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

25°F

-4°C

Humidity 94%
Wind Speed Calm
Barometer 30.48 in (1033.5 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 17 Oct 6:55 am CDT
Extended Forecast for

2 Miles N Ontario WI

Freeze Warning until October 17, 09:00am
Click here for hazard details and duration
...
  •  
    Freeze Warning until October 17, 09:00am

    NOW until 9:00am Sat

    Freeze Warning

  • Today

    High: 58 °F

    Frost and
    Areas Fog
    then Sunny

  • Tonight

    Tonight: Clear, with a low around 37. South wind 8 to 10 mph, with gusts as high as 25 mph.

    Low: 37 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 64. Breezy, with a southwest wind 11 to 16 mph, with gusts as high as 30 mph.

    High: 64 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36. South wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 24 mph.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 66. Calm wind becoming south around 5 mph in the afternoon.

    High: 66 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 39. Calm wind.

    Low: 39 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 68. Calm wind becoming south around 5 mph in the afternoon.

    High: 68 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Clear

Detailed Forecast

Today
Areas of fog before 9am. Widespread frost, mainly before 9am. Otherwise, partly sunny through mid morning, then becoming sunny, with a high near 58. Light south wind becoming southwest 9 to 14 mph in the morning. Winds could gust as high as 23 mph.
Tonight
Clear, with a low around 37. South wind 8 to 10 mph, with gusts as high as 25 mph.
Sunday
Sunny, with a high near 64. Breezy, with a southwest wind 11 to 16 mph, with gusts as high as 30 mph.
Sunday Night
Mostly clear, with a low around 36. South wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 24 mph.
Monday
Sunny, with a high near 66. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 39. Calm wind.
Tuesday
Sunny, with a high near 68. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 44. Calm wind.
Wednesday
Mostly sunny, with a high near 72. Calm wind becoming south 5 to 7 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 49. Calm wind.
Thursday
Mostly sunny, with a high near 75. Light south wind.
Thursday Night
Partly cloudy, with a low around 49. Calm wind.
Friday
Mostly sunny, with a high near 75. Calm wind becoming south 5 to 9 mph in the morning. Winds could gust as high as 20 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:
5:41 am CDT Oct 17, 2026
Forecast Valid:
7am CDT Oct 17, 2026-6pm CDT Oct 23, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation