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

55°F

13°C

Humidity 44%
Wind Speed Calm
Barometer 30.03 in (1018.0 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 4 Mar 3:55 pm CST
Extended Forecast for

2 Miles N Ontario WI

  • Tonight

    Tonight: Increasing clouds, with a low around 33. Calm wind.

    Low: 33 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy, with a high near 48. Calm wind becoming east around 6 mph.

    High: 48 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 37. Calm wind becoming southeast around 5 mph after midnight.

    Low: 37 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: Showers, with thunderstorms also possible after noon. High near 63. South wind 6 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 63 °F

    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before midnight, then showers likely. Low around 35. South wind 6 to 10 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 35 °F

    Showers

  • Saturday

    Saturday: A 20 percent chance of showers before noon. Mostly sunny, with a high near 49. Northwest wind 5 to 10 mph, with gusts as high as 21 mph.

    High: 49 °F

    Slight Chance
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 31. Light west wind becoming southwest 5 to 9 mph in the evening. Winds could gust as high as 21 mph.

    Low: 31 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 60. Southwest wind 9 to 15 mph, with gusts as high as 24 mph.

    High: 60 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 40. Southwest wind 6 to 8 mph, with gusts as high as 18 mph.

    Low: 40 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 33. Calm wind.
Thursday
Mostly cloudy, with a high near 48. Calm wind becoming east around 6 mph.
Thursday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 37. Calm wind becoming southeast around 5 mph after midnight.
Friday
Showers, with thunderstorms also possible after noon. High near 63. South wind 6 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers and possibly a thunderstorm before midnight, then showers likely. Low around 35. South wind 6 to 10 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Saturday
A 20 percent chance of showers before noon. Mostly sunny, with a high near 49. Northwest wind 5 to 10 mph, with gusts as high as 21 mph.
Saturday Night
Mostly clear, with a low around 31. Light west wind becoming southwest 5 to 9 mph in the evening. Winds could gust as high as 21 mph.
Sunday
Sunny, with a high near 60. Southwest wind 9 to 15 mph, with gusts as high as 24 mph.
Sunday Night
Mostly clear, with a low around 40. Southwest wind 6 to 8 mph, with gusts as high as 18 mph.
Monday
Sunny, with a high near 68. Southwest wind 6 to 13 mph, with gusts as high as 21 mph.
Monday Night
A 20 percent chance of showers. Partly cloudy, with a low around 38. West wind around 7 mph becoming east after midnight.
Tuesday
Showers likely. Partly sunny, with a high near 56. East wind 7 to 13 mph becoming south in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 60%.
Tuesday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 23. East wind around 10 mph becoming north after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 50%.
Wednesday
A 30 percent chance of snow showers. Partly sunny, with a high near 35. North 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:
2:57 pm CST Mar 4, 2026
Forecast Valid:
4pm CST Mar 4, 2026-6pm CDT Mar 11, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation