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

21°F

-6°C

Humidity 49%
Wind Speed Calm
Barometer 30.38 in (1030.5 mb)
Dewpoint 5°F (-15°C)
Visibility 10.00 mi
Last update 28 Feb 11:55 pm CST
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: Partly cloudy, with a low around 8. Calm wind.

    Low: 8 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 31. Calm wind.

    High: 31 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 16. Calm wind.

    Low: 16 °F

    Mostly Clear

  • Monday

    Monday: Increasing clouds, with a high near 41. Calm wind becoming south around 6 mph.

    High: 41 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 30. Calm wind. New precipitation amounts of less than a tenth of an inch possible.

    Low: 30 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tuesday

    Tuesday: A 30 percent chance of rain before noon. Mostly cloudy, with a high near 44. Calm wind.

    High: 44 °F

    Chance Rain
    then Mostly
    Cloudy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 26. Calm wind.

    Low: 26 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of rain. Mostly sunny, with a high near 46. Light east wind.

    High: 46 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain. Partly cloudy, with a low around 33. Calm wind.

    Low: 33 °F

    Slight Chance
    Rain

Detailed Forecast

Overnight
Partly cloudy, with a low around 8. Calm wind.
Sunday
Sunny, with a high near 31. Calm wind.
Sunday Night
Mostly clear, with a low around 16. Calm wind.
Monday
Increasing clouds, with a high near 41. Calm wind becoming south around 6 mph.
Monday Night
A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 30. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
A 30 percent chance of rain before noon. Mostly cloudy, with a high near 44. Calm wind.
Tuesday Night
Partly cloudy, with a low around 26. Calm wind.
Wednesday
A 30 percent chance of rain. Mostly sunny, with a high near 46. Light east wind.
Wednesday Night
A 20 percent chance of rain. Partly cloudy, with a low around 33. Calm wind.
Thursday
A 30 percent chance of rain, mainly after noon. Partly sunny, with a high near 52. Light east wind.
Thursday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 37. Light southeast wind.
Friday
Rain likely. Mostly cloudy, with a high near 55. Light and variable wind becoming southwest 5 to 7 mph in the morning. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 32. Southwest wind around 5 mph.
Saturday
A 30 percent chance of rain. Partly sunny, with a high near 53. West wind 5 to 7 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.93°N 90.81°W
Last Update:
10:51 pm CST Feb 28, 2026
Forecast Valid:
12am CST Mar 1, 2026-6pm CST Mar 7, 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