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

63°F

17°C

Humidity 36%
Wind Speed E 10 mph
Barometer 30.06 in (1018.4 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 22 May 2:55 pm CDT
Extended Forecast for

2 Miles NNW Tomah WI

  • Tonight

    Tonight: Mostly cloudy, with a low around 49. East wind 10 to 15 mph, with gusts as high as 28 mph.

    Low: 49 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 74. Southeast wind 6 to 9 mph, with gusts as high as 18 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 74 °F

    Partly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly before midnight. Mostly cloudy, with a low around 49. Southeast wind around 6 mph becoming west after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 49 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 79. West wind 5 to 7 mph.

    High: 79 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 52. Calm wind. Chance of precipitation is 20%.

    Low: 52 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Memorial Day

    Memorial Day: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. Southwest wind 3 to 8 mph.

    High: 84 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: Sunny, with a high near 88. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 88 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 49. East wind 10 to 15 mph, with gusts as high as 28 mph.
Saturday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 74. Southeast wind 6 to 9 mph, with gusts as high as 18 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers likely, mainly before midnight. Mostly cloudy, with a low around 49. Southeast wind around 6 mph becoming west after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Mostly sunny, with a high near 79. West wind 5 to 7 mph.
Sunday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 52. Calm wind. Chance of precipitation is 20%.
Memorial Day
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. Southwest wind 3 to 8 mph.
Monday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 58. Calm wind.
Tuesday
Sunny, with a high near 88. Calm wind becoming southwest around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 59. Calm wind.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. Calm wind becoming east 5 to 8 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 57. East wind 3 to 6 mph.
Thursday
Mostly sunny, with a high near 83. East wind 3 to 8 mph.
Thursday Night
Mostly clear, with a low around 56. East wind around 5 mph becoming calm in the evening.
Friday
A 20 percent chance of showers. Sunny, with a high near 84. Calm wind becoming east 5 to 7 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Tomah WI
 44.01°N 90.51°W
Last Update:
1:26 pm CDT May 22, 2026
Forecast Valid:
3pm CDT May 22, 2026-6pm CDT May 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