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

73°F

23°C

Humidity 83%
Wind Speed SW 8 G 15 mph
Barometer 29.77 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 18 May 3:55 pm CDT
Extended Forecast for

Ossian IA

  • Tonight

    Tonight: Showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 4am, then a chance of showers after 4am. Low around 55. South wind 11 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 55 °F

    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers, mainly before 7am. Mostly cloudy, with a high near 60. Breezy, with a northwest wind around 17 mph, with gusts as high as 25 mph.

    High: 60 °F

    Breezy.
    Chance
    Showers then
    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, then gradually becoming clear, with a low around 40. Northwest wind 7 to 14 mph, with gusts as high as 22 mph.

    Low: 40 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Increasing clouds, with a high near 59. Northeast wind 5 to 8 mph.

    High: 59 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 41. East wind 3 to 7 mph.

    Low: 41 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 60. East wind 8 to 10 mph.

    High: 60 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 44. East wind around 10 mph, with gusts as high as 18 mph.

    Low: 44 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 50 percent chance of showers. Mostly cloudy, with a high near 61. East wind around 11 mph, with gusts as high as 20 mph.

    High: 61 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 40 percent chance of showers, mainly before 1am. Mostly cloudy, with a low around 46. East wind 5 to 10 mph, with gusts as high as 18 mph.

    Low: 46 °F

    Chance
    Showers

Detailed Forecast

Tonight
Showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 4am, then a chance of showers after 4am. Low around 55. South wind 11 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday
A 30 percent chance of showers, mainly before 7am. Mostly cloudy, with a high near 60. Breezy, with a northwest wind around 17 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, then gradually becoming clear, with a low around 40. Northwest wind 7 to 14 mph, with gusts as high as 22 mph.
Wednesday
Increasing clouds, with a high near 59. Northeast wind 5 to 8 mph.
Wednesday Night
Mostly cloudy, with a low around 41. East wind 3 to 7 mph.
Thursday
Partly sunny, with a high near 60. East wind 8 to 10 mph.
Thursday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 44. East wind around 10 mph, with gusts as high as 18 mph.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 61. East wind around 11 mph, with gusts as high as 20 mph.
Friday Night
A 40 percent chance of showers, mainly before 1am. Mostly cloudy, with a low around 46. East wind 5 to 10 mph, with gusts as high as 18 mph.
Saturday
Partly sunny, with a high near 70. East wind around 7 mph becoming south in the afternoon.
Saturday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 51. Southeast wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 77. Southwest wind around 6 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 56. South wind 3 to 6 mph.
Memorial Day
Mostly sunny, with a high near 82. South wind 6 to 8 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ossian IA
 43.15°N 91.77°W
Last Update:
1:27 pm CDT May 18, 2026
Forecast Valid:
4pm CDT May 18, 2026-6pm CDT May 25, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation