Hazardous Weather Conditions
Current conditions at
Decorah (KDEH)
Lat: 43.28°NLon: 91.73°WElev: 1158ft.
Freezing Fog
N/A
| Humidity | NA |
| Wind Speed | Vrbl 6 mph |
| Barometer | 30.02 in |
| Dewpoint | N/A |
| Visibility | 0.25 mi |
| Last update | 7 Aug 4:55 am CDT |
Extended Forecast for
4 Miles NE Castalia IA
Dense Fog Advisory August 7, 05:18am until August 7, 09:00am
NOW until 9:00am Fri
Dense Fog Advisory
Today
High: 82 °F
Areas Fog
then Showers
LikelyTonight
Low: 59 °F
Chance
T-storms then
Mostly ClearSaturday

High: 80 °F
Sunny
Saturday Night
Low: 62 °F
Mostly Clear
then Showers
LikelySunday

High: 83 °F
Chance
T-stormsSunday Night
Low: 66 °F
Slight Chance
T-storms then
Showers
LikelyMonday

High: 82 °F
Showers
LikelyMonday Night
Low: 64 °F
Partly Cloudy
then Chance
Showers
Detailed Forecast
Today
A chance of showers and thunderstorms between 3pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Areas of fog before 9am. Otherwise, partly sunny, with a high near 82. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 59. West wind around 7 mph.
Saturday
Sunny, with a high near 80. Light and variable wind.
Saturday Night
Showers likely and possibly a thunderstorm after 1am. Increasing clouds, with a low around 62. Calm wind becoming south around 5 mph after midnight. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 83. Light south wind. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Light and variable wind. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers likely and possibly a thunderstorm before 1pm. Mostly cloudy, with a high near 82. East wind around 7 mph becoming west in the afternoon. Chance of precipitation is 70%.
Monday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. Light northeast wind.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 79. Calm wind.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 61. Calm wind. Chance of precipitation is 20%.
Wednesday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 78. Calm wind.
Wednesday Night
Partly cloudy, with a low around 59. Calm wind.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 75. Calm wind becoming north around 5 mph.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
4 Miles NE Castalia IA
43.17°N 91.62°W
43.17°N 91.62°W
5:11 am CDT Aug 7, 2026
5am CDT Aug 7, 2026-6pm CDT Aug 13, 2026



