National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Fair

41°F

5°C

Humidity 61%
Wind Speed Calm
Barometer 29.96 in (1015.8 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 18 Mar 6:55 pm CDT
Extended Forecast for

2 Miles N Ontario WI

  • Tonight

    Tonight: Mostly cloudy, with a low around 31. Calm wind.

    Low: 31 °F

    Mostly Cloudy

  • Thursday

    Thursday: Patchy fog before noon. Otherwise, partly sunny, with a high near 48. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 48 °F

    Patchy Fog
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 35. Light and variable wind becoming southwest 5 to 7 mph after midnight.

    Low: 35 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 59. Light and variable wind becoming northwest 5 to 7 mph in the morning.

    High: 59 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 35. Calm wind.

    Low: 35 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 66. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 66 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 35. Southwest wind around 7 mph becoming northeast after midnight.

    Low: 35 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 46. Northeast wind 8 to 10 mph, with gusts as high as 20 mph.

    High: 46 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 22. North wind 5 to 7 mph becoming calm after midnight.

    Low: 22 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 31. Calm wind.
Thursday
Patchy fog before noon. Otherwise, partly sunny, with a high near 48. Calm wind becoming southeast around 5 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 35. Light and variable wind becoming southwest 5 to 7 mph after midnight.
Friday
Partly sunny, with a high near 59. Light and variable wind becoming northwest 5 to 7 mph in the morning.
Friday Night
Mostly cloudy, with a low around 35. Calm wind.
Saturday
Mostly sunny, with a high near 66. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 35. Southwest wind around 7 mph becoming northeast after midnight.
Sunday
Mostly cloudy, with a high near 46. Northeast wind 8 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 22. North wind 5 to 7 mph becoming calm after midnight.
Monday
Sunny, with a high near 44. Calm wind becoming east around 6 mph in the morning.
Monday Night
Mostly cloudy, with a low around 28. South wind 3 to 6 mph.
Tuesday
Partly sunny, with a high near 51. Southwest wind 5 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 31. Light and variable wind.
Wednesday
A slight chance of rain and snow. Mostly cloudy, with a high near 56. South wind 5 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Ontario WI
 43.75°N 90.58°W
Last Update:
6:16 pm CDT Mar 18, 2026
Forecast Valid:
7pm CDT Mar 18, 2026-6pm CDT Mar 25, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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