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

63°F

17°C

Humidity 42%
Wind Speed Calm
Barometer 29.61 in (1003.0 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 9 Mar 11:55 am CDT
Extended Forecast for

Sparta WI

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 66. West wind around 6 mph becoming northwest.

    High: 66 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 35. Northeast wind 3 to 7 mph. Winds could gust as high as 18 mph.

    Low: 35 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 51. East wind 8 to 13 mph, with gusts as high as 22 mph.

    High: 51 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of rain and snow showers before 10pm, then a chance of rain showers between 10pm and 1am, then a chance of snow showers after 1am. Mostly cloudy, with a low around 31. Northeast wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    Low: 31 °F

    Chance
    Rain/Snow

  • Wednesday

    Wednesday: A chance of snow showers before 1pm, then a slight chance of rain and snow showers between 1pm and 4pm, then a slight chance of rain showers after 4pm. Mostly cloudy, with a high near 41. North wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.

    High: 41 °F

    Chance Snow
    Showers then
    Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 21. Northwest wind around 6 mph becoming calm in the evening.

    Low: 21 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of rain and snow showers after 1pm. Partly sunny, with a high near 45. Light west wind becoming southwest 6 to 11 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 20%.

    High: 45 °F

    Mostly Sunny
    then Slight
    Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: Rain likely, possibly mixed with snow showers, mainly before 1am. Mostly cloudy, with a low around 28. South wind 8 to 11 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 70%.

    Low: 28 °F

    Rain/Snow
    Likely

  • Friday

    Friday: Mostly sunny, with a high near 43. Northwest wind 13 to 15 mph, with gusts as high as 26 mph.

    High: 43 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 66. West wind around 6 mph becoming northwest.
Tonight
Mostly clear, with a low around 35. Northeast wind 3 to 7 mph. Winds could gust as high as 18 mph.
Tuesday
Partly sunny, with a high near 51. East wind 8 to 13 mph, with gusts as high as 22 mph.
Tuesday Night
A chance of rain and snow showers before 10pm, then a chance of rain showers between 10pm and 1am, then a chance of snow showers after 1am. Mostly cloudy, with a low around 31. Northeast wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Wednesday
A chance of snow showers before 1pm, then a slight chance of rain and snow showers between 1pm and 4pm, then a slight chance of rain showers after 4pm. Mostly cloudy, with a high near 41. North wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.
Wednesday Night
Partly cloudy, with a low around 21. Northwest wind around 6 mph becoming calm in the evening.
Thursday
A slight chance of rain and snow showers after 1pm. Partly sunny, with a high near 45. Light west wind becoming southwest 6 to 11 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Thursday Night
Rain likely, possibly mixed with snow showers, mainly before 1am. Mostly cloudy, with a low around 28. South wind 8 to 11 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 70%.
Friday
Mostly sunny, with a high near 43. Northwest wind 13 to 15 mph, with gusts as high as 26 mph.
Friday Night
A 30 percent chance of snow showers after 1am. Mostly cloudy, with a low around 23. Northwest wind around 6 mph becoming calm in the evening.
Saturday
A 40 percent chance of snow showers. Cloudy, with a high near 43. Southeast wind 3 to 7 mph.
Saturday Night
Rain and snow showers likely. Cloudy, with a low around 26. East wind 6 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Sunday
Snow showers likely. Mostly cloudy, with a high near 38. Breezy, with a north wind 10 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.95°N 90.84°W
Last Update:
12:16 pm CDT Mar 9, 2026
Forecast Valid:
12pm CDT Mar 9, 2026-6pm CDT Mar 15, 2026
 
Forecast Discussion
 
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Additional Resources

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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