National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Winter Storm to Impact the Region Sunday Afternoon - Monday Morning

A strong winter storm moves through the region Sunday afternoon through Monday morning. The combination of moderate to heavy snow, strong northwest winds, and falling temperatures may lead to hazardous travel conditions for much of the area. The greatest impacts in Wisconsin are expected to be along and north of I-90, while blizzard conditions are possible west of the Mississippi River. Read More >

Hazardous Weather Conditions

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Overcast

35°F

2°C

Humidity 95%
Wind Speed Calm
Barometer 29.90 in (1013.7 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 27 Dec 7:55 am CST
Extended Forecast for

Sparta WI

Winter Storm Watch December 28, 03:00pm until December 29, 12:00pm
Click here for hazard details and duration
Winter Storm Watch

  • Today

    Today: Patchy drizzle after 5pm. Areas of fog before 2pm. Otherwise, cloudy, with a high near 42. Calm wind becoming south 5 to 7 mph.

    High: 42 °F

    Areas Fog
    then Patchy
    Drizzle and
    Patchy Fog

  • Tonight

    Tonight: Patchy drizzle before 3am. Cloudy, with a low around 37. Light and variable wind.

    Low: 37 °F

    Patchy
    Drizzle

  • Sunday

    Sunday: Snow, possibly mixed with rain, becoming all snow after 4pm. Temperature rising to near 40 by 10am, then falling to around 30 during the remainder of the day. Light and variable wind becoming northwest 10 to 15 mph in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 40 °F⇓

    Rain then
    Rain/Snow

  • Sunday Night

    Sunday Night: Snow. Patchy blowing snow after 11pm. Low around 12. Wind chill values as low as -5. Blustery, with a northwest wind 16 to 21 mph, with gusts as high as 37 mph. Chance of precipitation is 90%. New snow accumulation of 4 to 6 inches possible.

    Low: 12 °F

    Snow and
    Patchy
    Blowing Snow

  • Monday

    Monday: A 50 percent chance of snow before noon. Patchy blowing snow before noon. Mostly cloudy, with a high near 19. Blustery, with a northwest wind 15 to 21 mph, with gusts as high as 37 mph. New snow accumulation of less than a half inch possible.

    High: 19 °F

    Chance Snow
    and Patchy
    Blowing Snow

  • Monday Night

    Monday Night: Partly cloudy, with a low around 3. Northwest wind 5 to 10 mph becoming light west after midnight. Winds could gust as high as 25 mph.

    Low: 3 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 26. Southwest wind 3 to 7 mph.

    High: 26 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 12. West wind around 6 mph, with gusts as high as 20 mph.

    Low: 12 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 21. Northwest wind 6 to 10 mph, with gusts as high as 20 mph.

    High: 21 °F

    Mostly Cloudy
    then Slight
    Chance Snow

Detailed Forecast

Today
Patchy drizzle after 5pm. Areas of fog before 2pm. Otherwise, cloudy, with a high near 42. Calm wind becoming south 5 to 7 mph.
Tonight
Patchy drizzle before 3am. Cloudy, with a low around 37. Light and variable wind.
Sunday
Snow, possibly mixed with rain, becoming all snow after 4pm. Temperature rising to near 40 by 10am, then falling to around 30 during the remainder of the day. Light and variable wind becoming northwest 10 to 15 mph in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Sunday Night
Snow. Patchy blowing snow after 11pm. Low around 12. Wind chill values as low as -5. Blustery, with a northwest wind 16 to 21 mph, with gusts as high as 37 mph. Chance of precipitation is 90%. New snow accumulation of 4 to 6 inches possible.
Monday
A 50 percent chance of snow before noon. Patchy blowing snow before noon. Mostly cloudy, with a high near 19. Blustery, with a northwest wind 15 to 21 mph, with gusts as high as 37 mph. New snow accumulation of less than a half inch possible.
Monday Night
Partly cloudy, with a low around 3. Northwest wind 5 to 10 mph becoming light west after midnight. Winds could gust as high as 25 mph.
Tuesday
Partly sunny, with a high near 26. Southwest wind 3 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 12. West wind around 6 mph, with gusts as high as 20 mph.
Wednesday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 21. Northwest wind 6 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around -1. Northwest wind around 6 mph, with gusts as high as 18 mph.
New Year's Day
Sunny, with a high near 10. Northwest wind 6 to 8 mph.
Thursday Night
Mostly clear, with a low around -6. West wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 15. Calm wind becoming west around 5 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.93°N 90.81°W
Last Update:
7:42 am CST Dec 27, 2025
Forecast Valid:
8am CST Dec 27, 2025-6pm CST Jan 2, 2026
 
Forecast Discussion
 
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Additional Resources

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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