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

41°F

5°C

Humidity 66%
Wind Speed Calm
Barometer 29.53 in (1000.9 mb)
Dewpoint 30°F (-1°C)
Visibility 9.00 mi
Last update 13 Jan 4:55 am CST
Extended Forecast for

Sparta WI

  • Today

    Today: A 20 percent chance of rain after 5pm. Increasing clouds, with a high near 44. West wind 8 to 15 mph, with gusts as high as 29 mph.

    High: 44 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Tonight

    Tonight: A slight chance of snow between 1am and 2am. 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

    Mostly Cloudy
    then Slight
    Chance Snow

  • 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 20 percent chance of rain after 5pm. Increasing clouds, with a high near 44. West wind 8 to 15 mph, with gusts as high as 29 mph.
Tonight
A slight chance of snow between 1am and 2am. 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:
4:41 am CST Jan 13, 2026
Forecast Valid:
5am CST Jan 13, 2026-6pm CST Jan 19, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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