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

36°F

2°C

Humidity 89%
Wind Speed Calm
Barometer 30.08 in (1019.9 mb)
Dewpoint 33°F (1°C)
Visibility 8.00 mi
Last update 24 Dec 6:55 pm CST
Extended Forecast for

2 Miles N Ontario WI

  • Tonight

    Tonight: Areas of drizzle before 8pm. Mostly cloudy, with a low around 27. Calm wind becoming northeast 5 to 8 mph after midnight.

    Low: 27 °F

    Areas Drizzle
    then Mostly
    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 8 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 20 percent chance of rain before noon. Mostly cloudy, with a high near 43. Calm wind.

    High: 43 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Friday Night

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

    Low: 32 °F

    Mostly 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: Mostly cloudy, with a low around 29. Calm wind becoming northwest around 6 mph after midnight.

    Low: 29 °F

    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of rain and snow before noon, then a chance of snow. Mostly cloudy, with a high near 35. Breezy, with a northwest wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 40%.

    High: 35 °F

    Slight 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 6. Blustery, with a northwest wind 16 to 18 mph, with gusts as high as 33 mph.

    Low: 6 °F

    Blustery.
    Slight Chance
    Snow then
    Mostly Cloudy

Detailed Forecast

Tonight
Areas of drizzle before 8pm. Mostly 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 8 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 20 percent chance of rain before noon. Mostly cloudy, with a high near 43. Calm wind.
Friday Night
Mostly 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
Mostly cloudy, with a low around 29. Calm wind becoming northwest around 6 mph after midnight.
Sunday
A slight chance of rain and snow before noon, then a chance of snow. Mostly cloudy, with a high near 35. Breezy, with a northwest wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 40%.
Sunday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 6. Blustery, with a northwest wind 16 to 18 mph, with gusts as high as 33 mph.
Monday
Mostly sunny, with a high near 19. Blustery, with a northwest wind 11 to 16 mph, with gusts as high as 30 mph.
Monday Night
Mostly cloudy, with a low around 7. Northwest wind 5 to 10 mph, with gusts as high as 22 mph.
Tuesday
Mostly cloudy, with a high near 28. West wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 10. Northwest wind 7 to 9 mph, with gusts as high as 21 mph.
Wednesday
Partly sunny, with a high near 24. Northwest wind 9 to 13 mph, with gusts as high as 22 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Ontario WI
 43.75°N 90.58°W
Last Update:
6:11 pm CST Dec 24, 2025
Forecast Valid:
7pm CST Dec 24, 2025-6pm CST Dec 31, 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