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

26°F

-3°C

Humidity 77%
Wind Speed Calm
Barometer 30.19 in (1023.9 mb)
Dewpoint 20°F (-7°C)
Visibility 9.00 mi
Last update 11 Jan 3:55 am CST
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: Isolated flurries before 5am. Cloudy, with a steady temperature around 23. Northwest wind around 7 mph, with gusts as high as 26 mph.

    Low: 23 °F

    Isolated
    Flurries

  • Sunday

    Sunday: Partly sunny, with a high near 30. Northwest wind 6 to 8 mph becoming southwest in the afternoon. Winds could gust as high as 21 mph.

    High: 30 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 23. Southwest wind 5 to 7 mph, with gusts as high as 20 mph.

    Low: 23 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 42. Calm wind becoming west around 6 mph.

    High: 42 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 30. Calm wind becoming southwest around 6 mph after midnight.

    Low: 30 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of rain, mainly before noon. Partly sunny, with a high near 44. West wind 6 to 11 mph, with gusts as high as 22 mph.

    High: 44 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 21. Northwest wind around 8 mph, with gusts as high as 22 mph.

    Low: 21 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Wednesday

    Wednesday: A 20 percent chance of snow before noon. Partly sunny, with a high near 27. North wind 7 to 10 mph, with gusts as high as 21 mph.

    High: 27 °F

    Slight Chance
    Snow then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 12. North wind around 6 mph becoming calm in the evening.

    Low: 12 °F

    Partly Cloudy

Detailed Forecast

Overnight
Isolated flurries before 5am. Cloudy, with a steady temperature around 23. Northwest wind around 7 mph, with gusts as high as 26 mph.
Sunday
Partly sunny, with a high near 30. Northwest wind 6 to 8 mph becoming southwest in the afternoon. Winds could gust as high as 21 mph.
Sunday Night
Partly cloudy, with a low around 23. Southwest wind 5 to 7 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 42. Calm wind becoming west around 6 mph.
Monday Night
Mostly cloudy, with a low around 30. Calm wind becoming southwest around 6 mph after midnight.
Tuesday
A 30 percent chance of rain, mainly before noon. Partly sunny, with a high near 44. West wind 6 to 11 mph, with gusts as high as 22 mph.
Tuesday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 21. Northwest wind around 8 mph, with gusts as high as 22 mph.
Wednesday
A 20 percent chance of snow before noon. Partly sunny, with a high near 27. North wind 7 to 10 mph, with gusts as high as 21 mph.
Wednesday Night
Partly cloudy, with a low around 12. North wind around 6 mph becoming calm in the evening.
Thursday
A 40 percent chance of snow after noon. Partly sunny, with a high near 30. Calm wind becoming south 5 to 7 mph in the morning.
Thursday Night
Snow likely. Mostly cloudy, with a low around 20. West wind around 6 mph. Chance of precipitation is 60%.
Friday
Snow likely. Mostly cloudy, with a high near 30. West wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Friday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 10. Northwest wind around 7 mph, with gusts as high as 20 mph.
Saturday
Mostly cloudy, with a high near 19. West wind 6 to 9 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:
3:51 am CST Jan 11, 2026
Forecast Valid:
4am CST Jan 11, 2026-6pm CST Jan 17, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation