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

-30°F

-34°C

Humidity 69%
Wind Speed Calm
Barometer 30.70 in (1044.2 mb)
Dewpoint -36°F (-38°C)
Visibility 10.00 mi
Last update 24 Jan 6:55 am CST
Extended Forecast for

Sparta WI

  • Today

    Today: Mostly sunny and cold, with a high near 1. Wind chill values as low as -18. Calm wind.

    High: 1 °F

    Cold

  • Tonight

    Tonight: Mostly cloudy, with a low around -12. Calm wind.

    Low: -12 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 7. Wind chill values as low as -11. Calm wind becoming north around 5 mph.

    High: 7 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around -12. Light northwest wind.

    Low: -12 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 11. West wind 3 to 7 mph.

    High: 11 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 2. Southwest wind around 7 mph becoming west after midnight. Winds could gust as high as 18 mph.

    Low: 2 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 13. Northwest wind 7 to 10 mph, with gusts as high as 21 mph.

    High: 13 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around -3. Northwest wind around 6 mph becoming calm in the evening.

    Low: -3 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of snow. Partly sunny, with a high near 12. Calm wind becoming northwest 5 to 7 mph in the morning.

    High: 12 °F

    Slight Chance
    Snow

Detailed Forecast

Today
Mostly sunny and cold, with a high near 1. Wind chill values as low as -18. Calm wind.
Tonight
Mostly cloudy, with a low around -12. Calm wind.
Sunday
Mostly sunny, with a high near 7. Wind chill values as low as -11. Calm wind becoming north around 5 mph.
Sunday Night
Mostly clear, with a low around -12. Light northwest wind.
Monday
Mostly sunny, with a high near 11. West wind 3 to 7 mph.
Monday Night
Mostly cloudy, with a low around 2. Southwest wind around 7 mph becoming west after midnight. Winds could gust as high as 18 mph.
Tuesday
Partly sunny, with a high near 13. Northwest wind 7 to 10 mph, with gusts as high as 21 mph.
Tuesday Night
Mostly cloudy, with a low around -3. Northwest wind around 6 mph becoming calm in the evening.
Wednesday
A 20 percent chance of snow. Partly sunny, with a high near 12. Calm wind becoming northwest 5 to 7 mph in the morning.
Wednesday Night
Partly cloudy, with a low around -5. Northwest wind 3 to 5 mph.
Thursday
Mostly sunny, with a high near 14. Northwest wind 3 to 6 mph.
Thursday Night
Partly cloudy, with a low around -3. Light northwest wind.
Friday
Mostly sunny, with a high near 17. Light northwest wind.
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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:
6:46 am CST Jan 24, 2026
Forecast Valid:
7am CST Jan 24, 2026-6pm CST Jan 30, 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