Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Mostly Cloudy

77°F

25°C

Humidity 40%
Wind Speed Calm
Barometer 30.13 in (1020.6 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 23 Jun 2:55 pm CDT
Extended Forecast for

Ontario WI

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2am.  Low around 59. South wind around 5 mph becoming calm.  Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 59 °F

    Chance
    T-storms then
    Showers

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly before 2pm, then showers likely and possibly a thunderstorm after 5pm.  Cloudy through mid morning, then gradual clearing, with a high near 79. Southwest wind around 7 mph becoming west in the afternoon.  Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 79 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 11pm.  Partly cloudy, with a low around 54. Light north wind.  Chance of precipitation is 30%.

    Low: 54 °F

    Chance
    Showers then
    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 76. Light northwest wind.

    High: 76 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54. Calm wind.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 78. Calm wind becoming east around 5 mph.

    High: 78 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 56. Calm wind.

    Low: 56 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 82. Calm wind becoming southeast 5 to 7 mph in the morning.

    High: 82 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am.  Partly cloudy, with a low around 63. Southeast wind around 7 mph, with gusts as high as 20 mph.

    Low: 63 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Low around 59. South wind around 5 mph becoming calm. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Showers and thunderstorms likely, mainly before 2pm, then showers likely and possibly a thunderstorm after 5pm. Cloudy through mid morning, then gradual clearing, with a high near 79. Southwest wind around 7 mph becoming west in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 11pm. Partly cloudy, with a low around 54. Light north wind. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 76. Light northwest wind.
Thursday Night
Mostly clear, with a low around 54. Calm wind.
Friday
Mostly sunny, with a high near 78. Calm wind becoming east around 5 mph.
Friday Night
Partly cloudy, with a low around 56. Calm wind.
Saturday
Mostly sunny, with a high near 82. Calm wind becoming southeast 5 to 7 mph in the morning.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 63. Southeast wind around 7 mph, with gusts as high as 20 mph.
Sunday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 87. Breezy, with a southeast wind 8 to 16 mph, with gusts as high as 25 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71. South wind 7 to 14 mph, with gusts as high as 24 mph.
Monday
Mostly sunny, with a high near 92. South wind 7 to 15 mph, with gusts as high as 24 mph.
Monday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70. South wind 6 to 13 mph, with gusts as high as 23 mph.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90. Southwest wind 5 to 8 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario WI
 43.73°N 90.58°W
1:26 pm CDT Jun 23, 2026
3pm CDT Jun 23, 2026-6pm CDT Jun 30, 2026
 
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Additional Resources

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