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.

Mostly Cloudy

26°F

-3°C

Humidity 96%
Wind Speed Calm
Barometer 30.16 in (1022.7 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Last update 9 Jan 6:55 pm CST
Extended Forecast for

Wilton WI

  • Tonight

    Tonight: A 50 percent chance of snow, mainly after 4am. Mostly cloudy, with a steady temperature around 28. Light and variable wind. Total nighttime snow accumulation of less than a half inch possible.

    Low: 28 °F

    Mostly Cloudy
    then Chance
    Snow

  • Saturday

    Saturday: A 50 percent chance of snow. Cloudy, then gradually becoming mostly sunny, with a high near 31. Light west wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 25 mph. New snow accumulation of less than one inch possible.

    High: 31 °F

    Chance Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 16. Northwest wind 10 to 13 mph, with gusts as high as 26 mph.

    Low: 16 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 28. Northwest wind 7 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 24 mph.

    High: 28 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 20. Southwest wind around 7 mph, with gusts as high as 20 mph.

    Low: 20 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 41. West wind 6 to 8 mph.

    High: 41 °F

    Sunny

  • Monday Night

    Monday Night: A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 29. Southwest wind around 7 mph, with gusts as high as 20 mph.

    Low: 29 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tuesday

    Tuesday: A 40 percent chance of rain. Mostly cloudy, with a high near 43. West wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 43 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A chance of rain and snow before midnight, then a chance of snow. Mostly cloudy, with a low around 22. West wind 7 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 22 °F

    Chance
    Rain/Snow
    then Chance
    Snow

Detailed Forecast

Tonight
A 50 percent chance of snow, mainly after 4am. Mostly cloudy, with a steady temperature around 28. Light and variable wind. Total nighttime snow accumulation of less than a half inch possible.
Saturday
A 50 percent chance of snow. Cloudy, then gradually becoming mostly sunny, with a high near 31. Light west wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 25 mph. New snow accumulation of less than one inch possible.
Saturday Night
Mostly cloudy, with a low around 16. Northwest wind 10 to 13 mph, with gusts as high as 26 mph.
Sunday
Mostly sunny, with a high near 28. Northwest wind 7 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 24 mph.
Sunday Night
Partly cloudy, with a low around 20. Southwest wind around 7 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 41. West wind 6 to 8 mph.
Monday Night
A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 29. Southwest wind around 7 mph, with gusts as high as 20 mph.
Tuesday
A 40 percent chance of rain. Mostly cloudy, with a high near 43. West wind 7 to 11 mph, with gusts as high as 21 mph.
Tuesday Night
A chance of rain and snow before midnight, then a chance of snow. Mostly cloudy, with a low around 22. West wind 7 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Wednesday
A 20 percent chance of snow. Partly sunny, with a high near 28. North wind 7 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 13. North wind 3 to 6 mph.
Thursday
A 20 percent chance of snow. Mostly sunny, with a high near 28. Light and variable wind becoming southwest 5 to 8 mph in the morning.
Thursday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 19. South wind around 6 mph.
Friday
A 40 percent chance of snow. Mostly cloudy, with a high near 30. Southwest wind 6 to 9 mph becoming west in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Wilton WI
 43.81°N 90.52°W
Last Update:
6:41 pm CST Jan 9, 2026
Forecast Valid:
7pm CST Jan 9, 2026-6pm CST Jan 16, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation