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

9°F

-13°C

Humidity 59%
Wind Speed Calm
Barometer 30.56 in (1037.7 mb)
Dewpoint -2°F (-19°C)
Visibility 10.00 mi
Last update 30 Jan 7:55 pm CST
Extended Forecast for

Sparta WI

  • Tonight

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

    Low: -2 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 21. Wind chill values as low as -8. Light and variable wind.

    High: 21 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 4. Light south wind.

    Low: 4 °F

    Partly Cloudy

  • Sunday

    Sunday: Snow likely. Mostly cloudy, with a high near 25. South wind 3 to 8 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    High: 25 °F

    Snow Likely

  • Sunday Night

    Sunday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 13. Calm wind.

    Low: 13 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 26. Northwest wind around 5 mph becoming calm in the afternoon.

    High: 26 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 11. Calm wind.

    Low: 11 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of snow. Mostly sunny, with a high near 27. Calm wind.

    High: 27 °F

    Slight Chance
    Snow

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 8. Calm wind.

    Low: 8 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around -2. Northwest wind 3 to 6 mph.
Saturday
Mostly sunny, with a high near 21. Wind chill values as low as -8. Light and variable wind.
Saturday Night
Partly cloudy, with a low around 4. Light south wind.
Sunday
Snow likely. Mostly cloudy, with a high near 25. South wind 3 to 8 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Sunday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 13. Calm wind.
Monday
Mostly sunny, with a high near 26. Northwest wind around 5 mph becoming calm in the afternoon.
Monday Night
Mostly cloudy, with a low around 11. Calm wind.
Tuesday
A 20 percent chance of snow. Mostly sunny, with a high near 27. Calm wind.
Tuesday Night
Mostly cloudy, with a low around 8. Calm wind.
Wednesday
Mostly sunny, with a high near 26. Calm wind.
Wednesday Night
Mostly cloudy, with a low around 12. Calm wind.
Thursday
A 20 percent chance of snow. Mostly cloudy, with a high near 32. Calm wind becoming southwest around 6 mph in the morning.
Thursday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 21. Southwest wind around 6 mph becoming northwest after midnight.
Friday
A 20 percent chance of snow. Partly sunny, with a high near 31. Northwest wind 6 to 10 mph, with gusts as high as 20 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:
7:48 pm CST Jan 30, 2026
Forecast Valid:
9pm CST Jan 30, 2026-6pm CST Feb 6, 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