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.

A Few Clouds

71°F

22°C

Humidity 51%
Wind Speed W 9 mph
Barometer 29.68 in (1005.2 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 16 May 5:55 pm CDT
Extended Forecast for

Ontario WI

  • Tonight

    Tonight: Mostly clear, with a low around 48. Northwest wind around 6 mph becoming calm in the evening.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 79. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 79 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 55. South wind around 6 mph becoming calm.

    Low: 55 °F

    Clear

  • Saturday

    Saturday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Sunny, with a high near 83. South wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.

    High: 83 °F

    Sunny then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 53. Light and variable wind. Chance of precipitation is 20%.

    Low: 53 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 78. Light and variable wind.

    High: 78 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 60. Calm wind becoming south around 6 mph after midnight.

    Low: 60 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Monday

    Monday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 78. South wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 78 °F

    Chance
    T-storms then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 58. South wind around 5 mph becoming calm. Chance of precipitation is 70%.

    Low: 58 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 48. Northwest wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 79. Calm wind becoming south 5 to 7 mph in the afternoon.
Friday Night
Clear, with a low around 55. South wind around 6 mph becoming calm.
Saturday
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Sunny, with a high near 83. South wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.
Saturday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 53. Light and variable wind. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 78. Light and variable wind.
Sunday Night
A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 60. Calm wind becoming south around 6 mph after midnight.
Monday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 78. South wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 58. South wind around 5 mph becoming calm. Chance of precipitation is 70%.
Tuesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 74. Northeast wind 6 to 9 mph becoming west in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 50. Northwest wind around 7 mph.
Wednesday
A 30 percent chance of showers. Sunny, with a high near 71. West wind 6 to 13 mph, with gusts as high as 21 mph.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 50. West wind 3 to 7 mph.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 72. Light west wind increasing to 5 to 9 mph in the morning.
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario WI
 43.73°N 90.58°W
Last Update:
5:30 pm CDT May 16, 2024
Forecast Valid:
6pm CDT May 16, 2024-6pm CDT May 23, 2024
 
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