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.

Light Rain Fog/Mist

37°F

3°C

Humidity 95%
Wind Speed Calm
Barometer 29.59 in (1003.1 mb)
Dewpoint 36°F (2°C)
Visibility 4.00 mi
Last update 2 Apr 7:55 pm CDT
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Mostly cloudy, with a low around 32. Calm wind becoming west around 6 mph after midnight.

    Low: 32 °F

    Mostly Cloudy

  • Friday

    Friday: Showers likely and possibly a thunderstorm, mainly after 4pm. Mostly cloudy, with a high near 48. Calm wind becoming east around 6 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 48 °F

    Mostly Cloudy
    then Showers
    Likely

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 2am, then showers likely. Low around 34. East wind 8 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 34 °F

    Showers

  • Saturday

    Saturday: A 40 percent chance of showers, mainly after 7am. Mostly cloudy, with a high near 45. Breezy, with a west wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 25 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 45 °F

    Chance
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 29. West wind 10 to 14 mph, with gusts as high as 25 mph.

    Low: 29 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 50. West wind 8 to 10 mph, with gusts as high as 20 mph.

    High: 50 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 31. West wind around 6 mph.

    Low: 31 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 44. Breezy, with a northwest wind 7 to 16 mph, with gusts as high as 24 mph.

    High: 44 °F

    Partly Sunny
    then Mostly
    Sunny and
    Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 20. Northwest wind 6 to 11 mph becoming light north after midnight. Winds could gust as high as 23 mph.

    Low: 20 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 32. Calm wind becoming west around 6 mph after midnight.
Friday
Showers likely and possibly a thunderstorm, mainly after 4pm. Mostly cloudy, with a high near 48. Calm wind becoming east around 6 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 34. East wind 8 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A 40 percent chance of showers, mainly after 7am. Mostly cloudy, with a high near 45. Breezy, with a west wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 25 mph. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Mostly cloudy, with a low around 29. West wind 10 to 14 mph, with gusts as high as 25 mph.
Sunday
Mostly sunny, with a high near 50. West wind 8 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 31. West wind around 6 mph.
Monday
Partly sunny, with a high near 44. Breezy, with a northwest wind 7 to 16 mph, with gusts as high as 24 mph.
Monday Night
Mostly clear, with a low around 20. Northwest wind 6 to 11 mph becoming light north after midnight. Winds could gust as high as 23 mph.
Tuesday
Sunny, with a high near 48. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 32. South wind 5 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 40%.
Wednesday
A 40 percent chance of showers. Partly sunny, with a high near 65. Breezy, with a south wind 10 to 17 mph, with gusts as high as 28 mph.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 43. West wind 7 to 10 mph, with gusts as high as 23 mph.
Thursday
A 50 percent chance of showers. Mostly cloudy, with a high near 58. West wind 6 to 10 mph becoming north in the afternoon. Winds could gust as high as 18 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.93°N 90.81°W
Last Update:
10:31 pm CDT Apr 2, 2026
Forecast Valid:
10pm CDT Apr 2, 2026-6pm CDT Apr 9, 2026
 
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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