: 75 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: Mostly clear, with a low around 55. West wind around 5 mph becoming calm in the evening.

    Low: 55 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 78. Light west wind.

    High: 78 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 58. Calm wind becoming east 5 to 7 mph after midnight.

    Low: 58 °F

    Partly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 72. East wind 9 to 13 mph. Chance of precipitation is 60%.

    High: 72 °F

    Showers
    Likely

Detailed Forecast

Today
Showers and thunderstorms before 4pm, then showers and possibly a thunderstorm, mainly after 4pm. High near 71. Breezy, with a southeast wind 9 to 16 mph becoming west in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 7pm. Mostly cloudy, with a low around 54. Breezy, with a northwest wind 10 to 17 mph, with gusts as high as 30 mph.
Thursday
A slight chance of showers between 3pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 71. Northwest wind 10 to 13 mph. Chance of precipitation is 20%.
Thursday Night
Mostly clear, with a low around 50. Northwest wind 5 to 9 mph becoming light in the evening.
Juneteenth
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 75. West wind 3 to 8 mph.
Friday Night
Mostly clear, with a low around 55. West wind around 5 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 78. Light west wind.
Saturday Night
A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 58. Calm wind becoming east 5 to 7 mph after midnight.
Sunday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 72. East wind 9 to 13 mph. Chance of precipitation is 60%.
Sunday Night
A 40 percent chance of showers, mainly before 1am. Partly cloudy, with a low around 55. Northeast wind 8 to 13 mph.
Monday
Mostly sunny, with a high near 74. Northeast wind around 8 mph.
Monday Night
A 20 percent chance of showers. Partly cloudy, with a low around 55. Northeast wind around 6 mph becoming calm in the evening.
Tuesday
A 20 percent chance of showers. Mostly sunny, with a high near 77. Calm wind becoming west around 5 mph in the afternoon.
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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:
5:11 am CDT Jun 17, 2026
Forecast Valid:
6am CDT Jun 17, 2026-6pm CDT Jun 23, 2026
 
Forecast Discussion
 
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Additional Resources

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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