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.

Fair

50°F

10°C

Humidity 72%
Wind Speed Calm
Barometer 29.58 in (1002.1 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 21 Mar 9:55 pm CDT
Extended Forecast for

2 Miles N Ontario WI

  • Tonight

    Tonight: Increasing clouds, with a low around 38. Calm wind becoming north around 6 mph after midnight.

    Low: 38 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A chance of sprinkles before 7am. Partly sunny, with a high near 48. North wind 6 to 9 mph, with gusts as high as 20 mph.

    High: 48 °F

    Chance
    Sprinkles

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 23. North wind around 5 mph becoming calm in the evening.

    Low: 23 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 50. Calm wind.

    High: 50 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 34. Calm wind becoming south around 5 mph after midnight.

    Low: 34 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 56. Southwest wind 3 to 7 mph.

    High: 56 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36. Calm wind becoming southeast around 5 mph after midnight.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 56. East wind 5 to 7 mph.

    High: 56 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 39. Southeast wind 3 to 5 mph.

    Low: 39 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 38. Calm wind becoming north around 6 mph after midnight.
Sunday
A chance of sprinkles before 7am. Partly sunny, with a high near 48. North wind 6 to 9 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 23. North wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 50. Calm wind.
Monday Night
Mostly cloudy, with a low around 34. Calm wind becoming south around 5 mph after midnight.
Tuesday
Mostly cloudy, with a high near 56. Southwest wind 3 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 36. Calm wind becoming southeast around 5 mph after midnight.
Wednesday
A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 56. East wind 5 to 7 mph.
Wednesday Night
Mostly cloudy, with a low around 39. Southeast wind 3 to 5 mph.
Thursday
A 30 percent chance of showers before 1pm. Partly sunny, with a high near 58. Southwest wind 5 to 11 mph becoming northwest in the morning. Winds could gust as high as 21 mph.
Thursday Night
Partly cloudy, with a low around 24. North wind 6 to 9 mph, with gusts as high as 20 mph.
Friday
Mostly sunny, with a high near 43. North wind 5 to 7 mph.
Friday Night
Mostly clear, with a low around 24. Northwest wind around 5 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 51. Light southwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Ontario WI
 43.75°N 90.58°W
Last Update:
10:16 pm CDT Mar 21, 2026
Forecast Valid:
10pm CDT Mar 21, 2026-6pm CDT Mar 28, 2026
 
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Additional Resources

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Chance of Precipitation