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.

Partly Cloudy

32°F

0°C

Humidity 98%
Wind Speed Calm
Barometer 30.11 in (1020.8 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 5 Apr 10:55 pm CDT
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Mostly cloudy, with a low around 28. Calm wind becoming northwest 5 to 7 mph after midnight. Winds could gust as high as 18 mph.

    Low: 28 °F

    Mostly Cloudy

  • Monday

    Monday: A chance of flurries before 1pm, then a slight chance of snow showers between 1pm and 5pm, then a chance of sprinkles and flurries after 5pm. Mostly cloudy, with a high near 40. Northwest wind 8 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

    High: 40 °F

    Mostly Cloudy
    then Slight
    Chance
    Sprinkles/Snow

  • Monday Night

    Monday Night: A chance of flurries before 8pm. Mostly clear, with a low around 15. North wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 20 mph.

    Low: 15 °F

    Chance
    Flurries

  • Tuesday

    Tuesday: Sunny, with a high near 45. Calm wind becoming south around 5 mph in the afternoon.

    High: 45 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of snow showers before 1am, then rain and snow showers between 1am and 4am, then rain showers after 4am. Low around 32. Southeast wind 5 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 32 °F

    Chance Snow
    Showers then
    Rain/Snow

  • Wednesday

    Wednesday: Showers likely, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 64. Breezy, with a south wind 10 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 64 °F

    Chance
    Showers then
    Showers
    Likely and
    Breezy

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 41. Southwest wind 6 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.

    Low: 41 °F

    Showers
    Likely

  • Thursday

    Thursday: A 30 percent chance of showers, mainly after 1pm. Mostly sunny, with a high near 58. West wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 58 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers. Partly cloudy, with a low around 31. Northwest wind around 5 mph becoming calm in the evening.

    Low: 31 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly cloudy, with a low around 28. Calm wind becoming northwest 5 to 7 mph after midnight. Winds could gust as high as 18 mph.
Monday
A chance of flurries before 1pm, then a slight chance of snow showers between 1pm and 5pm, then a chance of sprinkles and flurries after 5pm. Mostly cloudy, with a high near 40. Northwest wind 8 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Monday Night
A chance of flurries before 8pm. Mostly clear, with a low around 15. North wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 45. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
A chance of snow showers before 1am, then rain and snow showers between 1am and 4am, then rain showers after 4am. Low around 32. Southeast wind 5 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Wednesday
Showers likely, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 64. Breezy, with a south wind 10 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 41. Southwest wind 6 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Thursday
A 30 percent chance of showers, mainly after 1pm. Mostly sunny, with a high near 58. West wind 6 to 10 mph, with gusts as high as 18 mph.
Thursday Night
A 30 percent chance of showers. Partly cloudy, with a low around 31. Northwest wind around 5 mph becoming calm in the evening.
Friday
A 30 percent chance of showers. Mostly sunny, with a high near 58. Light north wind.
Friday Night
A 30 percent chance of showers. Partly cloudy, with a low around 35. Light and variable wind.
Saturday
A 40 percent chance of showers. Partly sunny, with a high near 60. Southeast wind 3 to 8 mph.
Saturday Night
Showers likely. Mostly cloudy, with a low around 46. Southeast wind around 7 mph. Chance of precipitation is 60%.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 69. South wind 6 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.93°N 90.81°W
Last Update:
10:41 pm CDT Apr 5, 2026
Forecast Valid:
11pm CDT Apr 5, 2026-6pm CDT Apr 12, 2026
 
Forecast Discussion
 
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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