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

40°F

4°C

Humidity 69%
Wind Speed W 13 mph
Barometer 29.53 in (1001.1 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 13 Jan 6:55 am CST
Extended Forecast for

Sparta WI

  • Today

    Today: A slight chance of rain before 4pm, then a slight chance of sprinkles between 4pm and 5pm, then a slight chance of rain after 5pm. Increasing clouds, with a high near 45. West wind 7 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.

    High: 45 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Tonight

    Tonight: A slight chance of rain showers and flurries before 10pm, then a slight chance of flurries between 10pm and 3am. Mostly cloudy, with a low around 16. North wind 13 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.

    Low: 16 °F

    Slight Chance
    Rain/Flurries
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a steady temperature around 19. North wind 10 to 15 mph, with gusts as high as 29 mph.

    High: 19 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 6. Northwest wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 20 mph.

    Low: 6 °F

    Mostly Clear

  • Thursday

    Thursday: A 50 percent chance of snow after noon. Partly sunny, with a high near 29. Calm wind becoming south 5 to 8 mph in the afternoon. Winds could gust as high as 20 mph. New snow accumulation of less than a half inch possible.

    High: 29 °F

    Mostly Sunny
    then Chance
    Snow

  • Thursday Night

    Thursday Night: Snow. Low around 21. South wind around 7 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.

    Low: 21 °F

    Snow

  • Friday

    Friday: Snow. High near 32. Northwest wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.

    High: 32 °F

    Snow

  • Friday Night

    Friday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 8. Northwest wind 6 to 10 mph, with gusts as high as 23 mph.

    Low: 8 °F

    Chance Snow

  • Saturday

    Saturday: A 30 percent chance of snow. Mostly cloudy, with a high near 15. Northwest wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 15 °F

    Chance Snow

Detailed Forecast

Today
A slight chance of rain before 4pm, then a slight chance of sprinkles between 4pm and 5pm, then a slight chance of rain after 5pm. Increasing clouds, with a high near 45. West wind 7 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.
Tonight
A slight chance of rain showers and flurries before 10pm, then a slight chance of flurries between 10pm and 3am. Mostly cloudy, with a low around 16. North wind 13 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a steady temperature around 19. North wind 10 to 15 mph, with gusts as high as 29 mph.
Wednesday Night
Mostly clear, with a low around 6. Northwest wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 20 mph.
Thursday
A 50 percent chance of snow after noon. Partly sunny, with a high near 29. Calm wind becoming south 5 to 8 mph in the afternoon. Winds could gust as high as 20 mph. New snow accumulation of less than a half inch possible.
Thursday Night
Snow. Low around 21. South wind around 7 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.
Friday
Snow. High near 32. Northwest wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.
Friday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 8. Northwest wind 6 to 10 mph, with gusts as high as 23 mph.
Saturday
A 30 percent chance of snow. Mostly cloudy, with a high near 15. Northwest wind 6 to 10 mph, with gusts as high as 18 mph.
Saturday Night
Mostly cloudy, with a low around -1. Northwest wind around 6 mph.
Sunday
Partly sunny, with a high near 14. Northwest wind 5 to 8 mph, with gusts as high as 18 mph.
Sunday Night
Mostly cloudy, with a low around -1. West wind around 6 mph.
M.L.King Day
Partly sunny, with a high near 16. West wind 6 to 10 mph, with gusts as high as 18 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:
7:16 am CST Jan 13, 2026
Forecast Valid:
7am CST Jan 13, 2026-6pm CST Jan 19, 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