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

9°F

-13°C

Humidity 74%
Wind Speed Calm
Barometer 30.20 in (1024.7 mb)
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Last update 7 Dec 6:55 am CST
Extended Forecast for

3 Miles W Tunnel City WI

  • Today

    Today: Sunny, with a high near 16. Wind chill values as low as -6. North wind around 6 mph becoming calm in the afternoon.

    High: 16 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around -1. Calm wind.

    Low: -1 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 23. Calm wind becoming south 5 to 8 mph in the morning. Winds could gust as high as 18 mph.

    High: 23 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 14. South wind 7 to 10 mph, with gusts as high as 24 mph. New snow accumulation of less than a half inch possible.

    Low: 14 °F

    Chance Snow

  • Tuesday

    Tuesday: A chance of rain and snow after noon. Mostly cloudy, with a high near 36. West wind around 7 mph becoming south in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 36 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain and snow, becoming all snow after 3am. Low around 22. South wind 7 to 10 mph becoming northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.

    Low: 22 °F

    Rain/Snow
    then
    Rain/Snow
    Likely

  • Wednesday

    Wednesday: A 30 percent chance of snow before noon. Mostly cloudy, with a high near 30. Northwest wind 7 to 11 mph, with gusts as high as 24 mph.

    High: 30 °F

    Chance Snow
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 5. Northwest wind 3 to 6 mph.

    Low: 5 °F

    Slight Chance
    Snow

  • Thursday

    Thursday: A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 21. Northwest wind 5 to 7 mph.

    High: 21 °F

    Chance Snow

Detailed Forecast

Today
Sunny, with a high near 16. Wind chill values as low as -6. North wind around 6 mph becoming calm in the afternoon.
Tonight
Mostly cloudy, with a low around -1. Calm wind.
Monday
Mostly cloudy, with a high near 23. Calm wind becoming south 5 to 8 mph in the morning. Winds could gust as high as 18 mph.
Monday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 14. South wind 7 to 10 mph, with gusts as high as 24 mph. New snow accumulation of less than a half inch possible.
Tuesday
A chance of rain and snow after noon. Mostly cloudy, with a high near 36. West wind around 7 mph becoming south in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Tuesday Night
Rain and snow, becoming all snow after 3am. Low around 22. South wind 7 to 10 mph becoming northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.
Wednesday
A 30 percent chance of snow before noon. Mostly cloudy, with a high near 30. Northwest wind 7 to 11 mph, with gusts as high as 24 mph.
Wednesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 5. Northwest wind 3 to 6 mph.
Thursday
A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 21. Northwest wind 5 to 7 mph.
Thursday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around -2. Northwest wind around 7 mph.
Friday
Mostly cloudy, with a high near 12. Northwest wind 7 to 11 mph, with gusts as high as 21 mph.
Friday Night
Mostly cloudy, with a low around -8. Northwest wind 6 to 8 mph, with gusts as high as 21 mph.
Saturday
Partly sunny, with a high near 8. West wind 6 to 8 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W Tunnel City WI
 44.01°N 90.63°W
Last Update:
6:01 am CST Dec 7, 2025
Forecast Valid:
6am CST Dec 7, 2025-6pm CST Dec 13, 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