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.

Mostly Cloudy

52°F

11°C

Humidity 71%
Wind Speed SW 5 mph
Barometer 29.86 in (1011.9 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 24 Nov 2:55 pm CST
Extended Forecast for

2 Miles N Ontario WI

  • This Afternoon

    This Afternoon: Rain likely, mainly after 4pm. Cloudy, with a high near 51. South wind 3 to 5 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 51 °F

    Rain Likely

  • Tonight

    Tonight: Rain, mainly before 5am. Patchy fog before midnight. Low around 41. Calm wind. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Rain and
    Patchy Fog
    then Chance
    Rain

  • Tuesday

    Tuesday: Rain likely, mainly after 5pm. Cloudy, with a high near 52. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 52 °F

    Chance Rain
    then Rain
    Likely

  • Tuesday Night

    Tuesday Night: Rain before midnight, then rain and snow likely between midnight and 1am, then snow likely after 1am. Low around 25. Blustery, with a west wind 9 to 14 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 25 °F

    Rain then
    Rain/Snow
    Likely and
    Blustery

  • Wednesday

    Wednesday: A 50 percent chance of snow, mainly before noon. Mostly cloudy, with a high near 33. Windy, with a northwest wind 20 to 26 mph, with gusts as high as 40 mph. New snow accumulation of less than a half inch possible.

    High: 33 °F

    Chance Snow
    and Breezy
    then Slight
    Chance Snow
    and Windy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 19. Blustery, with a northwest wind 11 to 17 mph, with gusts as high as 33 mph.

    Low: 19 °F

    Mostly Cloudy
    and Blustery
    then Mostly
    Cloudy

  • Thanksgiving Day

    Thanksgiving Day: Partly sunny, with a high near 29. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 29 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 14. Northwest wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 21 mph.

    Low: 14 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 29. Light northwest wind.

    High: 29 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Rain likely, mainly after 4pm. Cloudy, with a high near 51. South wind 3 to 5 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Rain, mainly before 5am. Patchy fog before midnight. Low around 41. Calm wind. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Rain likely, mainly after 5pm. Cloudy, with a high near 52. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Rain before midnight, then rain and snow likely between midnight and 1am, then snow likely after 1am. Low around 25. Blustery, with a west wind 9 to 14 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Wednesday
A 50 percent chance of snow, mainly before noon. Mostly cloudy, with a high near 33. Windy, with a northwest wind 20 to 26 mph, with gusts as high as 40 mph. New snow accumulation of less than a half inch possible.
Wednesday Night
Mostly cloudy, with a low around 19. Blustery, with a northwest wind 11 to 17 mph, with gusts as high as 33 mph.
Thanksgiving Day
Partly sunny, with a high near 29. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
Mostly cloudy, with a low around 14. Northwest wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 21 mph.
Friday
Partly sunny, with a high near 29. Light northwest wind.
Friday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 16. Calm wind.
Saturday
A 40 percent chance of snow. Mostly cloudy, with a high near 30. Calm wind becoming southeast around 6 mph.
Saturday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 17. Calm wind.
Sunday
A 40 percent chance of snow. Mostly cloudy, with a high near 30. Calm wind becoming northwest 5 to 7 mph in the morning.
Sunday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 14. Light northwest wind.
Monday
A 30 percent chance of snow. Partly sunny, with a high near 29. Northwest wind 3 to 7 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Ontario WI
 43.75°N 90.58°W
Last Update:
3:16 pm CST Nov 24, 2025
Forecast Valid:
3pm CST Nov 24, 2025-6pm CST Dec 1, 2025
 
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Additional Resources

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High Temperature

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Chance of Precipitation