Dangerously Hot This Weekend - Be Ready!

Heat Advisories and Warnings are in effect this weekend with widespread hot and humid conditions. This heat will be dangerous - children, pets and the elderly are especially susceptible to the heat - check on them!!  Read More >

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Partly Cloudy

87°F

31°C

Humidity 52%
Wind Speed Calm
Barometer 29.72 in (1006.2 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 20 Jun 6:55 pm CDT
Extended Forecast for

Sparta WI

Heat Advisory June 21, 12:00pm until June 22, 09:00pm
Click here for hazard details and duration
Heat Advisory
  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 8pm and 10pm.  Partly cloudy, with a low around 75. South wind 6 to 10 mph, with gusts as high as 24 mph.  Chance of precipitation is 20%.

    Low: 75 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 96. Heat index values as high as 106. Breezy, with a southwest wind 11 to 18 mph, with gusts as high as 28 mph.

    High: 96 °F

    Hot and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 78. Southwest wind 10 to 13 mph, with gusts as high as 25 mph.

    Low: 78 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 97. Heat index values as high as 106. Breezy, with a south wind 10 to 17 mph, with gusts as high as 26 mph.

    High: 97 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 1am.  Mostly clear, with a low around 76. South wind 9 to 13 mph, with gusts as high as 24 mph.

    Low: 76 °F

    Clear then
    Slight Chance
    T-storms

  • Monday

    Monday: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm.  Mostly sunny, with a high near 90. Southwest wind 9 to 11 mph, with gusts as high as 21 mph.  Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 90 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm.  Mostly cloudy, with a low around 63. West wind around 6 mph becoming calm  in the evening.  Chance of precipitation is 70%.

    Low: 63 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm.  Mostly cloudy, with a high near 78. Calm wind becoming east around 5 mph in the afternoon.  Chance of precipitation is 70%.

    High: 78 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm.  Low around 61. Light east wind.  Chance of precipitation is 90%.

    Low: 61 °F

    Showers
    Likely then
    Showers

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms between 8pm and 10pm. Partly cloudy, with a low around 75. South wind 6 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Saturday
Mostly sunny and hot, with a high near 96. Heat index values as high as 106. Breezy, with a southwest wind 11 to 18 mph, with gusts as high as 28 mph.
Saturday Night
Mostly clear, with a low around 78. Southwest wind 10 to 13 mph, with gusts as high as 25 mph.
Sunday
Sunny and hot, with a high near 97. Heat index values as high as 106. Breezy, with a south wind 10 to 17 mph, with gusts as high as 26 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 76. South wind 9 to 13 mph, with gusts as high as 24 mph.
Monday
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 90. Southwest wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 63. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 70%.
Tuesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 78. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 70%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 61. Light east wind. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm. High near 81. Light and variable wind becoming south 5 to 7 mph in the morning. Chance of precipitation is 80%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 64. North wind around 6 mph becoming calm in the evening. Chance of precipitation is 80%.
Thursday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 80. South wind 3 to 8 mph. Chance of precipitation is 70%.
Thursday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 62. Southeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%.
Friday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Southwest wind 3 to 6 mph.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.95°N 90.81°W
5:28 pm CDT Jun 20, 2025
7pm CDT Jun 20, 2025-6pm CDT Jun 27, 2025
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database