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.

Fair

30°F

-1°C

Humidity 82%
Wind Speed Calm
Barometer 30.06 in (1019.4 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Last update 12 Jan 9:55 am CST
Extended Forecast for

2 Miles N Ontario WI

  • Today

    Today: Mostly sunny, with a high near 44. West wind 5 to 8 mph.

    High: 44 °F

    Mostly Sunny

  • Tonight

    Tonight: A 30 percent chance of rain, mainly between 1am and 5am. Mostly cloudy, with a low around 31. Southwest wind 3 to 8 mph. Winds could gust as high as 18 mph.

    Low: 31 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tuesday

    Tuesday: A 30 percent chance of rain, mainly before noon. Partly sunny, with a high near 46. Southwest wind 7 to 14 mph becoming west in the afternoon. Winds could gust as high as 24 mph.

    High: 46 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 20. Northwest wind 10 to 14 mph, with gusts as high as 26 mph.

    Low: 20 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of snow before noon. Partly sunny, with a high near 27. Blustery, with a north wind 11 to 17 mph, with gusts as high as 29 mph.

    High: 27 °F

    Blustery.
    Chance Snow
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 7. North wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 23 mph.

    Low: 7 °F

    Mostly Clear

  • Thursday

    Thursday: A 30 percent chance of snow after noon. Mostly sunny, with a high near 26. Calm wind becoming south around 6 mph in the afternoon.

    High: 26 °F

    Mostly Sunny
    then Chance
    Snow

  • Thursday Night

    Thursday Night: Snow likely, mainly after midnight. Mostly cloudy, with a low around 20. South wind around 6 mph. Chance of precipitation is 60%.

    Low: 20 °F

    Snow Likely

  • Friday

    Friday: Snow. High near 30. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    High: 30 °F

    Snow

Detailed Forecast

Today
Mostly sunny, with a high near 44. West wind 5 to 8 mph.
Tonight
A 30 percent chance of rain, mainly between 1am and 5am. Mostly cloudy, with a low around 31. Southwest wind 3 to 8 mph. Winds could gust as high as 18 mph.
Tuesday
A 30 percent chance of rain, mainly before noon. Partly sunny, with a high near 46. Southwest wind 7 to 14 mph becoming west in the afternoon. Winds could gust as high as 24 mph.
Tuesday Night
Mostly cloudy, with a low around 20. Northwest wind 10 to 14 mph, with gusts as high as 26 mph.
Wednesday
A 30 percent chance of snow before noon. Partly sunny, with a high near 27. Blustery, with a north wind 11 to 17 mph, with gusts as high as 29 mph.
Wednesday Night
Mostly clear, with a low around 7. North wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 23 mph.
Thursday
A 30 percent chance of snow after noon. Mostly sunny, with a high near 26. Calm wind becoming south around 6 mph in the afternoon.
Thursday Night
Snow likely, mainly after midnight. Mostly cloudy, with a low around 20. South wind around 6 mph. Chance of precipitation is 60%.
Friday
Snow. High near 30. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Friday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 9. Northwest wind 7 to 9 mph, with gusts as high as 20 mph.
Saturday
A 30 percent chance of snow. Mostly cloudy, with a high near 15. Northwest wind 7 to 11 mph, with gusts as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around -1. Northwest wind around 8 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, with a high near 18. West wind 7 to 10 mph, with gusts as high as 20 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:
6:51 am CST Jan 12, 2026
Forecast Valid:
10am CST Jan 12, 2026-6pm CST Jan 18, 2026
 
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Additional Resources

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