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

44°F

7°C

Humidity 98%
Wind Speed Calm
Barometer 29.79 in (1009.5 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 25 Nov 1:55 am CST
Extended Forecast for

Tunnel City WI

  • Overnight

    Overnight: A 40 percent chance of rain. Patchy fog. Otherwise, cloudy, with a low around 41. Calm wind. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Chance Rain
    and Patchy
    Fog

  • Tuesday

    Tuesday: Rain, mainly after 5pm. Patchy fog. High near 48. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 48 °F

    Chance Rain
    and Patchy
    Fog then Rain
    and Patchy
    Fog

  • Tuesday Night

    Tuesday Night: Rain before 2am, then rain and snow likely between 2am and 4am, then snow after 4am. Low around 26. Blustery, with a south wind 6 to 11 mph becoming northwest 16 to 21 mph after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.

    Low: 26 °F

    Rain then
    Rain/Snow and
    Blustery

  • Wednesday

    Wednesday: Snow, mainly before noon. High near 31. Blustery, with a northwest wind 18 to 23 mph, with gusts as high as 43 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    High: 31 °F

    Blustery.
    Snow then
    Chance Snow

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18. Blustery, with a northwest wind 13 to 16 mph, with gusts as high as 30 mph.

    Low: 18 °F

    Slight Chance
    Snow and
    Blustery then
    Mostly Cloudy

  • Thanksgiving Day

    Thanksgiving Day: Mostly cloudy, with a high near 28. Northwest wind 11 to 14 mph, with gusts as high as 25 mph.

    High: 28 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 12. Northwest wind 5 to 10 mph, with gusts as high as 21 mph.

    Low: 12 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 26. Northwest wind around 5 mph becoming calm in the afternoon.

    High: 26 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 50 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 15. Calm wind.

    Low: 15 °F

    Slight Chance
    Snow then
    Chance Snow

Detailed Forecast

Overnight
A 40 percent chance of rain. Patchy fog. Otherwise, cloudy, with a low around 41. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Rain, mainly after 5pm. Patchy fog. High near 48. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Rain before 2am, then rain and snow likely between 2am and 4am, then snow after 4am. Low around 26. Blustery, with a south wind 6 to 11 mph becoming northwest 16 to 21 mph after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.
Wednesday
Snow, mainly before noon. High near 31. Blustery, with a northwest wind 18 to 23 mph, with gusts as high as 43 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Wednesday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18. Blustery, with a northwest wind 13 to 16 mph, with gusts as high as 30 mph.
Thanksgiving Day
Mostly cloudy, with a high near 28. Northwest wind 11 to 14 mph, with gusts as high as 25 mph.
Thursday Night
Mostly cloudy, with a low around 12. Northwest wind 5 to 10 mph, with gusts as high as 21 mph.
Friday
Partly sunny, with a high near 26. Northwest wind around 5 mph becoming calm in the afternoon.
Friday Night
A 50 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 15. Calm wind.
Saturday
Snow likely, mainly before noon. Mostly cloudy, with a high near 28. Calm wind becoming east around 6 mph in the afternoon. Chance of precipitation is 60%.
Saturday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 13. Light and variable wind becoming north around 5 mph after midnight.
Sunday
A 30 percent chance of snow. Partly sunny, with a high near 28. West wind 5 to 7 mph.
Sunday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 10. West wind around 5 mph.
Monday
A 20 percent chance of snow. Partly sunny, with a high near 21. Northwest wind 5 to 7 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tunnel City WI
 44.01°N 90.57°W
Last Update:
1:46 am CST Nov 25, 2025
Forecast Valid:
2am CST Nov 25, 2025-6pm CST Dec 1, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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