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

Hazardous Weather Conditions

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Fog/Mist

28°F

-2°C

Humidity 97%
Wind Speed Calm
Barometer 30.14 in (1021.9 mb)
Dewpoint 27°F (-3°C)
Visibility 4.00 mi
Last update 25 Dec 2:55 am CST
Extended Forecast for

Sparta / Fort McCoy Airport WI

Winter Weather Advisory December 25, 06:00pm until December 26, 06:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Overnight

    Overnight: Patchy fog. Otherwise, partly cloudy, with a steady temperature around 31. Calm wind.

    Low: 31 °F

    Patchy Fog

  • Christmas Day

    Christmas Day: Patchy drizzle after 4pm. Patchy fog before 8am. Otherwise, increasing clouds, with a high near 35. Light east wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 21 mph.

    High: 35 °F

    Patchy Fog
    then Patchy
    Drizzle

  • Thursday Night

    Thursday Night: Patchy drizzle or freezing rain before 10pm, then drizzle. Patchy fog after 2am. Otherwise, cloudy, with a temperature rising to around 37 by 3am. East wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 33 °F⇑

    Patchy
    Drizzle/Freezing
    Rain then
    Drizzle and
    Patchy Fog

  • Friday

    Friday: Patchy drizzle and fog before noon. Mostly cloudy, with a high near 42. Calm wind.

    High: 42 °F

    Patchy
    Drizzle and
    Patchy Fog
    then Mostly
    Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 32. Calm wind.

    Low: 32 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 45. Calm wind becoming southeast around 6 mph in the morning.

    High: 45 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 20 percent chance of rain. Cloudy, with a low around 35. Light and variable wind.

    Low: 35 °F

    Slight Chance
    Rain

  • Sunday

    Sunday: A chance of rain and snow. Mostly cloudy, with a high near 37. Breezy, with a light northwest wind increasing to 11 to 16 mph in the morning. Winds could gust as high as 28 mph. Chance of precipitation is 40%.

    High: 37 °F

    Chance
    Rain/Snow and
    Breezy

  • Sunday Night

    Sunday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 6. Northwest wind around 14 mph, with gusts as high as 32 mph.

    Low: 6 °F

    Chance Snow

Detailed Forecast

Overnight
Patchy fog. Otherwise, partly cloudy, with a steady temperature around 31. Calm wind.
Christmas Day
Patchy drizzle after 4pm. Patchy fog before 8am. Otherwise, increasing clouds, with a high near 35. Light east wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 21 mph.
Thursday Night
Patchy drizzle or freezing rain before 10pm, then drizzle. Patchy fog after 2am. Otherwise, cloudy, with a temperature rising to around 37 by 3am. East wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Patchy drizzle and fog before noon. Mostly cloudy, with a high near 42. Calm wind.
Friday Night
Mostly cloudy, with a low around 32. Calm wind.
Saturday
Mostly cloudy, with a high near 45. Calm wind becoming southeast around 6 mph in the morning.
Saturday Night
A 20 percent chance of rain. Cloudy, with a low around 35. Light and variable wind.
Sunday
A chance of rain and snow. Mostly cloudy, with a high near 37. Breezy, with a light northwest wind increasing to 11 to 16 mph in the morning. Winds could gust as high as 28 mph. Chance of precipitation is 40%.
Sunday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 6. Northwest wind around 14 mph, with gusts as high as 32 mph.
Monday
Partly sunny, with a high near 17. Blustery, with a northwest wind 11 to 17 mph, with gusts as high as 29 mph.
Monday Night
Partly cloudy, with a low around 5. Northwest wind 5 to 9 mph, with gusts as high as 22 mph.
Tuesday
Partly sunny, with a high near 27. West wind 5 to 9 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 11. West wind around 6 mph, with gusts as high as 20 mph.
Wednesday
Mostly cloudy, with a high near 23. Northwest wind 6 to 10 mph, with gusts as high as 18 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta / Fort McCoy Airport WI
 43.95°N 90.72°W
Last Update:
3:16 am CST Dec 25, 2025
Forecast Valid:
3am CST Dec 25, 2025-6pm CST Dec 31, 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