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

26°F

-3°C

Humidity 88%
Wind Speed Calm
Barometer 30.25 in (1025.9 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 11 Feb 10:55 pm CST
Extended Forecast for

2 Miles N Ontario WI

  • Tonight

    Tonight: Mostly cloudy, with a low around 22. Calm wind.

    Low: 22 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 45. South wind 3 to 6 mph.

    High: 45 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 27. Calm wind.

    Low: 27 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 51. Calm wind becoming southwest around 6 mph.

    High: 51 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 26. Calm wind.

    Low: 26 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 54. Calm wind becoming south around 5 mph.

    High: 54 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 31. Calm wind.

    Low: 31 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 53. Calm wind becoming west around 5 mph.

    High: 53 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 32. Calm wind.

    Low: 32 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 22. Calm wind.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 45. South wind 3 to 6 mph.
Thursday Night
Mostly clear, with a low around 27. Calm wind.
Friday
Sunny, with a high near 51. Calm wind becoming southwest around 6 mph.
Friday Night
Mostly clear, with a low around 26. Calm wind.
Saturday
Sunny, with a high near 54. Calm wind becoming south around 5 mph.
Saturday Night
Mostly clear, with a low around 31. Calm wind.
Sunday
Sunny, with a high near 53. Calm wind becoming west around 5 mph.
Sunday Night
Partly cloudy, with a low around 32. Calm wind.
Washington's Birthday
Partly sunny, with a high near 54. Calm wind becoming south 5 to 8 mph in the morning.
Monday Night
Mostly cloudy, with a low around 38. Southeast wind around 5 mph.
Tuesday
A 30 percent chance of rain. Mostly cloudy, with a high near 56. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Rain likely. Mostly cloudy, with a low around 40. Southeast wind around 8 mph becoming southwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%.
Wednesday
A 40 percent chance of rain. Mostly sunny, with a high near 52. West wind 7 to 11 mph, with gusts as high as 20 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:
11:11 pm CST Feb 11, 2026
Forecast Valid:
11pm CST Feb 11, 2026-6pm CST Feb 18, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation