National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Overcast

33°F

1°C

Humidity 90%
Wind Speed Calm
Barometer 29.78 in (1009.3 mb)
Dewpoint 30°F (-1°C)
Visibility 9.00 mi
Last update 11 Mar 4:55 am CDT
Extended Forecast for

Sparta WI

Winter Weather Advisory March 11, 05:52am until March 11, 01:00pm
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory March 11, 05:52am until March 11, 01:00pm

    NOW until 1:00pm Wed

    Winter Weather Advisory

  • Overnight

    Low: 33 °F

    Patchy
    Drizzle/Snow

  • Wednesday

    Wednesday: Drizzle, snow, and freezing rain, becoming all snow after 9am, then gradually ending. High near 41. Northwest wind 6 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. Little or no ice accumulation expected. New snow accumulation of less than one inch possible.

    High: 41 °F

    Wintry Mix
    then Snow

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 23. Northwest wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 18 mph.

    Low: 23 °F

    Mostly Clear

  • Thursday

    Thursday: A chance of rain and snow showers between 1pm and 4pm, then a chance of rain showers after 4pm. Increasing clouds, with a high near 45. Light and variable wind becoming south 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 30%.

    High: 45 °F

    Mostly Sunny
    then Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: Rain showers before 4am, then snow showers likely. Low around 30. Breezy, with a south wind 10 to 20 mph becoming west after midnight. Winds could gust as high as 38 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 30 °F

    Showers then
    Rain/Snow and
    Breezy

  • Friday

    Friday: Snow showers likely before 7am. Partly sunny, with a high near 40. Breezy, with a northwest wind 21 to 24 mph, with gusts as high as 39 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 40 °F

    Breezy. Snow
    Showers
    Likely then
    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 22. Northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 22 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 40 percent chance of snow after 1pm. Mostly cloudy, with a high near 40. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 40 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

Overnight
Patchy drizzle and snow. Mostly cloudy, with a steady temperature around 33. Calm wind. Chance of precipitation is 40%. Little or no snow accumulation expected.
Wednesday
Drizzle, snow, and freezing rain, becoming all snow after 9am, then gradually ending. High near 41. Northwest wind 6 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. Little or no ice accumulation expected. New snow accumulation of less than one inch possible.
Wednesday Night
Mostly clear, with a low around 23. Northwest wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Thursday
A chance of rain and snow showers between 1pm and 4pm, then a chance of rain showers after 4pm. Increasing clouds, with a high near 45. Light and variable wind becoming south 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Thursday Night
Rain showers before 4am, then snow showers likely. Low around 30. Breezy, with a south wind 10 to 20 mph becoming west after midnight. Winds could gust as high as 38 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Friday
Snow showers likely before 7am. Partly sunny, with a high near 40. Breezy, with a northwest wind 21 to 24 mph, with gusts as high as 39 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday Night
Mostly cloudy, with a low around 22. Northwest wind 5 to 7 mph becoming calm in the evening.
Saturday
A 40 percent chance of snow after 1pm. Mostly cloudy, with a high near 40. Calm wind becoming southeast around 5 mph in the afternoon.
Saturday Night
Snow. Low around 26. East wind 7 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.
Sunday
Snow, possibly mixed with rain, becoming all snow after 1pm. High near 35. Breezy, with a northeast wind 13 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.
Sunday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 11. Blustery, with a north wind around 16 mph, with gusts as high as 30 mph.
Monday
Partly sunny, with a high near 25. Blustery, with a northwest wind 13 to 16 mph, with gusts as high as 26 mph.
Monday Night
Partly cloudy, with a low around 5. Northwest wind 5 to 9 mph, with gusts as high as 18 mph.
Tuesday
Mostly sunny, with a high near 30. Calm wind becoming southwest around 6 mph 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:
5:12 am CDT Mar 11, 2026
Forecast Valid:
5am CDT Mar 11, 2026-6pm CDT Mar 17, 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