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

17°F

-8°C

Humidity 92%
Wind Speed Calm
Barometer 30.03 in (1018.6 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Last update 12 Jan 7:55 am CST
Extended Forecast for

Sparta WI

  • Today

    Today: Sunny, with a high near 43. West wind 3 to 7 mph.

    High: 43 °F

    Sunny

  • Tonight

    Tonight: A chance of snow between 1am and 3am, then a chance of rain after 3am. Mostly cloudy, with a low around 31. Calm wind becoming southwest 5 to 7 mph after midnight. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 31 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Tuesday

    Tuesday: A 30 percent chance of rain, mainly before noon. Partly sunny, with a high near 45. West wind 6 to 11 mph, with gusts as high as 23 mph.

    High: 45 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 20. Northwest wind 8 to 11 mph, with gusts as high as 25 mph.

    Low: 20 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of snow before noon. Partly sunny, with a high near 27. North wind 10 to 15 mph, with gusts as high as 28 mph.

    High: 27 °F

    Slight Chance
    Snow then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 8. North wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 22 mph.

    Low: 8 °F

    Mostly Clear

  • Thursday

    Thursday: A 30 percent chance of snow after noon. Mostly sunny, with a high near 27. Calm wind becoming south around 6 mph in the afternoon.

    High: 27 °F

    Mostly Sunny
    then Chance
    Snow

  • Thursday Night

    Thursday Night: Snow likely. Mostly cloudy, with a low around 20. South wind around 5 mph. Chance of precipitation is 70%.

    Low: 20 °F

    Snow Likely

  • Friday

    Friday: Snow. High near 31. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    High: 31 °F

    Snow

Detailed Forecast

Today
Sunny, with a high near 43. West wind 3 to 7 mph.
Tonight
A chance of snow between 1am and 3am, then a chance of rain after 3am. Mostly cloudy, with a low around 31. Calm wind becoming southwest 5 to 7 mph after midnight. Chance of precipitation is 40%. Little or no snow accumulation expected.
Tuesday
A 30 percent chance of rain, mainly before noon. Partly sunny, with a high near 45. West wind 6 to 11 mph, with gusts as high as 23 mph.
Tuesday Night
Mostly cloudy, with a low around 20. Northwest wind 8 to 11 mph, with gusts as high as 25 mph.
Wednesday
A 20 percent chance of snow before noon. Partly sunny, with a high near 27. North wind 10 to 15 mph, with gusts as high as 28 mph.
Wednesday Night
Mostly clear, with a low around 8. North wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 22 mph.
Thursday
A 30 percent chance of snow after noon. Mostly sunny, with a high near 27. Calm wind becoming south around 6 mph in the afternoon.
Thursday Night
Snow likely. Mostly cloudy, with a low around 20. South wind around 5 mph. Chance of precipitation is 70%.
Friday
Snow. High near 31. 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. Mostly cloudy, with a low around 9. Northwest wind 6 to 8 mph, with gusts as high as 20 mph.
Saturday
A 30 percent chance of snow. Mostly cloudy, with a high near 14. Northwest wind 6 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around -1. Northwest wind around 7 mph, with gusts as high as 18 mph.
Sunday
Partly sunny, with a high near 18. West 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 WI
 43.93°N 90.81°W
Last Update:
6:51 am CST Jan 12, 2026
Forecast Valid:
8am CST Jan 12, 2026-6pm CST Jan 18, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation