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.

Partly Cloudy

36°F

2°C

Humidity 80%
Wind Speed Calm
Barometer 29.89 in (1013.2 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 16 Feb 6:55 pm CST
Extended Forecast for

2 Miles N Ontario WI

  • Tonight

    Tonight: Partly cloudy, with a low around 35. Light east wind.

    Low: 35 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain after 4pm. Mostly cloudy, with a high near 52. East wind 5 to 14 mph, with gusts as high as 29 mph.

    High: 52 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: Rain and thunderstorms likely before 3am, then a chance of rain. Mostly cloudy, with a low around 42. East wind 6 to 14 mph becoming southwest after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 42 °F

    Rain Likely

  • Wednesday

    Wednesday: Sunny, with a high near 56. Breezy, with a west wind 8 to 18 mph, with gusts as high as 30 mph.

    High: 56 °F

    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 30. West wind around 6 mph becoming calm in the evening.

    Low: 30 °F

    Mostly Clear

  • Thursday

    Thursday: A 30 percent chance of rain after noon. Mostly sunny, with a high near 48. Calm wind becoming northeast 5 to 8 mph in the morning. Winds could gust as high as 18 mph.

    High: 48 °F

    Mostly Sunny
    then Chance
    Rain

  • Thursday Night

    Thursday Night: Snow likely, possibly mixed with rain. Mostly cloudy, with a low around 28. Northeast wind around 9 mph becoming north after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%.

    Low: 28 °F

    Rain/Snow
    Likely

  • Friday

    Friday: A 50 percent chance of snow. Mostly cloudy, with a high near 36. Northwest wind 8 to 11 mph, with gusts as high as 20 mph.

    High: 36 °F

    Chance Snow

  • Friday Night

    Friday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 20. Northwest wind 3 to 7 mph.

    Low: 20 °F

    Slight Chance
    Snow then
    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 35. Light east wind.
Tuesday
A 20 percent chance of rain after 4pm. Mostly cloudy, with a high near 52. East wind 5 to 14 mph, with gusts as high as 29 mph.
Tuesday Night
Rain and thunderstorms likely before 3am, then a chance of rain. Mostly cloudy, with a low around 42. East wind 6 to 14 mph becoming southwest after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Sunny, with a high near 56. Breezy, with a west wind 8 to 18 mph, with gusts as high as 30 mph.
Wednesday Night
Mostly clear, with a low around 30. West wind around 6 mph becoming calm in the evening.
Thursday
A 30 percent chance of rain after noon. Mostly sunny, with a high near 48. Calm wind becoming northeast 5 to 8 mph in the morning. Winds could gust as high as 18 mph.
Thursday Night
Snow likely, possibly mixed with rain. Mostly cloudy, with a low around 28. Northeast wind around 9 mph becoming north after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%.
Friday
A 50 percent chance of snow. Mostly cloudy, with a high near 36. Northwest wind 8 to 11 mph, with gusts as high as 20 mph.
Friday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 20. Northwest wind 3 to 7 mph.
Saturday
Mostly sunny, with a high near 33. Northwest wind 3 to 7 mph.
Saturday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 16. Light northwest wind.
Sunday
Mostly sunny, with a high near 30. Northwest wind 3 to 8 mph.
Sunday Night
Partly cloudy, with a low around 12. Northwest wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 32. Calm wind becoming northwest around 6 mph in the afternoon.
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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:
5:31 pm CST Feb 16, 2026
Forecast Valid:
7pm CST Feb 16, 2026-6pm CST Feb 23, 2026
 
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