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

38°F

3°C

Humidity 92%
Wind Speed SE 7 mph
Barometer 29.82 in (1010.9 mb)
Dewpoint 36°F (2°C)
Visibility 9.00 mi
Wind Chill33°F (1°C)
Last update 27 Dec 11:55 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

  • This Afternoon

    This Afternoon: Patchy drizzle after 5pm. Patchy fog before 2pm. Otherwise, cloudy, with a high near 42. South wind 3 to 7 mph.

    High: 42 °F

    Patchy
    Drizzle and
    Patchy Fog

  • Tonight

    Tonight: Patchy drizzle before midnight, then a chance of rain between midnight and 4am. Cloudy, with a low around 36. Calm wind. Chance of precipitation is 30%.

    Low: 36 °F

    Chance Rain

  • Sunday

    Sunday: Snow, possibly mixed with rain, becoming all snow after 4pm. Temperature falling to around 29 by 5pm. Breezy, with a light and variable wind becoming northwest 12 to 17 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.

    High: 37 °F⇓

    Rain Likely
    then
    Rain/Snow and
    Breezy

  • Sunday Night

    Sunday Night: Snow. The snow could be heavy at times. Patchy blowing snow. Low around 11. Wind chill values as low as -7. Blustery, with a west wind 17 to 21 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.

    Low: 11 °F

    Heavy Snow
    and Patchy
    Blowing Snow

  • Monday

    Monday: A 20 percent chance of snow before noon. Patchy blowing snow before noon. Partly sunny, with a high near 18. Blustery, with a northwest wind 11 to 20 mph, with gusts as high as 39 mph.

    High: 18 °F

    Slight Chance
    Snow and
    Patchy
    Blowing Snow

  • Monday Night

    Monday Night: Partly cloudy, with a low around 2. Northwest wind 5 to 9 mph becoming light west after midnight. Winds could gust as high as 24 mph.

    Low: 2 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of snow after noon. Partly sunny, with a high near 26. Southwest wind 3 to 6 mph.

    High: 26 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 15. West wind around 6 mph, with gusts as high as 18 mph.

    Low: 15 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of snow after noon. Mostly cloudy, with a high near 23. Northwest wind 5 to 7 mph, with gusts as high as 18 mph.

    High: 23 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

This Afternoon
Patchy drizzle after 5pm. Patchy fog before 2pm. Otherwise, cloudy, with a high near 42. South wind 3 to 7 mph.
Tonight
Patchy drizzle before midnight, then a chance of rain between midnight and 4am. Cloudy, with a low around 36. Calm wind. Chance of precipitation is 30%.
Sunday
Snow, possibly mixed with rain, becoming all snow after 4pm. Temperature falling to around 29 by 5pm. Breezy, with a light and variable wind becoming northwest 12 to 17 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.
Sunday Night
Snow. The snow could be heavy at times. Patchy blowing snow. Low around 11. Wind chill values as low as -7. Blustery, with a west wind 17 to 21 mph, with gusts as high as 40 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.
Monday
A 20 percent chance of snow before noon. Patchy blowing snow before noon. Partly sunny, with a high near 18. Blustery, with a northwest wind 11 to 20 mph, with gusts as high as 39 mph.
Monday Night
Partly cloudy, with a low around 2. Northwest wind 5 to 9 mph becoming light west after midnight. Winds could gust as high as 24 mph.
Tuesday
A 20 percent chance of snow after noon. Partly sunny, with a high near 26. Southwest wind 3 to 6 mph.
Tuesday Night
Mostly cloudy, with a low around 15. West wind around 6 mph, with gusts as high as 18 mph.
Wednesday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 23. Northwest wind 5 to 7 mph, with gusts as high as 18 mph.
Wednesday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 1. Northwest wind 3 to 5 mph.
New Year's Day
Mostly sunny, with a high near 14. West wind 3 to 6 mph.
Thursday Night
Partly cloudy, with a low around -2. Light west wind.
Friday
Partly sunny, with a high near 19. 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:
12:26 pm CST Dec 27, 2025
Forecast Valid:
12pm 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