National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Decorah (KDEH)

Lat: 43.28°NLon: 91.73°WElev: 1158ft.

Overcast

68°F

20°C

Humidity 100%
Wind Speed SE 6 mph
Barometer 29.97 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 8 Aug 2:15 am CDT
Extended Forecast for

Postville IA

  • Overnight

    Overnight: Mostly cloudy, with a low around 69. South wind around 7 mph.

    Low: 69 °F

    Mostly Cloudy

  • Friday

    Friday: Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 88. Heat index values as high as 98. South wind 8 to 14 mph, with gusts as high as 23 mph.

    High: 88 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73. South wind 10 to 13 mph, with gusts as high as 22 mph.

    Low: 73 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86. Southwest wind around 11 mph, with gusts as high as 21 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm after 10pm. Mostly cloudy, with a low around 68. South wind around 6 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 68 °F

    T-storms
    Likely then
    Showers
    Likely

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 82. Southwest wind 5 to 7 mph. New rainfall amounts between a quarter and half of an inch possible.

    High: 82 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. Southwest wind around 5 mph. Chance of precipitation is 60%.

    Low: 64 °F

    Chance
    T-storms then
    Showers
    Likely

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81. Southwest wind around 5 mph.

    High: 81 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A 30 percent chance of showers, mainly before 1am. Mostly cloudy, with a low around 64. Light southwest wind.

    Low: 64 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 69. South wind around 7 mph.
Friday
Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 88. Heat index values as high as 98. South wind 8 to 14 mph, with gusts as high as 23 mph.
Friday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73. South wind 10 to 13 mph, with gusts as high as 22 mph.
Saturday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86. Southwest wind around 11 mph, with gusts as high as 21 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm after 10pm. Mostly cloudy, with a low around 68. South wind around 6 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 82. Southwest wind 5 to 7 mph. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. Southwest wind around 5 mph. Chance of precipitation is 60%.
Monday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81. Southwest wind around 5 mph.
Monday Night
A 30 percent chance of showers, mainly before 1am. Mostly cloudy, with a low around 64. Light southwest wind.
Tuesday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 81. Southwest wind 3 to 6 mph. Chance of precipitation is 20%.
Tuesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 63. South wind 3 to 5 mph.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 81. South wind 5 to 7 mph.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 64. South wind around 5 mph.
Thursday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 84. South wind 5 to 7 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Postville IA
 43.08°N 91.56°W
Last Update:
1:29 am CDT Aug 8, 2025
Forecast Valid:
2am CDT Aug 8, 2025-6pm CDT Aug 14, 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