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

59°F

15°C

Humidity 68%
Wind Speed Calm
Barometer 30.15 in (1021.6 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 14 Oct 3:55 pm CDT
Extended Forecast for

Sparta WI

  • Tonight

    Tonight: Mostly cloudy, with a low around 42. East wind 5 to 7 mph.

    Low: 42 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers, mainly after noon. High near 53. East wind 6 to 8 mph becoming northeast in the afternoon. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 53 °F

    Chance
    Showers then
    Showers

  • Thursday Night

    Thursday Night: Showers, mainly before 1am. Low around 38. Breezy, with a northwest wind 6 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 38 °F

    Showers then
    Showers
    Likely and
    Breezy

  • Friday

    Friday: A 50 percent chance of showers before 1pm. Mostly cloudy, with a high near 54. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 32 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 54 °F

    Chance
    Showers and
    Breezy

  • Friday Night

    Friday Night: Widespread frost, mainly after 1am. Otherwise, mostly clear, with a low around 28. North wind around 6 mph becoming calm in the evening. Winds could gust as high as 18 mph.

    Low: 28 °F

    Frost

  • Saturday

    Saturday: Widespread frost before 9am. Otherwise, sunny, with a high near 60. Light south wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 23 mph.

    High: 60 °F

    Frost then
    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 35. Southwest wind around 6 mph, with gusts as high as 20 mph.

    Low: 35 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 66. Breezy, with a southwest wind 7 to 16 mph, with gusts as high as 25 mph.

    High: 66 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 40. South wind around 6 mph becoming calm in the evening. Winds could gust as high as 22 mph.

    Low: 40 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 42. East wind 5 to 7 mph.
Thursday
Showers, mainly after noon. High near 53. East wind 6 to 8 mph becoming northeast in the afternoon. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Showers, mainly before 1am. Low around 38. Breezy, with a northwest wind 6 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday
A 50 percent chance of showers before 1pm. Mostly cloudy, with a high near 54. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 32 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Widespread frost, mainly after 1am. Otherwise, mostly clear, with a low around 28. North wind around 6 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Saturday
Widespread frost before 9am. Otherwise, sunny, with a high near 60. Light south wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 23 mph.
Saturday Night
Clear, with a low around 35. Southwest wind around 6 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 66. Breezy, with a southwest wind 7 to 16 mph, with gusts as high as 25 mph.
Sunday Night
Partly cloudy, with a low around 40. South wind around 6 mph becoming calm in the evening. Winds could gust as high as 22 mph.
Monday
Mostly sunny, with a high near 68. Calm wind.
Monday Night
Mostly clear, with a low around 39. Calm wind.
Tuesday
Sunny, with a high near 70. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 46. Calm wind.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 72. Calm wind becoming south 5 to 8 mph in the morning. Winds could gust as high as 20 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.95°N 90.81°W
Last Update:
1:26 pm CDT Oct 14, 2026
Forecast Valid:
4pm CDT Oct 14, 2026-6pm CDT Oct 21, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation