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

59°F

15°C

Humidity 100%
Wind Speed Calm
Barometer 30.08 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 27 Aug 11:55 pm CDT
Extended Forecast for

Calmar IA

  • Overnight

    Overnight: Mostly clear, with a low around 55. Light northwest wind.

    Low: 55 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 81. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: A 10 percent chance of showers after 5am. Mostly cloudy, with a low around 64. Light south wind increasing to 5 to 9 mph in the evening.

    Low: 64 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 78. South wind 9 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 68. South wind 13 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

    Low: 68 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Breezy, with a south wind 13 to 16 mph, with gusts as high as 24 mph.

    High: 87 °F

    Breezy.
    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 72. South wind 8 to 11 mph, with gusts as high as 20 mph.

    Low: 72 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: A 30 percent chance of showers before 1pm. Partly sunny, with a high near 88. Southwest wind around 9 mph.

    High: 88 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 69. Southwest wind around 5 mph becoming light and variable in the evening.

    Low: 69 °F

    Mostly Cloudy
    then Chance
    T-storms

Detailed Forecast

Overnight
Mostly clear, with a low around 55. Light northwest wind.
Friday
Sunny, with a high near 81. Calm wind becoming southwest around 6 mph in the afternoon.
Friday Night
A 10 percent chance of showers after 5am. Mostly cloudy, with a low around 64. Light south wind increasing to 5 to 9 mph in the evening.
Saturday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 78. South wind 9 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 68. South wind 13 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Breezy, with a south wind 13 to 16 mph, with gusts as high as 24 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 72. South wind 8 to 11 mph, with gusts as high as 20 mph.
Monday
A 30 percent chance of showers before 1pm. Partly sunny, with a high near 88. Southwest wind around 9 mph.
Monday Night
A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 69. Southwest wind around 5 mph becoming light and variable in the evening.
Tuesday
A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 85. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Calm wind.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 86. Calm wind becoming southwest around 5 mph in the afternoon.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67. Light south wind.
Thursday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 85. Southwest wind 5 to 7 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Calmar IA
 43.17°N 91.86°W
Last Update:
6:26 pm CDT Aug 27, 2026
Forecast Valid:
12am CDT Aug 28, 2026-6pm CDT Sep 3, 2026
 
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