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

23°F

-5°C

Humidity 83%
Wind Speed Calm
Barometer 30.28 in (1026.7 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Last update 23 Mar 12:55 am CDT
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: Mostly clear, with a steady temperature around 27. Calm wind.

    Low: 27 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 48. Calm wind.

    High: 48 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 33. Calm wind becoming south around 5 mph after midnight.

    Low: 33 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, with a high near 56. Southwest wind 3 to 6 mph.

    High: 56 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38. Light south wind.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 64. Southwest wind 3 to 6 mph.

    High: 64 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 42. Southeast wind around 5 mph.

    Low: 42 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 61. Southeast wind 5 to 11 mph becoming northwest in the afternoon.

    High: 61 °F

    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 24. North wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 24 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a steady temperature around 27. Calm wind.
Monday
Sunny, with a high near 48. Calm wind.
Monday Night
Increasing clouds, with a low around 33. Calm wind becoming south around 5 mph after midnight.
Tuesday
Partly sunny, with a high near 56. Southwest wind 3 to 6 mph.
Tuesday Night
Mostly cloudy, with a low around 38. Light south wind.
Wednesday
Partly sunny, with a high near 64. Southwest wind 3 to 6 mph.
Wednesday Night
Mostly cloudy, with a low around 42. Southeast wind around 5 mph.
Thursday
A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 61. Southeast wind 5 to 11 mph becoming northwest in the afternoon.
Thursday Night
Partly cloudy, with a low around 24. North wind 6 to 10 mph, with gusts as high as 20 mph.
Friday
Mostly sunny, with a high near 43. Northwest wind 5 to 8 mph.
Friday Night
Mostly clear, with a low around 24. Northwest wind 3 to 6 mph.
Saturday
Mostly sunny, with a high near 52. West wind 5 to 11 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 31. Southwest wind around 7 mph.
Sunday
Sunny, with a high near 59. Southwest wind 5 to 8 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:
11:06 pm CDT Mar 22, 2026
Forecast Valid:
1am CDT Mar 23, 2026-6pm CDT Mar 29, 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