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

N/A

Humidity NA
Wind Speed Vrbl 6 mph
Barometer 30.00 in
Dewpoint N/A
Visibility 10.00 mi
Last update 24 Jul 11:35 pm CDT
Extended Forecast for

3 Miles SE Castalia IA

Extreme Heat Watch July 26, 12:00pm until July 27, 09:00pm
Click here for hazard details and duration
Extreme Heat Watch

  • Tonight

    Tonight: Increasing clouds, with a steady temperature around 67. South wind around 7 mph.

    Low: 67 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Cloudy, then gradually becoming mostly sunny, with a high near 86. Southwest wind around 7 mph.

    High: 86 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms between 1am and 2am. Increasing clouds, with a low around 71. South wind 3 to 5 mph. Chance of precipitation is 20%.

    Low: 71 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Sunday

    Sunday: Cloudy, then gradually becoming mostly sunny, with a high near 90. Heat index values as high as 100. Southwest wind 5 to 9 mph.

    High: 90 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: A chance of showers, with thunderstorms also possible after 10pm. Partly cloudy, with a low around 73. Southwest wind 7 to 9 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 73 °F

    Chance
    Showers

  • Monday

    Monday: Sunny, with a high near 91. Southwest wind around 9 mph becoming northwest in the afternoon.

    High: 91 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 69. North wind 5 to 8 mph.

    Low: 69 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 88. North wind 3 to 5 mph.

    High: 88 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67. Light northeast wind.

    Low: 67 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a steady temperature around 67. South wind around 7 mph.
Saturday
Cloudy, then gradually becoming mostly sunny, with a high near 86. Southwest wind around 7 mph.
Saturday Night
A slight chance of showers and thunderstorms between 1am and 2am. Increasing clouds, with a low around 71. South wind 3 to 5 mph. Chance of precipitation is 20%.
Sunday
Cloudy, then gradually becoming mostly sunny, with a high near 90. Heat index values as high as 100. Southwest wind 5 to 9 mph.
Sunday Night
A chance of showers, with thunderstorms also possible after 10pm. Partly cloudy, with a low around 73. Southwest wind 7 to 9 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
Sunny, with a high near 91. Southwest wind around 9 mph becoming northwest in the afternoon.
Monday Night
Mostly clear, with a low around 69. North wind 5 to 8 mph.
Tuesday
Mostly sunny, with a high near 88. North wind 3 to 5 mph.
Tuesday Night
Mostly clear, with a low around 67. Light northeast wind.
Wednesday
Sunny, with a high near 87. Light east wind.
Wednesday Night
Mostly clear, with a low around 67. Calm wind.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67. Light south wind.
Friday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 85. West wind 5 to 7 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Castalia IA
 43.08°N 91.62°W
Last Update:
8:46 pm CDT Jul 24, 2026
Forecast Valid:
11pm CDT Jul 24, 2026-6pm CDT Jul 31, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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