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

20°F

-7°C

Humidity 92%
Wind Speed Calm
Barometer 29.89 in (1013.5 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Last update 15 Feb 5:55 am CST
Extended Forecast for

2 Miles N Ontario WI

  • Today

    Today: Sunny, with a high near 55. Light and variable wind.

    High: 55 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 37. Calm wind becoming south around 6 mph after midnight. Winds could gust as high as 18 mph.

    Low: 37 °F

    Partly Cloudy

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 60. West wind 5 to 9 mph becoming calm in the afternoon. Winds could gust as high as 18 mph.

    High: 60 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 34. Light and variable wind.

    Low: 34 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain after noon. Partly sunny, with a high near 51. East wind 5 to 15 mph, with gusts as high as 28 mph.

    High: 51 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: Rain likely, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 41. East wind 7 to 14 mph becoming south after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 41 °F

    Rain Likely

  • Wednesday

    Wednesday: A 50 percent chance of rain. Mostly sunny, with a high near 54. Breezy, with a south wind 7 to 16 mph becoming west in the afternoon. Winds could gust as high as 25 mph.

    High: 54 °F

    Chance Rain
    and Breezy

  • Wednesday Night

    Wednesday Night: A slight chance of rain and snow before midnight. Partly cloudy, with a low around 28. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 20%.

    Low: 28 °F

    Slight Chance
    Rain/Snow
    then Partly
    Cloudy

  • Thursday

    Thursday: A chance of rain and snow after noon. Mostly sunny, with a high near 44. Light and variable wind becoming north 5 to 8 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 30%.

    High: 44 °F

    Mostly Sunny
    then Chance
    Rain/Snow

Detailed Forecast

Today
Sunny, with a high near 55. Light and variable wind.
Tonight
Partly cloudy, with a low around 37. Calm wind becoming south around 6 mph after midnight. Winds could gust as high as 18 mph.
Washington's Birthday
Mostly sunny, with a high near 60. West wind 5 to 9 mph becoming calm in the afternoon. Winds could gust as high as 18 mph.
Monday Night
Partly cloudy, with a low around 34. Light and variable wind.
Tuesday
A 20 percent chance of rain after noon. Partly sunny, with a high near 51. East wind 5 to 15 mph, with gusts as high as 28 mph.
Tuesday Night
Rain likely, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 41. East wind 7 to 14 mph becoming south after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
A 50 percent chance of rain. Mostly sunny, with a high near 54. Breezy, with a south wind 7 to 16 mph becoming west in the afternoon. Winds could gust as high as 25 mph.
Wednesday Night
A slight chance of rain and snow before midnight. Partly cloudy, with a low around 28. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 20%.
Thursday
A chance of rain and snow after noon. Mostly sunny, with a high near 44. Light and variable wind becoming north 5 to 8 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 30%.
Thursday Night
A chance of rain and snow before midnight, then a chance of snow. Mostly cloudy, with a low around 24. Northeast wind around 8 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.
Friday
A 40 percent chance of snow. Mostly cloudy, with a high near 34. Northwest wind 7 to 10 mph, with gusts as high as 20 mph.
Friday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 16. Northwest wind 3 to 6 mph.
Saturday
Mostly sunny, with a high near 30. Northwest wind 3 to 7 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:
6:06 am CST Feb 15, 2026
Forecast Valid:
6am CST Feb 15, 2026-6pm CST Feb 21, 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