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.

Fog/Mist

30°F

-1°C

Humidity 100%
Wind Speed W 5 mph
Barometer 29.78 in
Dewpoint 30°F (-1°C)
Visibility 2.50 mi
Wind Chill25°F (-4°C)
Last update 7 Jan 12:15 am CST
Extended Forecast for

Calmar IA

  • Overnight

    Overnight: Patchy fog before 4am. Areas of freezing fog after 4am. Otherwise, mostly cloudy, with a low around 28. Southwest wind around 6 mph.

    Low: 28 °F

    Areas
    Freezing Fog
    and Patchy
    Fog

  • Wednesday

    Wednesday: Areas of fog between 10am and noon. Widespread dense freezing fog, mainly before 9am. Otherwise, partly sunny, with a high near 41. South wind 6 to 10 mph.

    High: 41 °F

    Dense
    Freezing Fog
    and Areas Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 2am. Otherwise, increasing clouds, with a low around 32. South wind 6 to 8 mph.

    Low: 32 °F

    Partly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: Rain likely, mainly after noon. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 39. South wind 5 to 8 mph becoming north in the afternoon. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    High: 39 °F

    Slight Chance
    Rain and
    Patchy Fog
    then Rain
    Likely

  • Thursday Night

    Thursday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 30. North wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 30 °F

    Rain Likely
    then Chance
    Rain

  • Friday

    Friday: A slight chance of rain and snow before noon. Partly sunny, with a high near 36. North wind 8 to 10 mph. Chance of precipitation is 20%.

    High: 36 °F

    Slight Chance
    Rain/Snow
    then Partly
    Sunny

  • Friday Night

    Friday Night: A slight chance of rain and snow before midnight, then a chance of snow. Mostly cloudy, with a low around 25. North wind 8 to 11 mph. Chance of precipitation is 50%.

    Low: 25 °F

    Slight Chance
    Rain/Snow
    then Chance
    Snow

  • Saturday

    Saturday: A 50 percent chance of snow. Partly sunny, with a high near 29. Blustery, with a northwest wind 13 to 17 mph, with gusts as high as 25 mph.

    High: 29 °F

    Chance Snow
    and Blustery

  • Saturday Night

    Saturday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 15. Blustery, with a northwest wind 11 to 17 mph.

    Low: 15 °F

    Chance Snow
    and Blustery
    then Mostly
    Cloudy

Detailed Forecast

Overnight
Patchy fog before 4am. Areas of freezing fog after 4am. Otherwise, mostly cloudy, with a low around 28. Southwest wind around 6 mph.
Wednesday
Areas of fog between 10am and noon. Widespread dense freezing fog, mainly before 9am. Otherwise, partly sunny, with a high near 41. South wind 6 to 10 mph.
Wednesday Night
Patchy fog after 2am. Otherwise, increasing clouds, with a low around 32. South wind 6 to 8 mph.
Thursday
Rain likely, mainly after noon. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 39. South wind 5 to 8 mph becoming north in the afternoon. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 30. North wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Friday
A slight chance of rain and snow before noon. Partly sunny, with a high near 36. North wind 8 to 10 mph. Chance of precipitation is 20%.
Friday Night
A slight chance of rain and snow before midnight, then a chance of snow. Mostly cloudy, with a low around 25. North wind 8 to 11 mph. Chance of precipitation is 50%.
Saturday
A 50 percent chance of snow. Partly sunny, with a high near 29. Blustery, with a northwest wind 13 to 17 mph, with gusts as high as 25 mph.
Saturday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 15. Blustery, with a northwest wind 11 to 17 mph.
Sunday
Mostly sunny, with a high near 28. Northwest wind around 10 mph becoming southwest in the afternoon.
Sunday Night
Partly cloudy, with a low around 21. Southwest wind around 10 mph.
Monday
Partly sunny, with a high near 36. Southwest wind around 10 mph, with gusts as high as 18 mph.
Monday Night
Mostly cloudy, with a low around 24. West wind around 9 mph.
Tuesday
Partly sunny, with a high near 33. West wind 8 to 10 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:
10:26 pm CST Jan 6, 2026
Forecast Valid:
12am CST Jan 7, 2026-6pm CST Jan 13, 2026
 
Forecast Discussion
 
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Additional Resources

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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