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

39°F

4°C

Humidity 65%
Wind Speed Calm
Barometer 30.15 in (1022.3 mb)
Dewpoint 28°F (-2°C)
Visibility 8.00 mi
Last update 24 Dec 11:55 am CST
Extended Forecast for

Sparta WI

  • This Afternoon

    This Afternoon: A chance of drizzle, mainly between 3pm and 5pm. Cloudy, with a high near 40. Southeast wind 5 to 7 mph becoming calm. Winds could gust as high as 21 mph.

    High: 40 °F

    Chance
    Drizzle

  • Tonight

    Tonight: A slight chance of drizzle before 7pm. Mostly cloudy, with a low around 28. Calm wind becoming northeast 5 to 7 mph after midnight.

    Low: 28 °F

    Slight Chance
    Drizzle then
    Mostly Cloudy

  • Christmas Day

    Christmas Day: Mostly cloudy, with a high near 35. Calm wind becoming east 5 to 8 mph in the morning. Winds could gust as high as 18 mph.

    High: 35 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Rain likely after midnight. Cloudy, with a low around 30. East wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 30 °F

    Cloudy then
    Rain Likely

  • Friday

    Friday: A 20 percent chance of rain before noon. Mostly cloudy, with a high near 42. Light and variable wind.

    High: 42 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 30. Calm wind.

    Low: 30 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 45. Calm wind becoming south around 5 mph.

    High: 45 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 22. Calm wind becoming northwest 5 to 9 mph in the evening. Winds could gust as high as 24 mph.

    Low: 22 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of snow. Mostly cloudy, with a high near 26. Blustery, with a northwest wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 31 mph.

    High: 26 °F

    Slight Chance
    Snow and
    Blustery

Detailed Forecast

This Afternoon
A chance of drizzle, mainly between 3pm and 5pm. Cloudy, with a high near 40. Southeast wind 5 to 7 mph becoming calm. Winds could gust as high as 21 mph.
Tonight
A slight chance of drizzle before 7pm. Mostly cloudy, with a low around 28. Calm wind becoming northeast 5 to 7 mph after midnight.
Christmas Day
Mostly cloudy, with a high near 35. Calm wind becoming east 5 to 8 mph in the morning. Winds could gust as high as 18 mph.
Thursday Night
Rain likely after midnight. Cloudy, with a low around 30. East wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
A 20 percent chance of rain before noon. Mostly cloudy, with a high near 42. Light and variable wind.
Friday Night
Mostly cloudy, with a low around 30. Calm wind.
Saturday
Mostly cloudy, with a high near 45. Calm wind becoming south around 5 mph.
Saturday Night
A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 22. Calm wind becoming northwest 5 to 9 mph in the evening. Winds could gust as high as 24 mph.
Sunday
A 20 percent chance of snow. Mostly cloudy, with a high near 26. Blustery, with a northwest wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 31 mph.
Sunday Night
Mostly cloudy, with a low around 3. Northwest wind 10 to 15 mph, with gusts as high as 33 mph.
Monday
Mostly sunny, with a high near 15. Northwest wind 8 to 14 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 5. Northwest wind 3 to 7 mph. Winds could gust as high as 18 mph.
Tuesday
Mostly cloudy, with a high near 24. Southwest wind 3 to 7 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:
9:26 am CST Dec 24, 2025
Forecast Valid:
12pm CST Dec 24, 2025-6pm CST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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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