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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

High: 74 °F
Showers
LikelyTonight
Low: 61 °F
Chance
Showers then
Mostly CloudyFriday

High: 79 °F
Chance
ShowersFriday Night
Low: 62 °F
Chance
Showers then
ShowersSaturday

High: 81 °F
Showers
LikelySaturday Night
Low: 66 °F
Slight Chance
T-storms then
Slight Chance
ShowersSunday
High: 81 °F
Mostly Cloudy
then Slight
Chance
T-stormsSunday Night

Low: 58 °F
Mostly Clear
Monday

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.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
3 Miles S Ontario WI
43.69°N 90.59°W
43.69°N 90.59°W
10:28 am CDT Aug 13, 2026
10am CDT Aug 13, 2026-6pm CDT Aug 19, 2026



