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

11°F

-12°C

Humidity 51%
Wind Speed NW 5 mph
Barometer 30.03 in (1018.9 mb)
Dewpoint -4°F (-20°C)
Visibility 10.00 mi
Wind Chill2°F (-17°C)
Last update 17 Mar 1:55 am CDT
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: Mostly clear, with a low around -3. Wind chill values as low as -10. West wind around 6 mph.

    Low: -3 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 10 percent chance of snow after 5pm. Increasing clouds, with a high near 22. Wind chill values as low as -11. West wind 3 to 8 mph.

    High: 22 °F

    Sunny then
    Slight Chance
    Snow

  • Tuesday Night

    Tuesday Night: Snow before 4am, then a chance of snow and freezing rain. Low around 15. South wind 7 to 10 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. Little or no ice accumulation expected. New snow accumulation of 1 to 3 inches possible.

    Low: 15 °F

    Snow then
    Wintry Mix

  • Wednesday

    Wednesday: A slight chance of snow and freezing rain before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 45. South wind 6 to 8 mph. Chance of precipitation is 20%.

    High: 45 °F

    Slight Chance
    Wintry Mix
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 31. Southwest wind around 5 mph becoming calm in the evening.

    Low: 31 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 50. Calm wind becoming north around 6 mph in the afternoon.

    High: 50 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 32. West wind around 5 mph becoming calm in the evening.

    Low: 32 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 54. South wind 3 to 6 mph.

    High: 54 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 33. Southeast wind 3 to 5 mph.

    Low: 33 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around -3. Wind chill values as low as -10. West wind around 6 mph.
Tuesday
A 10 percent chance of snow after 5pm. Increasing clouds, with a high near 22. Wind chill values as low as -11. West wind 3 to 8 mph.
Tuesday Night
Snow before 4am, then a chance of snow and freezing rain. Low around 15. South wind 7 to 10 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. Little or no ice accumulation expected. New snow accumulation of 1 to 3 inches possible.
Wednesday
A slight chance of snow and freezing rain before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 45. South wind 6 to 8 mph. Chance of precipitation is 20%.
Wednesday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 31. Southwest wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 50. Calm wind becoming north around 6 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 32. West wind around 5 mph becoming calm in the evening.
Friday
Partly sunny, with a high near 54. South wind 3 to 6 mph.
Friday Night
Mostly cloudy, with a low around 33. Southeast wind 3 to 5 mph.
Saturday
Mostly sunny, with a high near 60. Southwest wind 5 to 9 mph.
Saturday Night
Mostly cloudy, with a low around 33. West wind around 8 mph becoming north after midnight.
Sunday
Partly sunny, with a high near 51. North wind 7 to 9 mph, with gusts as high as 18 mph.
Sunday Night
Mostly cloudy, with a low around 24. North wind around 6 mph.
Monday
Sunny, with a high near 44. North wind 5 to 8 mph becoming southeast in the afternoon.
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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:
1:26 am CDT Mar 17, 2026
Forecast Valid:
1am CDT Mar 17, 2026-6pm CDT Mar 23, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation