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.

Overcast

19°F

-7°C

Humidity 64%
Wind Speed Calm
Barometer 29.82 in (1011.7 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Last update 5 Dec 5:55 am CST
Extended Forecast for

2 Miles ESE Ontario WI

  • Today

    Today: Snow, mainly after noon. High near 28. Southwest wind 8 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. Total daytime snow accumulation of less than one inch possible.

    High: 28 °F

    Chance Snow
    then Snow

  • Tonight

    Tonight: Snow likely, possibly mixing with freezing rain after 9pm, then gradually ending. Cloudy, with a low around 11. Southwest wind 8 to 10 mph becoming northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 70%. Little or no ice accumulation expected. New snow accumulation of less than a half inch possible.

    Low: 11 °F

    Wintry Mix
    Likely then
    Mostly Cloudy

  • Saturday

    Saturday: Increasing clouds, with a high near 21. Light and variable wind.

    High: 21 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: Snow. Low around 8. Light northeast wind. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Low: 8 °F

    Snow

  • Sunday

    Sunday: Mostly sunny, with a high near 18. North wind 3 to 6 mph.

    High: 18 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around -5. Calm wind.

    Low: -5 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 21. Calm wind becoming south 5 to 8 mph in the morning. Winds could gust as high as 18 mph.

    High: 21 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Monday Night

    Monday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 11. Southwest wind around 7 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.

    Low: 11 °F

    Snow Likely
    then Chance
    Snow

  • Tuesday

    Tuesday: A 40 percent chance of snow after noon. Mostly cloudy, with a high near 33. Southwest wind around 7 mph.

    High: 33 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

Today
Snow, mainly after noon. High near 28. Southwest wind 8 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. Total daytime snow accumulation of less than one inch possible.
Tonight
Snow likely, possibly mixing with freezing rain after 9pm, then gradually ending. Cloudy, with a low around 11. Southwest wind 8 to 10 mph becoming northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 70%. Little or no ice accumulation expected. New snow accumulation of less than a half inch possible.
Saturday
Increasing clouds, with a high near 21. Light and variable wind.
Saturday Night
Snow. Low around 8. Light northeast wind. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Sunday
Mostly sunny, with a high near 18. North wind 3 to 6 mph.
Sunday Night
Partly cloudy, with a low around -5. Calm wind.
Monday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 21. Calm wind becoming south 5 to 8 mph in the morning. Winds could gust as high as 18 mph.
Monday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 11. Southwest wind around 7 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.
Tuesday
A 40 percent chance of snow after noon. Mostly cloudy, with a high near 33. Southwest wind around 7 mph.
Tuesday Night
Snow. Low around 21. South wind 6 to 8 mph becoming west after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 80%.
Wednesday
A 30 percent chance of snow. Mostly cloudy, with a high near 31. Northwest wind 8 to 11 mph, with gusts as high as 21 mph.
Wednesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 3. Northwest wind 5 to 8 mph, with gusts as high as 18 mph.
Thursday
A 20 percent chance of snow. Partly sunny, with a high near 18. West wind 5 to 7 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ESE Ontario WI
 43.71°N 90.56°W
Last Update:
5:01 am CST Dec 5, 2025
Forecast Valid:
5am CST Dec 5, 2025-6pm CST Dec 11, 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