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.

Mostly Cloudy

18°F

-8°C

Humidity 64%
Wind Speed Calm
Barometer 30.03 in (1018.6 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Last update 24 Feb 1:55 am CST
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: Mostly cloudy, with a low around 9. Light south wind increasing to 5 to 9 mph. Winds could gust as high as 22 mph.

    Low: 9 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Snow likely, mainly between 1pm and 2pm. Increasing clouds, with a high near 35. South wind 10 to 14 mph becoming west in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 35 °F

    Slight Chance
    Snow then
    Snow Likely

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 10. Northwest wind 9 to 11 mph, with gusts as high as 22 mph.

    Low: 10 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 25. Wind chill values as low as zero. Northwest wind 5 to 7 mph becoming calm in the afternoon. Winds could gust as high as 18 mph.

    High: 25 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 9. Calm wind.

    Low: 9 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 38. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 38 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 24. Southwest wind 3 to 5 mph.

    Low: 24 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 52. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 52 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 20. West wind around 7 mph, with gusts as high as 20 mph.

    Low: 20 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 9. Light south wind increasing to 5 to 9 mph. Winds could gust as high as 22 mph.
Tuesday
Snow likely, mainly between 1pm and 2pm. Increasing clouds, with a high near 35. South wind 10 to 14 mph becoming west in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Tuesday Night
Partly cloudy, with a low around 10. Northwest wind 9 to 11 mph, with gusts as high as 22 mph.
Wednesday
Mostly sunny, with a high near 25. Wind chill values as low as zero. Northwest wind 5 to 7 mph becoming calm in the afternoon. Winds could gust as high as 18 mph.
Wednesday Night
Partly cloudy, with a low around 9. Calm wind.
Thursday
Mostly sunny, with a high near 38. Calm wind becoming southwest around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 24. Southwest wind 3 to 5 mph.
Friday
Mostly sunny, with a high near 52. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 20. West wind around 7 mph, with gusts as high as 20 mph.
Saturday
A 30 percent chance of snow. Partly sunny, with a high near 29. Northwest wind 6 to 8 mph.
Saturday Night
Partly cloudy, with a low around 6. Northwest wind around 5 mph becoming calm in the evening.
Sunday
A 20 percent chance of snow. Mostly sunny, with a high near 27. Calm wind becoming northeast around 5 mph.
Sunday Night
A 30 percent chance of snow. Partly cloudy, with a low around 10. Light east wind.
Monday
A 30 percent chance of snow. Mostly sunny, with a high near 32. Calm wind becoming southeast around 6 mph in the morning.
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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:
1:56 am CST Feb 24, 2026
Forecast Valid:
2am CST Feb 24, 2026-6pm CST Mar 2, 2026
 
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Additional Resources

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Chance of Precipitation