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

57°F

14°C

Humidity 48%
Wind Speed SW 16 mph
Barometer 29.51 in (999.6 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 9 Mar 2:55 am CDT
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: Mostly cloudy, with a low around 44. Southwest wind around 10 mph, with gusts as high as 28 mph.

    Low: 44 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 64. Southwest wind around 8 mph becoming north in the afternoon.

    High: 64 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 36. Northeast wind around 6 mph becoming calm after midnight.

    Low: 36 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 53. East wind 6 to 8 mph.

    High: 53 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Rain showers likely before 4am, then rain and snow showers likely. Mostly cloudy, with a low around 31. Northeast wind 6 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 31 °F

    Chance
    Showers then
    Rain/Snow
    Likely

  • Wednesday

    Wednesday: Snow showers likely, mainly before 1pm. Mostly cloudy, with a high near 40. North wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 40 °F

    Snow Showers
    Likely

  • 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 chance of rain and snow showers after 1pm. Partly sunny, with a high near 46. Light and variable wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 30%.

    High: 46 °F

    Mostly Sunny
    then Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: Rain and snow showers, mainly before 1am. Low around 28. South wind 10 to 14 mph becoming west after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 90%.

    Low: 28 °F

    Rain/Snow

Detailed Forecast

Overnight
Mostly cloudy, with a low around 44. Southwest wind around 10 mph, with gusts as high as 28 mph.
Monday
Partly sunny, with a high near 64. Southwest wind around 8 mph becoming north in the afternoon.
Monday Night
Partly cloudy, with a low around 36. Northeast wind around 6 mph becoming calm after midnight.
Tuesday
Mostly sunny, with a high near 53. East wind 6 to 8 mph.
Tuesday Night
Rain showers likely before 4am, then rain and snow showers likely. Mostly cloudy, with a low around 31. Northeast wind 6 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Wednesday
Snow showers likely, mainly before 1pm. Mostly cloudy, with a high near 40. North wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. 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 chance of rain and snow showers after 1pm. Partly sunny, with a high near 46. Light and variable wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 30%.
Thursday Night
Rain and snow showers, mainly before 1am. Low around 28. South wind 10 to 14 mph becoming west after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 90%.
Friday
A 20 percent chance of snow showers before 1pm. Mostly sunny, with a high near 44. Northwest wind 13 to 15 mph, with gusts as high as 26 mph.
Friday Night
A 20 percent chance of snow showers. Mostly cloudy, with a low around 24. Northwest wind 5 to 7 mph becoming light and variable in the evening.
Saturday
A 50 percent chance of snow showers. Mostly cloudy, with a high near 44. Southeast wind 3 to 7 mph.
Saturday Night
Snow showers likely. Cloudy, with a low around 26. East wind 5 to 8 mph. Chance of precipitation is 60%.
Sunday
Snow showers likely. Mostly cloudy, with a high near 39. East wind 9 to 14 mph becoming north in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 60%.
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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:
3:11 am CDT Mar 9, 2026
Forecast Valid:
3am CDT Mar 9, 2026-6pm CDT Mar 15, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

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Chance of Precipitation