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

55°F

13°C

Humidity 92%
Wind Speed Calm
Barometer 29.98 in (1015.4 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 25 May 12:55 am CDT
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: Increasing clouds, with a low around 58. Light south wind.

    Low: 58 °F

    Increasing
    Clouds

  • Memorial Day

    Memorial Day: A 40 percent chance of showers, mainly before 10am. Mostly cloudy, then gradually becoming sunny, with a high near 84. South wind 5 to 14 mph, with gusts as high as 24 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 84 °F

    Chance
    Showers then
    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 62. Southwest wind 5 to 8 mph, with gusts as high as 20 mph.

    Low: 62 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 91. Southwest wind 3 to 5 mph.

    High: 91 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 61. Calm wind.

    Low: 61 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Calm wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. Calm wind becoming east around 5 mph after midnight.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 86. Light east wind.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 56. Calm wind.

    Low: 56 °F

    Partly Cloudy

Detailed Forecast

Overnight
Increasing clouds, with a low around 58. Light south wind.
Memorial Day
A 40 percent chance of showers, mainly before 10am. Mostly cloudy, then gradually becoming sunny, with a high near 84. South wind 5 to 14 mph, with gusts as high as 24 mph. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Mostly clear, with a low around 62. Southwest wind 5 to 8 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 91. Southwest wind 3 to 5 mph.
Tuesday Night
Partly cloudy, with a low around 61. Calm wind.
Wednesday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Calm wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Mostly clear, with a low around 57. Calm wind becoming east around 5 mph after midnight.
Thursday
Sunny, with a high near 86. Light east wind.
Thursday Night
Partly cloudy, with a low around 56. Calm wind.
Friday
Mostly sunny, with a high near 86. Light east wind.
Friday Night
Partly cloudy, with a low around 55. Calm wind.
Saturday
Mostly sunny, with a high near 82. Calm wind becoming east 5 to 7 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 53. East wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 82. Calm wind becoming east around 5 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.95°N 90.81°W
Last Update:
12:56 am CDT May 25, 2026
Forecast Valid:
1am CDT May 25, 2026-6pm CDT May 31, 2026
 
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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