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.

Mostly Cloudy

68°F

20°C

Humidity 94%
Wind Speed S 8 mph
Barometer 29.79 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 16 Jun 11:35 pm CDT
Extended Forecast for

Castalia IA

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a steady temperature around 68. Southwest wind around 8 mph.

    Low: 68 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 82. Northwest wind around 7 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 62. North wind around 5 mph becoming calm. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 62 °F

    Showers
    Likely then
    T-storms

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 76. Northeast wind 6 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.

    High: 76 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 58. North wind 6 to 8 mph becoming west after midnight.

    Low: 58 °F

    Slight Chance
    T-storms

  • Juneteenth

    Juneteenth: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 83. West wind 6 to 9 mph.

    High: 83 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms. Mostly clear, with a low around 63. Southwest wind around 7 mph.

    Low: 63 °F

    Chance
    T-storms

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 84. South wind 8 to 15 mph.

    High: 84 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72. South wind around 15 mph, with gusts as high as 24 mph.

    Low: 72 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a steady temperature around 68. Southwest wind around 8 mph.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 82. Northwest wind around 7 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers and possibly a thunderstorm. Low around 62. North wind around 5 mph becoming calm. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 76. Northeast wind 6 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.
Wednesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 58. North wind 6 to 8 mph becoming west after midnight.
Juneteenth
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 83. West wind 6 to 9 mph.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly clear, with a low around 63. Southwest wind around 7 mph.
Friday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 84. South wind 8 to 15 mph.
Friday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72. South wind around 15 mph, with gusts as high as 24 mph.
Saturday
Sunny, with a high near 91. Southwest wind around 15 mph, with gusts as high as 23 mph.
Saturday Night
Mostly clear, with a low around 74. South wind 11 to 14 mph, with gusts as high as 24 mph.
Sunday
Sunny, with a high near 90. Breezy, with a south wind 14 to 18 mph, with gusts as high as 29 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 73. Breezy, with a south wind 14 to 16 mph, with gusts as high as 24 mph.
Monday
A 50 percent chance of showers and thunderstorms. Sunny, with a high near 86. Southwest wind around 14 mph, with gusts as high as 22 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:
11:14 pm CDT Jun 16, 2025
Forecast Valid:
11pm CDT Jun 16, 2025-6pm CDT Jun 23, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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