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

39°F

4°C

Humidity 68%
Wind Speed Calm
Barometer 30.09 in (1019.8 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 25 Mar 12:55 am CDT
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: Mostly cloudy, with a low around 36. Light south wind.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 70. South wind 5 to 11 mph becoming southwest in the afternoon.

    High: 70 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 46. Southwest wind around 5 mph becoming calm in the evening.

    Low: 46 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 59. Light and variable wind becoming north 6 to 11 mph in the morning. Winds could gust as high as 20 mph.

    High: 59 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 24. North wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 20 mph.

    Low: 24 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 43. Light and variable wind becoming northwest 5 to 10 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 43 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 22. Northwest wind around 6 mph becoming calm in the evening.

    Low: 22 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 52. Light southwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 52 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 34. Southwest wind around 5 mph becoming light and variable.

    Low: 34 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 36. Light south wind.
Wednesday
Mostly sunny, with a high near 70. South wind 5 to 11 mph becoming southwest in the afternoon.
Wednesday Night
Partly cloudy, with a low around 46. Southwest wind around 5 mph becoming calm in the evening.
Thursday
A 30 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 59. Light and variable wind becoming north 6 to 11 mph in the morning. Winds could gust as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 24. North wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 20 mph.
Friday
Mostly sunny, with a high near 43. Light and variable wind becoming northwest 5 to 10 mph in the afternoon. Winds could gust as high as 18 mph.
Friday Night
Mostly clear, with a low around 22. Northwest wind around 6 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 52. Light southwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 34. Southwest wind around 5 mph becoming light and variable.
Sunday
Mostly sunny, with a high near 64. South wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 43. South wind around 6 mph.
Monday
A 20 percent chance of showers. Mostly sunny, with a high near 71. Southeast wind 5 to 7 mph.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 44. East wind 6 to 8 mph.
Tuesday
A 30 percent chance of showers. Partly sunny, with a high near 67. Southeast wind 8 to 11 mph, with gusts as high as 20 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:
1:26 am CDT Mar 25, 2026
Forecast Valid:
1am CDT Mar 25, 2026-6pm CDT Mar 31, 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