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

9°F

-13°C

Humidity 59%
Wind Speed Calm
Barometer 30.56 in (1037.7 mb)
Dewpoint -2°F (-19°C)
Visibility 10.00 mi
Last update 30 Jan 7:55 pm CST
Extended Forecast for

2 Miles N Ontario WI

  • Tonight

    Tonight: Mostly cloudy, with a low around -1. Wind chill values as low as -9. Northwest wind 5 to 8 mph, with gusts as high as 18 mph.

    Low: -1 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 22. Wind chill values as low as -9. Northwest wind around 5 mph becoming calm in the afternoon.

    High: 22 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 3. Light and variable wind.

    Low: 3 °F

    Partly Cloudy

  • Sunday

    Sunday: Snow likely. Partly sunny, with a high near 24. Wind chill values as low as -1. South wind 5 to 9 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 24 °F

    Snow Likely

  • Sunday Night

    Sunday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 13. Light and variable wind.

    Low: 13 °F

    Chance Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 26. Calm wind becoming northwest around 6 mph.

    High: 26 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 11. Calm wind.

    Low: 11 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of snow. Mostly sunny, with a high near 26. Light northeast wind.

    High: 26 °F

    Slight Chance
    Snow

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 8. Calm wind.

    Low: 8 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around -1. Wind chill values as low as -9. Northwest wind 5 to 8 mph, with gusts as high as 18 mph.
Saturday
Sunny, with a high near 22. Wind chill values as low as -9. Northwest wind around 5 mph becoming calm in the afternoon.
Saturday Night
Partly cloudy, with a low around 3. Light and variable wind.
Sunday
Snow likely. Partly sunny, with a high near 24. Wind chill values as low as -1. South wind 5 to 9 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Sunday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 13. Light and variable wind.
Monday
Mostly sunny, with a high near 26. Calm wind becoming northwest around 6 mph.
Monday Night
Mostly cloudy, with a low around 11. Calm wind.
Tuesday
A 20 percent chance of snow. Mostly sunny, with a high near 26. Light northeast wind.
Tuesday Night
Mostly cloudy, with a low around 8. Calm wind.
Wednesday
Mostly sunny, with a high near 26. Light and variable wind.
Wednesday Night
Mostly cloudy, with a low around 11. Calm wind.
Thursday
A 20 percent chance of snow. Partly sunny, with a high near 31. Calm wind becoming southwest 5 to 8 mph in the morning.
Thursday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 20. Southwest wind around 7 mph becoming northwest after midnight.
Friday
A 20 percent chance of snow. Partly sunny, with a high near 31. Northwest wind 7 to 11 mph, with gusts as high as 21 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:
7:48 pm CST Jan 30, 2026
Forecast Valid:
9pm CST Jan 30, 2026-6pm CST Feb 6, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation