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

31°F

-1°C

Humidity 83%
Wind Speed Calm
Barometer 29.71 in (1007.4 mb)
Dewpoint 27°F (-3°C)
Visibility 8.00 mi
Last update 5 Jan 2:55 am CST
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: Partly cloudy early, then becoming cloudy, with a steady temperature around 28. Light southwest wind.

    Low: 28 °F

    Becoming
    Cloudy

  • Monday

    Monday: Patchy fog between 8am and 9am. Otherwise, mostly cloudy, with a high near 37. Calm wind.

    High: 37 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Monday Night

    Monday Night: A slight chance of freezing rain before 9pm, then a slight chance of rain between 9pm and 11pm, then a chance of freezing rain after 11pm. Patchy fog after 2am. Otherwise, cloudy, with a steady temperature around 32. Calm wind. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 32 °F

    Chance
    Rain/Freezing
    Rain and
    Patchy Fog

  • Tuesday

    Tuesday: A chance of freezing rain before 8am, then a chance of rain between 8am and noon. Mostly cloudy, with a high near 38. Calm wind becoming northwest around 5 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    High: 38 °F

    Chance
    Rain/Freezing
    Rain then
    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 23. Calm wind.

    Low: 23 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 43. Light south wind.

    High: 43 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 28. Calm wind.

    Low: 28 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 42. Light and variable wind.

    High: 42 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A chance of rain and snow after midnight. Mostly cloudy, with a low around 28. Calm wind. Chance of precipitation is 30%.

    Low: 28 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

Detailed Forecast

Overnight
Partly cloudy early, then becoming cloudy, with a steady temperature around 28. Light southwest wind.
Monday
Patchy fog between 8am and 9am. Otherwise, mostly cloudy, with a high near 37. Calm wind.
Monday Night
A slight chance of freezing rain before 9pm, then a slight chance of rain between 9pm and 11pm, then a chance of freezing rain after 11pm. Patchy fog after 2am. Otherwise, cloudy, with a steady temperature around 32. Calm wind. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
A chance of freezing rain before 8am, then a chance of rain between 8am and noon. Mostly cloudy, with a high near 38. Calm wind becoming northwest around 5 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Mostly cloudy, with a low around 23. Calm wind.
Wednesday
Mostly sunny, with a high near 43. Light south wind.
Wednesday Night
Mostly clear, with a low around 28. Calm wind.
Thursday
Partly sunny, with a high near 42. Light and variable wind.
Thursday Night
A chance of rain and snow after midnight. Mostly cloudy, with a low around 28. Calm wind. Chance of precipitation is 30%.
Friday
A chance of rain and snow. Mostly cloudy, with a high near 37. Calm wind becoming northeast around 6 mph in the morning. Chance of precipitation is 50%.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 24. North wind around 6 mph becoming northwest after midnight. Chance of precipitation is 50%.
Saturday
A 40 percent chance of snow. Mostly cloudy, with a high near 30. Northwest wind 6 to 11 mph, with gusts as high as 21 mph.
Saturday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 13. West wind 5 to 8 mph, with gusts as high as 21 mph.
Sunday
Mostly sunny, with a high near 27. West wind around 6 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:
3:16 am CST Jan 5, 2026
Forecast Valid:
3am CST Jan 5, 2026-6pm CST Jan 11, 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