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 S 6 mph
Barometer 29.89 in
Dewpoint N/A
Visibility 9.00 mi
Last update 26 Jul 2:15 am CDT
Extended Forecast for

Calmar IA

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

  • Overnight

    Overnight: A chance of showers and thunderstorms before 4am, then a slight chance of showers. Cloudy, with a low around 72. South wind 3 to 5 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 72 °F

    Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 90. Heat index values as high as 105. Southwest wind 5 to 8 mph.

    High: 90 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers between 3am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 75. Southwest wind around 8 mph becoming southeast after midnight. Chance of precipitation is 20%.

    Low: 75 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Monday

    Monday: Sunny, with a high near 92. Heat index values as high as 103. Southwest wind 7 to 13 mph becoming west in the afternoon.

    High: 92 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 70. North wind 6 to 10 mph.

    Low: 70 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 85. North wind around 5 mph.

    High: 85 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 65. Calm wind.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85. Light south wind.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 66. Calm wind becoming south around 5 mph after midnight.

    Low: 66 °F

    Mostly Clear

Detailed Forecast

Overnight
A chance of showers and thunderstorms before 4am, then a slight chance of showers. Cloudy, with a low around 72. South wind 3 to 5 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Mostly sunny, with a high near 90. Heat index values as high as 105. Southwest wind 5 to 8 mph.
Sunday Night
A slight chance of showers between 3am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 75. Southwest wind around 8 mph becoming southeast after midnight. Chance of precipitation is 20%.
Monday
Sunny, with a high near 92. Heat index values as high as 103. Southwest wind 7 to 13 mph becoming west in the afternoon.
Monday Night
Mostly clear, with a low around 70. North wind 6 to 10 mph.
Tuesday
Mostly sunny, with a high near 85. North wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 65. Calm wind.
Wednesday
Sunny, with a high near 85. Light south wind.
Wednesday Night
Mostly clear, with a low around 66. Calm wind becoming south around 5 mph after midnight.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 84. South wind around 6 mph. Chance of precipitation is 30%.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67. South wind 3 to 5 mph.
Friday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 81. Light and variable wind becoming northwest around 5 mph in the afternoon.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65. Light northwest wind.
Saturday
Mostly sunny, with a high near 83. North wind 3 to 5 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Calmar IA
 43.17°N 91.86°W
Last Update:
1:46 am CDT Jul 26, 2026
Forecast Valid:
2am CDT Jul 26, 2026-6pm CDT Aug 1, 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