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.

Overcast

33°F

1°C

Humidity 61%
Wind Speed NW 14 G 21 mph
Barometer 29.68 in (1006.0 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill23°F (-5°C)
Last update 14 Jan 2:55 am CST
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: A chance of flurries before 5am. Mostly cloudy, with a low around 17. Blustery, with a northwest wind 14 to 20 mph, with gusts as high as 32 mph.

    Low: 17 °F

    Chance
    Flurries and
    Blustery

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 21. Northwest wind 9 to 15 mph, with gusts as high as 29 mph.

    High: 21 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 7. Northwest wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 20 mph.

    Low: 7 °F

    Mostly Clear

  • Thursday

    Thursday: A 50 percent chance of snow after noon. Partly sunny, with a high near 28. 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: 28 °F

    Mostly Sunny
    then Chance
    Snow

  • Thursday Night

    Thursday Night: Snow likely. Cloudy, with a low around 21. South wind around 6 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    Low: 21 °F

    Snow Likely

  • Friday

    Friday: Snow. High near 33. West wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 33 °F

    Snow

  • Friday Night

    Friday Night: A 30 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 7. Northwest wind 7 to 10 mph, with gusts as high as 23 mph.

    Low: 7 °F

    Chance Snow

  • Saturday

    Saturday: A 20 percent chance of snow before noon. Mostly cloudy, with a high near 13. Northwest wind 7 to 10 mph, with gusts as high as 20 mph.

    High: 13 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around -2. Northwest wind 3 to 6 mph.

    Low: -2 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A chance of flurries before 5am. Mostly cloudy, with a low around 17. Blustery, with a northwest wind 14 to 20 mph, with gusts as high as 32 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 21. Northwest wind 9 to 15 mph, with gusts as high as 29 mph.
Wednesday Night
Mostly clear, with a low around 7. Northwest wind 5 to 8 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 28. 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 likely. Cloudy, with a low around 21. South wind around 6 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Friday
Snow. High near 33. West wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Friday Night
A 30 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 7. Northwest wind 7 to 10 mph, with gusts as high as 23 mph.
Saturday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near 13. Northwest wind 7 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around -2. Northwest wind 3 to 6 mph.
Sunday
A 30 percent chance of snow, mainly after noon. Partly sunny, with a high near 13. Southwest wind 3 to 8 mph.
Sunday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 2. Northwest wind around 7 mph, with gusts as high as 18 mph.
M.L.King Day
Partly sunny, with a high near 12. Northwest wind 7 to 11 mph, with gusts as high as 21 mph.
Monday Night
Partly cloudy, with a low around -3. Northwest wind around 6 mph becoming calm in the evening.
Tuesday
Partly sunny, with a high near 12. Calm wind becoming west around 6 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.93°N 90.81°W
Last Update:
3:11 am CST Jan 14, 2026
Forecast Valid:
3am CST Jan 14, 2026-6pm CST Jan 20, 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