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

15°F

-9°C

Humidity 54%
Wind Speed Calm
Barometer 30.03 in (1018.9 mb)
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Last update 2 Jan 10:55 pm CST
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Cloudy, with a low around 10. Calm wind.

    Low: 10 °F

    Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 23. Calm wind becoming west around 5 mph.

    High: 23 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 2. Calm wind.

    Low: 2 °F

    Mostly Clear

  • Sunday

    Sunday: A chance of snow between noon and 3pm, then a chance of freezing rain after 3pm. Partly sunny, with a high near 27. Calm wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 30%.

    High: 27 °F

    Mostly Sunny
    then Chance
    Wintry Mix

  • Sunday Night

    Sunday Night: A chance of snow and freezing rain before 9pm, then a chance of snow between 9pm and midnight. Mostly cloudy, with a low around 19. Southeast wind around 6 mph becoming calm after midnight. Chance of precipitation is 30%.

    Low: 19 °F

    Chance Wintry
    Mix then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 38. Calm wind.

    High: 38 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A slight chance of freezing rain after midnight. Mostly cloudy, with a low around 26. Calm wind. Chance of precipitation is 20%.

    Low: 26 °F

    Mostly Cloudy
    then Slight
    Chance
    Freezing Rain

  • Tuesday

    Tuesday: A 20 percent chance of rain before noon. Partly sunny, with a high near 38. Light and variable wind.

    High: 38 °F

    Slight Chance
    Rain then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 23. Calm wind.

    Low: 23 °F

    Partly Cloudy

Detailed Forecast

Tonight
Cloudy, with a low around 10. Calm wind.
Saturday
Mostly cloudy, with a high near 23. Calm wind becoming west around 5 mph.
Saturday Night
Mostly clear, with a low around 2. Calm wind.
Sunday
A chance of snow between noon and 3pm, then a chance of freezing rain after 3pm. Partly sunny, with a high near 27. Calm wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 30%.
Sunday Night
A chance of snow and freezing rain before 9pm, then a chance of snow between 9pm and midnight. Mostly cloudy, with a low around 19. Southeast wind around 6 mph becoming calm after midnight. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 38. Calm wind.
Monday Night
A slight chance of freezing rain after midnight. Mostly cloudy, with a low around 26. Calm wind. Chance of precipitation is 20%.
Tuesday
A 20 percent chance of rain before noon. Partly sunny, with a high near 38. Light and variable wind.
Tuesday Night
Partly cloudy, with a low around 23. Calm wind.
Wednesday
Mostly sunny, with a high near 41. Light south wind.
Wednesday Night
Partly cloudy, with a low around 29. Calm wind.
Thursday
A 20 percent chance of rain. Partly sunny, with a high near 42. Light and variable wind.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 28. Light northwest wind.
Friday
A chance of rain and snow. Mostly sunny, with a high near 37. Northwest wind 3 to 7 mph. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.95°N 90.81°W
Last Update:
10:36 pm CST Jan 2, 2026
Forecast Valid:
11pm CST Jan 2, 2026-6pm CST Jan 9, 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