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

58°F

14°C

Humidity 42%
Wind Speed NW 15 G 20 mph
Barometer 29.87 in (1012.1 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 31 Mar 2:55 pm CDT
Extended Forecast for

2 Miles N Ontario WI

  • Tonight

    Tonight: Partly cloudy, with a low around 32. Northwest wind 5 to 14 mph becoming northeast after midnight. Winds could gust as high as 23 mph.

    Low: 32 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 10 percent chance of showers after 5pm. Partly sunny, with a high near 47. East wind 5 to 13 mph, with gusts as high as 22 mph.

    High: 47 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Rain showers, possibly mixed with sleet, becoming all rain after 4am. The sleet could be heavy at times. Some thunder is also possible. Low around 31. East wind around 14 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New sleet accumulation of less than a half inch possible.

    Low: 31 °F

    Rain/Sleet

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 61. Breezy, with an east wind 13 to 16 mph becoming south in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 61 °F

    Showers and
    Breezy

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 32. Breezy, with a west wind 8 to 16 mph, with gusts as high as 28 mph.

    Low: 32 °F

    Chance
    Showers and
    Breezy

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 56. Light and variable wind becoming east 5 to 7 mph in the afternoon. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 56 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 36. East wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.

    Low: 36 °F

    Showers

  • Saturday

    Saturday: A 50 percent chance of showers. Mostly cloudy, with a high near 46. Breezy, with a northeast wind 11 to 18 mph becoming west in the afternoon. Winds could gust as high as 26 mph.

    High: 46 °F

    Chance
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: A slight chance of rain and snow showers before 1am. Mostly cloudy, with a low around 27. Breezy, with a northwest wind 14 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.

    Low: 27 °F

    Slight Chance
    Rain/Snow and
    Breezy

Detailed Forecast

Tonight
Partly cloudy, with a low around 32. Northwest wind 5 to 14 mph becoming northeast after midnight. Winds could gust as high as 23 mph.
Wednesday
A 10 percent chance of showers after 5pm. Partly sunny, with a high near 47. East wind 5 to 13 mph, with gusts as high as 22 mph.
Wednesday Night
Rain showers, possibly mixed with sleet, becoming all rain after 4am. The sleet could be heavy at times. Some thunder is also possible. Low around 31. East wind around 14 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New sleet accumulation of less than a half inch possible.
Thursday
Showers and possibly a thunderstorm. High near 61. Breezy, with an east wind 13 to 16 mph becoming south in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 32. Breezy, with a west wind 8 to 16 mph, with gusts as high as 28 mph.
Friday
A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 56. Light and variable wind becoming east 5 to 7 mph in the afternoon. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and possibly a thunderstorm. Low around 36. East wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.
Saturday
A 50 percent chance of showers. Mostly cloudy, with a high near 46. Breezy, with a northeast wind 11 to 18 mph becoming west in the afternoon. Winds could gust as high as 26 mph.
Saturday Night
A slight chance of rain and snow showers before 1am. Mostly cloudy, with a low around 27. Breezy, with a northwest wind 14 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 49. Northwest wind 13 to 15 mph, with gusts as high as 24 mph.
Sunday Night
Mostly clear, with a low around 27. Northwest wind 5 to 8 mph becoming light and variable in the evening.
Monday
A slight chance of rain and snow showers. Partly sunny, with a high near 55. South wind 5 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 33. West wind around 7 mph becoming north after midnight.
Tuesday
Partly sunny, with a high near 54. North wind 7 to 10 mph, with gusts as high as 18 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Ontario WI
 43.75°N 90.58°W
Last Update:
2:46 pm CDT Mar 31, 2026
Forecast Valid:
3pm CDT Mar 31, 2026-6pm CDT Apr 7, 2026
 
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Additional Resources

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