Hazardous Weather Conditions

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Light Rain Fog/Mist

69°F

21°C

Humidity 96%
Wind Speed Calm
Barometer 29.95 in (1014.2 mb)
Dewpoint 68°F (20°C)
Visibility 6.00 mi
Last update 13 Aug 9:55 am CDT
Extended Forecast for

3 Miles S Ontario WI

  • Today

    Today: Showers and thunderstorms likely before 4pm, then a chance of showers.  Mostly cloudy, with a steady temperature around 74. Calm wind becoming east around 5 mph in the afternoon.  Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 74 °F

    Showers
    Likely

  • Tonight

    Tonight: A 30 percent chance of showers, mainly before 8pm.  Mostly cloudy, with a low around 61. Calm wind.

    Low: 61 °F

    Chance
    Showers then
    Mostly Cloudy

  • Friday

    Friday: A slight chance of showers, then a chance of showers and thunderstorms after 4pm.  Partly sunny, with a high near 79. East wind 5 to 9 mph, with gusts as high as 18 mph.  Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am.  Low around 62. East wind 5 to 8 mph, with gusts as high as 20 mph.  Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 62 °F

    Chance
    Showers then
    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm.  Mostly cloudy, with a high near 81. Southeast wind around 5 mph becoming light and variable  in the afternoon.  Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 81 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms.  Mostly cloudy, with a low around 66. Calm wind.  Chance of precipitation is 20%.

    Low: 66 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm.  Partly sunny, with a high near 81. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 81 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 58. Light north wind.

    Low: 58 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 80. Calm wind.

    High: 80 °F

    Sunny

Detailed Forecast

Today
Showers and thunderstorms likely before 4pm, then a chance of showers. Mostly cloudy, with a steady temperature around 74. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A 30 percent chance of showers, mainly before 8pm. Mostly cloudy, with a low around 61. Calm wind.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 79. East wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 62. East wind 5 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 81. Southeast wind around 5 mph becoming light and variable in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 20%.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. Calm wind becoming northwest around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 58. Light north wind.
Monday
Sunny, with a high near 80. Calm wind.
Monday Night
Partly cloudy, with a low around 58. Calm wind.
Tuesday
A 20 percent chance of showers. Partly sunny, with a high near 80. Calm wind becoming southwest around 6 mph in the afternoon.
Tuesday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 62. Light southwest wind. Chance of precipitation is 60%.
Wednesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 78. Calm wind becoming west around 6 mph in the afternoon.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Ontario WI
 43.69°N 90.59°W
10:28 am CDT Aug 13, 2026
10am CDT Aug 13, 2026-6pm CDT Aug 19, 2026
 
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Additional Resources

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