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

53°F

12°C

Humidity 98%
Wind Speed Calm
Barometer 29.97 in (1015.2 mb)
Dewpoint 53°F (12°C)
Visibility 9.00 mi
Last update 13 Oct 11:55 pm CDT
Extended Forecast for

Tunnel City WI

  • Overnight

    Overnight: A chance of sprinkles before 1am. Mostly cloudy, with a low around 44. Light north wind.

    Low: 44 °F

    Chance
    Sprinkles

  • Wednesday

    Wednesday: Partly sunny, with a high near 63. Calm wind becoming north around 5 mph.

    High: 63 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 42. Light east wind.

    Low: 42 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers, mainly after 1pm. High near 59. Calm wind becoming northeast 5 to 7 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 59 °F

    Cloudy then
    Showers

  • Thursday Night

    Thursday Night: A 50 percent chance of showers before 1am. Mostly cloudy, with a low around 37. Breezy, with a northwest wind 7 to 17 mph, with gusts as high as 29 mph. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 37 °F

    Chance
    Showers and
    Breezy

  • Friday

    Friday: Mostly sunny, with a high near 54. Breezy, with a north wind 17 to 20 mph, with gusts as high as 33 mph.

    High: 54 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Widespread frost, mainly after 3am. Otherwise, clear, with a low around 30. Northwest wind around 5 mph becoming calm in the evening.

    Low: 30 °F

    Mostly Clear
    then Frost

  • Saturday

    Saturday: Widespread frost before 9am. Otherwise, sunny, with a high near 59. Light southwest wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 23 mph.

    High: 59 °F

    Frost then
    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 37. Southwest wind around 9 mph, with gusts as high as 24 mph.

    Low: 37 °F

    Clear

Detailed Forecast

Overnight
A chance of sprinkles before 1am. Mostly cloudy, with a low around 44. Light north wind.
Wednesday
Partly sunny, with a high near 63. Calm wind becoming north around 5 mph.
Wednesday Night
Mostly cloudy, with a low around 42. Light east wind.
Thursday
Showers, mainly after 1pm. High near 59. Calm wind becoming northeast 5 to 7 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
A 50 percent chance of showers before 1am. Mostly cloudy, with a low around 37. Breezy, with a northwest wind 7 to 17 mph, with gusts as high as 29 mph. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Mostly sunny, with a high near 54. Breezy, with a north wind 17 to 20 mph, with gusts as high as 33 mph.
Friday Night
Widespread frost, mainly after 3am. Otherwise, clear, with a low around 30. Northwest wind around 5 mph becoming calm in the evening.
Saturday
Widespread frost before 9am. Otherwise, sunny, with a high near 59. Light southwest wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 23 mph.
Saturday Night
Clear, with a low around 37. Southwest wind around 9 mph, with gusts as high as 24 mph.
Sunday
Sunny, with a high near 65. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Partly cloudy, with a low around 43. Southwest wind 3 to 8 mph. Winds could gust as high as 23 mph.
Monday
Mostly sunny, with a high near 66. Calm wind.
Monday Night
Partly cloudy, with a low around 41. Calm wind.
Tuesday
Mostly sunny, with a high near 68. Calm wind becoming south 5 to 7 mph in the afternoon.
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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:
11:06 pm CDT Oct 13, 2026
Forecast Valid:
12am CDT Oct 14, 2026-6pm CDT Oct 20, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation