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.

Overcast

23°F

-5°C

Humidity 83%
Wind Speed SW 8 mph
Barometer 29.77 in (1009.9 mb)
Dewpoint 19°F (-7°C)
Visibility 7.00 mi
Wind Chill14°F (-10°C)
Last update 21 Jan 1:55 pm CST
Extended Forecast for

Sparta WI

Extreme Cold Watch January 23, 11:00am until January 24, 12:00pm
Extreme Cold Warning January 23, 12:00am until January 23, 11:00am
Click here for hazard details and duration
Extreme Cold Watch
Extreme Cold Warning

  • This Afternoon

    This Afternoon: Snow. High near 24. Southwest wind 8 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. Total daytime snow accumulation of around an inch possible.

    High: 24 °F

    Snow

  • Tonight

    Tonight: Snow likely, mainly before 9pm. Mostly cloudy, with a low around 4. Wind chill values as low as -7. West wind 6 to 14 mph, with gusts as high as 32 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 4 °F

    Snow Likely
    then Mostly
    Cloudy

  • Thursday

    Thursday: A chance of flurries between 7am and 4pm. Partly sunny, with a high near 14. Wind chill values as low as -10. West wind 5 to 14 mph, with gusts as high as 29 mph.

    High: 14 °F

    Chance
    Flurries

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -19. Wind chill values as low as -36. Northwest wind 7 to 10 mph, with gusts as high as 28 mph.

    Low: -19 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny and cold, with a high near -6. Northwest wind 3 to 8 mph. Winds could gust as high as 18 mph.

    High: -6 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around -19. Calm wind.

    Low: -19 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny and cold, with a high near 1. Calm wind.

    High: 1 °F

    Cold

  • Saturday Night

    Saturday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around -10. Calm wind.

    Low: -10 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Sunday

    Sunday: A 20 percent chance of snow before noon. Partly sunny, with a high near 8. Light and variable wind.

    High: 8 °F

    Slight Chance
    Snow then
    Partly Sunny

Detailed Forecast

This Afternoon
Snow. High near 24. Southwest wind 8 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. Total daytime snow accumulation of around an inch possible.
Tonight
Snow likely, mainly before 9pm. Mostly cloudy, with a low around 4. Wind chill values as low as -7. West wind 6 to 14 mph, with gusts as high as 32 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Thursday
A chance of flurries between 7am and 4pm. Partly sunny, with a high near 14. Wind chill values as low as -10. West wind 5 to 14 mph, with gusts as high as 29 mph.
Thursday Night
Partly cloudy, with a low around -19. Wind chill values as low as -36. Northwest wind 7 to 10 mph, with gusts as high as 28 mph.
Friday
Mostly sunny and cold, with a high near -6. Northwest wind 3 to 8 mph. Winds could gust as high as 18 mph.
Friday Night
Partly cloudy, with a low around -19. Calm wind.
Saturday
Partly sunny and cold, with a high near 1. Calm wind.
Saturday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around -10. Calm wind.
Sunday
A 20 percent chance of snow before noon. Partly sunny, with a high near 8. Light and variable wind.
Sunday Night
Mostly cloudy, with a low around -10. Calm wind.
Monday
Mostly sunny, with a high near 10. Calm wind becoming west 5 to 7 mph in the morning.
Monday Night
Partly cloudy, with a low around -1. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 20. Calm wind becoming west around 6 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.93°N 90.81°W
Last Update:
2:06 pm CST Jan 21, 2026
Forecast Valid:
2pm CST Jan 21, 2026-6pm CST Jan 27, 2026
 
Forecast Discussion
 
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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