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

43°F

6°C

Humidity 51%
Wind Speed Calm
Barometer 30.13 in (1021.3 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 24 Mar 7:55 pm CDT
Extended Forecast for

Tunnel City WI

  • Tonight

    Tonight: Mostly cloudy, with a low around 34. South wind around 6 mph.

    Low: 34 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 65. South wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph.

    High: 65 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43. Light southwest wind.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers before 1pm. Partly sunny, with a high near 61. West wind 5 to 11 mph becoming north in the morning. Winds could gust as high as 22 mph.

    High: 61 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 21. North wind 6 to 11 mph, with gusts as high as 22 mph.

    Low: 21 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 43. North wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 43 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 23. West wind 5 to 8 mph, with gusts as high as 18 mph.

    Low: 23 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 52. West wind 6 to 10 mph, with gusts as high as 21 mph.

    High: 52 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 31. West wind around 6 mph becoming south in the evening.

    Low: 31 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 34. South wind around 6 mph.
Wednesday
Mostly sunny, with a high near 65. South wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 43. Light southwest wind.
Thursday
A 30 percent chance of showers before 1pm. Partly sunny, with a high near 61. West wind 5 to 11 mph becoming north in the morning. Winds could gust as high as 22 mph.
Thursday Night
Mostly cloudy, with a low around 21. North wind 6 to 11 mph, with gusts as high as 22 mph.
Friday
Mostly sunny, with a high near 43. North wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 23. West wind 5 to 8 mph, with gusts as high as 18 mph.
Saturday
Mostly sunny, with a high near 52. West wind 6 to 10 mph, with gusts as high as 21 mph.
Saturday Night
Partly cloudy, with a low around 31. West wind around 6 mph becoming south in the evening.
Sunday
Partly sunny, with a high near 60. South wind 6 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 38. South wind around 7 mph, with gusts as high as 18 mph.
Monday
Mostly sunny, with a high near 65. South wind 6 to 8 mph.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 40. Southeast wind 7 to 10 mph, with gusts as high as 21 mph.
Tuesday
A 30 percent chance of showers. Partly sunny, with a high near 60. East wind 10 to 14 mph, with gusts as high as 23 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Tunnel City WI
 44.01°N 90.57°W
Last Update:
5:51 pm CDT Mar 24, 2026
Forecast Valid:
8pm CDT Mar 24, 2026-6pm CDT Mar 31, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation