Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

A Few Clouds

12°F

-11°C

Humidity 51%
Wind Speed Calm
Barometer 30.15 in (1024.3 mb)
Dewpoint -3°F (-19°C)
Visibility 10.00 mi
Last update 20 Jan 4:55 pm CST
Extended Forecast for

Sparta WI

Extreme Cold Watch January 23, 12:00am until January 24, 12:00pm
Click here for hazard details and duration
Extreme Cold Watch
  • Tonight

    Tonight: Snow likely before 4am, then a chance of flurries between 4am and 5am.  Cloudy, with a low around 8. Light and variable wind.  Chance of precipitation is 60%. Total nighttime snow accumulation of less than one inch possible.

    Low: 8 °F

    Snow Likely

  • Wednesday

    Wednesday: Snow, mainly after 1pm.  High near 24. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.  Chance of precipitation is 100%. New snow accumulation of around an inch possible.

    High: 24 °F

    Mostly Cloudy
    then Snow

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow before 9pm.  Mostly cloudy, with a low around 2. West wind 5 to 11 mph, with gusts as high as 28 mph.

    Low: 2 °F

    Chance Snow
    then Partly
    Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 13. Wind chill values as low as -6. Light west wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 22 mph.

    High: 13 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -18. Northwest wind 6 to 9 mph, with gusts as high as 21 mph.

    Low: -18 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny and cold, with a high near -6. Northwest wind 3 to 8 mph.

    High: -6 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around -21. Calm wind.

    Low: -21 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny and cold, with a high near 2. Calm wind.

    High: 2 °F

    Cold

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around -10. Calm wind.

    Low: -10 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Snow likely before 4am, then a chance of flurries between 4am and 5am. Cloudy, with a low around 8. Light and variable wind. Chance of precipitation is 60%. Total nighttime snow accumulation of less than one inch possible.
Wednesday
Snow, mainly after 1pm. High near 24. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New snow accumulation of around an inch possible.
Wednesday Night
A 30 percent chance of snow before 9pm. Mostly cloudy, with a low around 2. West wind 5 to 11 mph, with gusts as high as 28 mph.
Thursday
Partly sunny, with a high near 13. Wind chill values as low as -6. Light west wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 22 mph.
Thursday Night
Partly cloudy, with a low around -18. Northwest wind 6 to 9 mph, with gusts as high as 21 mph.
Friday
Mostly sunny and cold, with a high near -6. Northwest wind 3 to 8 mph.
Friday Night
Partly cloudy, with a low around -21. Calm wind.
Saturday
Mostly sunny and cold, with a high near 2. Calm wind.
Saturday Night
Mostly cloudy, with a low around -10. Calm wind.
Sunday
Partly sunny, with a high near 8. Light west wind.
Sunday Night
Partly cloudy, with a low around -8. Calm wind.
Monday
Mostly sunny, with a high near 15. Calm wind becoming west around 6 mph in the morning.
Monday Night
Partly cloudy, with a low around 2. Light southwest wind.
Tuesday
Partly sunny, with a high near 21. Calm wind becoming west around 5 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.93°N 90.81°W
4:36 pm CST Jan 20, 2026
5pm CST Jan 20, 2026-6pm CST Jan 27, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database