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.

Fog/Mist

35°F

2°C

Humidity 96%
Wind Speed Calm
Barometer 30.10 in (1020.5 mb)
Dewpoint 34°F (1°C)
Visibility 4.00 mi
Last update 24 Dec 9:55 pm CST
Extended Forecast for

Sparta / Fort McCoy Airport WI

  • Tonight

    Tonight: Patchy drizzle before midnight. Cloudy, with a low around 27. Calm wind becoming northeast 5 to 8 mph after midnight.

    Low: 27 °F

    Patchy
    Drizzle then
    Cloudy

  • Christmas Day

    Christmas Day: Mostly cloudy, with a high near 35. East wind 9 to 14 mph, with gusts as high as 25 mph.

    High: 35 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A slight chance of rain before 10pm, then a slight chance of freezing rain between 10pm and 11pm, then rain likely after 11pm. Cloudy, with a temperature falling to near 31 by 10pm, then rising to around 35 during the remainder of the night. East wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 70%. Little or no ice accumulation expected.

    Low: 31 °F⇑

    Slight Chance
    Rain/Freezing
    Rain then
    Rain Likely

  • Friday

    Friday: A 30 percent chance of rain before noon. Mostly cloudy, with a high near 42. Calm wind.

    High: 42 °F

    Chance Rain
    then Mostly
    Cloudy

  • Friday Night

    Friday Night: Cloudy, with a low around 32. Calm wind.

    Low: 32 °F

    Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 45. Calm wind becoming south around 6 mph in the morning.

    High: 45 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before midnight. Cloudy, with a low around 28. Calm wind becoming northwest around 5 mph after midnight.

    Low: 28 °F

    Slight Chance
    Rain then
    Cloudy

  • Sunday

    Sunday: A chance of rain and snow before noon, then a chance of snow. Mostly cloudy, with a high near 35. Breezy, with a northwest wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 40%.

    High: 35 °F

    Chance
    Rain/Snow
    then Chance
    Snow and
    Breezy

  • Sunday Night

    Sunday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 7. Northwest wind around 14 mph, with gusts as high as 32 mph.

    Low: 7 °F

    Slight Chance
    Snow then
    Mostly Cloudy

Detailed Forecast

Tonight
Patchy drizzle before midnight. Cloudy, with a low around 27. Calm wind becoming northeast 5 to 8 mph after midnight.
Christmas Day
Mostly cloudy, with a high near 35. East wind 9 to 14 mph, with gusts as high as 25 mph.
Thursday Night
A slight chance of rain before 10pm, then a slight chance of freezing rain between 10pm and 11pm, then rain likely after 11pm. Cloudy, with a temperature falling to near 31 by 10pm, then rising to around 35 during the remainder of the night. East wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 70%. Little or no ice accumulation expected.
Friday
A 30 percent chance of rain before noon. Mostly cloudy, with a high near 42. Calm wind.
Friday Night
Cloudy, with a low around 32. Calm wind.
Saturday
Mostly cloudy, with a high near 45. Calm wind becoming south around 6 mph in the morning.
Saturday Night
A 20 percent chance of rain before midnight. Cloudy, with a low around 28. Calm wind becoming northwest around 5 mph after midnight.
Sunday
A chance of rain and snow before noon, then a chance of snow. Mostly cloudy, with a high near 35. Breezy, with a northwest wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 40%.
Sunday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 7. Northwest wind around 14 mph, with gusts as high as 32 mph.
Monday
Mostly sunny, with a high near 19. Northwest wind 10 to 15 mph, with gusts as high as 29 mph.
Monday Night
Mostly cloudy, with a low around 7. West wind 3 to 8 mph. Winds could gust as high as 21 mph.
Tuesday
Mostly cloudy, with a high near 28. Light west wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 9. West wind 6 to 8 mph, with gusts as high as 21 mph.
Wednesday
Partly sunny, with a high near 24. Northwest wind 8 to 11 mph, with gusts as high as 21 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta / Fort McCoy Airport WI
 43.95°N 90.72°W
Last Update:
10:07 pm CST Dec 24, 2025
Forecast Valid:
10pm CST Dec 24, 2025-6pm CST Dec 31, 2025
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation