National Weather Service

News Headlines

Summary: Heavy Rain and Flooding of Aug 15-19 2025

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Decorah (KDEH)

Lat: 43.28°NLon: 91.73°WElev: 1158ft.

Fair

70°F

21°C

Humidity	88%
Wind Speed	Vrbl 5 mph
Barometer	30.09 in
Dewpoint	66°F (19°C)
Visibility	10.00 mi
Last update	22 Aug 8:55 am CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Calmar IA

Today
High: 78 °F
Mostly Cloudy
Tonight
Low: 59 °F
Chance
T-storms then
Slight Chance
Showers and
Patchy Fog
Saturday
High: 69 °F
Sunny
Saturday Night
Low: 50 °F
Mostly Clear
Sunday
High: 66 °F
Sunny
Sunday Night
Low: 47 °F
Mostly Clear
Monday
High: 65 °F
Sunny
Monday Night
Low: 46 °F
Mostly Clear
Tuesday
High: 67 °F
Sunny

Detailed Forecast

Today

Mostly cloudy, with a high near 78. West wind around 6 mph.

Tonight

A chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 2am. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 59. West wind 3 to 6 mph. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday

Sunny, with a high near 69. Northwest wind 7 to 14 mph.

Saturday Night

Mostly clear, with a low around 50. West wind 7 to 10 mph.

Sunday

Sunny, with a high near 66. Northwest wind 7 to 14 mph, with gusts as high as 22 mph.

Sunday Night

Mostly clear, with a low around 47. Northwest wind 6 to 10 mph.

Monday

Sunny, with a high near 65. Northwest wind 6 to 10 mph.

Monday Night

Mostly clear, with a low around 46. Northwest wind around 6 mph.