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.

Fair

44°F

7°C

Humidity 87%
Wind Speed Calm
Barometer 29.77 in (1008.7 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 20 Mar 2:55 am CDT
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: Mostly cloudy, with a low around 38. Light and variable wind becoming southwest around 5 mph.

    Low: 38 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 61. Northwest wind 5 to 7 mph.

    High: 61 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 38. Calm wind.

    Low: 38 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 73. Light south wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 21 mph.

    High: 73 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 43. Calm wind becoming north around 6 mph after midnight.

    Low: 43 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Sunday

    Sunday: A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 50. Northeast wind 6 to 11 mph.

    High: 50 °F

    Slight Chance
    Rain

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 25. North wind around 6 mph becoming calm in the evening.

    Low: 25 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 49. Light and variable wind.

    High: 49 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 33. Calm wind becoming south around 6 mph after midnight.

    Low: 33 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 38. Light and variable wind becoming southwest around 5 mph.
Friday
Partly sunny, with a high near 61. Northwest wind 5 to 7 mph.
Friday Night
Mostly cloudy, with a low around 38. Calm wind.
Saturday
Mostly sunny, with a high near 73. Light south wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 21 mph.
Saturday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 43. Calm wind becoming north around 6 mph after midnight.
Sunday
A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 50. Northeast wind 6 to 11 mph.
Sunday Night
Partly cloudy, with a low around 25. North wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 49. Light and variable wind.
Monday Night
Mostly cloudy, with a low around 33. Calm wind becoming south around 6 mph after midnight.
Tuesday
Partly sunny, with a high near 55. South wind 5 to 7 mph becoming west in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 31. Light and variable wind becoming northeast around 5 mph after midnight.
Wednesday
A slight chance of rain and snow. Partly sunny, with a high near 52. South wind 5 to 9 mph. Chance of precipitation is 20%.
Wednesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 37. South wind around 7 mph.
Thursday
A 30 percent chance of rain. Partly sunny, with a high near 54. Northwest wind 7 to 14 mph, with gusts as high as 22 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:
2:21 am CDT Mar 20, 2026
Forecast Valid:
3am CDT Mar 20, 2026-6pm CDT Mar 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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