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

39°F

4°C

Humidity 62%
Wind Speed NW 15 G 20 mph
Barometer 29.60 in (1003.1 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill31°F (-1°C)
Last update 13 Jan 11:55 pm CST
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: A chance of flurries before 5am. Mostly clear early, then becoming mostly cloudy, with a low around 17. Blustery, with a northwest wind 15 to 22 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. Blustery, with a northwest wind 14 to 18 mph, with gusts as high as 30 mph.

    High: 21 °F

    Decreasing
    Clouds and
    Blustery

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 7. Northwest wind 5 to 7 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 25. 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: 25 °F

    Mostly Sunny
    then Chance
    Snow

  • Thursday Night

    Thursday Night: Snow. Low around 24. 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 1 to 3 inches possible.

    Low: 24 °F

    Snow

  • Friday

    Friday: Snow. High near 33. Northwest wind 6 to 14 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 8. Northwest wind 6 to 10 mph, with gusts as high as 23 mph.

    Low: 8 °F

    Chance Snow

  • Saturday

    Saturday: A 20 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

    Slight Chance
    Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around -1. West wind around 6 mph.

    Low: -1 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A chance of flurries before 5am. Mostly clear early, then becoming mostly cloudy, with a low around 17. Blustery, with a northwest wind 15 to 22 mph, with gusts as high as 32 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 21. Blustery, with a northwest wind 14 to 18 mph, with gusts as high as 30 mph.
Wednesday Night
Mostly clear, with a low around 7. 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 25. 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 24. 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 1 to 3 inches possible.
Friday
Snow. High near 33. Northwest wind 6 to 14 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 8. Northwest wind 6 to 10 mph, with gusts as high as 23 mph.
Saturday
A 20 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. West wind around 6 mph.
Sunday
A 30 percent chance of snow, mainly after noon. Partly sunny, with a high near 14. West wind 5 to 8 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 11. Northwest wind 6 to 10 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around -6. Northwest wind around 6 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 13. Calm wind becoming southwest around 6 mph in the morning.
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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:
11:21 pm CST Jan 13, 2026
Forecast Valid:
12am 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