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

64°F

18°C

Humidity 36%
Wind Speed Calm
Barometer 29.65 in (1004.4 mb)
Dewpoint 37°F (3°C)
Visibility 7.00 mi
Last update 9 Mar 6:55 pm CDT
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Mostly clear, with a low around 35. Calm wind becoming northeast 5 to 7 mph after midnight. 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 showers before 1am, then a chance of snow showers. Mostly cloudy, with a low around 31. North wind 7 to 10 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
    Showers then
    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. Cloudy, then gradually becoming mostly sunny, with a high near 42. 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: 42 °F

    Chance Snow
    Showers then
    Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 22. Northwest wind around 5 mph becoming calm in the evening.

    Low: 22 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of rain and snow showers after 1pm. Partly sunny, with a high near 46. Light west wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 20%.

    High: 46 °F

    Mostly Sunny
    then Slight
    Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: Rain and snow showers likely, mainly before 1am. Mostly cloudy, with a low around 29. South wind 8 to 11 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 70%.

    Low: 29 °F

    Rain/Snow
    Likely

  • Friday

    Friday: Mostly sunny, with a high near 44. Northwest wind 11 to 15 mph, with gusts as high as 25 mph.

    High: 44 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of snow showers after 1am. Mostly cloudy, with a low around 24. Northwest wind around 6 mph becoming calm in the evening.

    Low: 24 °F

    Mostly Cloudy
    then Chance
    Snow Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 35. Calm wind becoming northeast 5 to 7 mph after midnight. 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 showers before 1am, then a chance of snow showers. Mostly cloudy, with a low around 31. North wind 7 to 10 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. Cloudy, then gradually becoming mostly sunny, with a high near 42. 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 22. Northwest wind around 5 mph becoming calm in the evening.
Thursday
A slight chance of rain and snow showers after 1pm. Partly sunny, with a high near 46. Light west wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Thursday Night
Rain and snow showers likely, mainly before 1am. Mostly cloudy, with a low around 29. 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 44. Northwest wind 11 to 15 mph, with gusts as high as 25 mph.
Friday Night
A 30 percent chance of snow showers after 1am. Mostly cloudy, with a low around 24. Northwest wind around 6 mph becoming calm in the evening.
Saturday
A 40 percent chance of snow showers. Cloudy, with a high near 40. Southeast wind 5 to 7 mph.
Saturday Night
Rain and snow showers likely. Cloudy, with a low around 26. East wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Sunday
Rain and snow showers likely. Mostly cloudy, with a high near 36. Breezy, with a north wind 9 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Sunday Night
A 20 percent chance of snow showers. Mostly cloudy, with a low around 9. Northwest wind 7 to 13 mph, with gusts as high as 24 mph.
Monday
Mostly cloudy, with a high near 27. Northwest wind 6 to 9 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.93°N 90.81°W
Last Update:
6:21 pm CDT Mar 9, 2026
Forecast Valid:
7pm CDT Mar 9, 2026-6pm CDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation