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.

Overcast

18°F

-8°C

Humidity 59%
Wind Speed N 16 G 25 mph
Barometer 30.01 in (1017.7 mb)
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Wind Chill3°F (-16°C)
Last update 14 Jan 8:55 am CST
Extended Forecast for

Sparta WI

  • Today

    Today: Mostly sunny, with a high near 21. Blustery, with a north wind 10 to 16 mph, with gusts as high as 29 mph.

    High: 21 °F

    Partly Sunny
    and Blustery
    then Mostly
    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 7. Northwest wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 23 mph.

    Low: 7 °F

    Mostly Cloudy

  • Thursday

    Thursday: Snow showers after noon. High near 24. Calm wind becoming south 5 to 7 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 24 °F

    Partly Sunny
    then Snow
    Showers

  • Thursday Night

    Thursday Night: Snow showers likely. Cloudy, with a low around 23. South wind around 6 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    Low: 23 °F

    Snow Showers
    Likely

  • Friday

    Friday: Snow showers before noon, then snow after noon. High near 33. West wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 33 °F

    Snow Showers

  • Friday Night

    Friday Night: A 30 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 7. Northwest wind 7 to 10 mph, with gusts as high as 23 mph.

    Low: 7 °F

    Chance Snow

  • Saturday

    Saturday: A 20 percent chance of snow before noon. Mostly cloudy, with a high near 13. Northwest wind 7 to 10 mph, with gusts as high as 20 mph.

    High: 13 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around -2. Northwest wind 3 to 6 mph.

    Low: -2 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 30 percent chance of snow, mainly after noon. Partly sunny, with a high near 13. Southwest wind 3 to 8 mph.

    High: 13 °F

    Chance Snow

Detailed Forecast

Today
Mostly sunny, with a high near 21. Blustery, with a north wind 10 to 16 mph, with gusts as high as 29 mph.
Tonight
Mostly cloudy, with a low around 7. Northwest wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 23 mph.
Thursday
Snow showers after noon. High near 24. Calm wind becoming south 5 to 7 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Thursday Night
Snow showers likely. Cloudy, with a low around 23. South wind around 6 mph becoming west after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Friday
Snow showers before noon, then snow after noon. High near 33. West wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Friday Night
A 30 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 7. Northwest wind 7 to 10 mph, with gusts as high as 23 mph.
Saturday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near 13. Northwest wind 7 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around -2. Northwest wind 3 to 6 mph.
Sunday
A 30 percent chance of snow, mainly after noon. Partly sunny, with a high near 13. Southwest wind 3 to 8 mph.
Sunday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 2. Northwest wind around 7 mph, with gusts as high as 18 mph.
M.L.King Day
Partly sunny, with a high near 12. Northwest wind 7 to 11 mph, with gusts as high as 21 mph.
Monday Night
Partly cloudy, with a low around -3. Northwest wind around 6 mph becoming calm in the evening.
Tuesday
Partly sunny, with a high near 12. Calm wind becoming west around 6 mph in the morning.
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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:
8:47 am CST Jan 14, 2026
Forecast Valid:
9am CST Jan 14, 2026-6pm CST Jan 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

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Chance of Precipitation