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

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Partly Cloudy

22°F

-6°C

Humidity 81%
Wind Speed Calm
Barometer 29.84 in (1012.2 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Last update 2 Dec 5:55 pm CST
Extended Forecast for

2 Miles N Ontario WI

  • Tonight

    Tonight: Snow likely, mainly between 3am and 5am. Cloudy, with a steady temperature around 22. South wind 7 to 9 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 22 °F

    Slight Chance
    Snow then
    Snow Likely

  • Wednesday

    Wednesday: A slight chance of snow before 9am, then a chance of flurries between 9am and noon. Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 13 by 5pm. Wind chill values as low as -1. Northwest wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    High: 24 °F⇓

    Slight Chance
    Snow then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around -8. Northwest wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 20 mph.

    Low: -8 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 15. Wind chill values as low as -8. Calm wind becoming south 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 15 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 2. Southwest wind around 8 mph, with gusts as high as 22 mph.

    Low: 2 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 26. Southwest wind around 6 mph.

    High: 26 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Friday Night

    Friday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 10. Light west wind.

    Low: 10 °F

    Chance Snow
    then Mostly
    Cloudy

  • Saturday

    Saturday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 24. Light northwest wind.

    High: 24 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday Night

    Saturday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 4. Calm wind.

    Low: 4 °F

    Chance Snow

Detailed Forecast

Tonight
Snow likely, mainly between 3am and 5am. Cloudy, with a steady temperature around 22. South wind 7 to 9 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.
Wednesday
A slight chance of snow before 9am, then a chance of flurries between 9am and noon. Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 13 by 5pm. Wind chill values as low as -1. Northwest wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly clear, with a low around -8. Northwest wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 20 mph.
Thursday
Sunny, with a high near 15. Wind chill values as low as -8. Calm wind becoming south 5 to 7 mph in the afternoon. Winds could gust as high as 18 mph.
Thursday Night
Mostly cloudy, with a low around 2. Southwest wind around 8 mph, with gusts as high as 22 mph.
Friday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 26. Southwest wind around 6 mph.
Friday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 10. Light west wind.
Saturday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 24. Light northwest wind.
Saturday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 4. Calm wind.
Sunday
A 30 percent chance of snow. Partly sunny, with a high near 20. Calm wind becoming northeast around 5 mph.
Sunday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 1. Calm wind.
Monday
A 20 percent chance of snow. Mostly cloudy, with a high near 23. Calm wind becoming south around 5 mph.
Monday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 11. Light and variable wind.
Tuesday
A 20 percent chance of snow. Mostly cloudy, with a high near 28. Southwest wind 3 to 7 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Ontario WI
 43.75°N 90.58°W
Last Update:
3:16 pm CST Dec 2, 2025
Forecast Valid:
6pm CST Dec 2, 2025-6pm CST Dec 9, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation