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

80°F

27°C

Humidity 49%
Wind Speed Calm
Barometer 30.04 in (1017.4 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 6 Aug 3:55 pm CDT
Extended Forecast for

4 Miles E Westby WI

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, increasing clouds, with a low around 61. South wind 3 to 5 mph.

    Low: 61 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Areas of fog before 9am. Otherwise, partly sunny, with a high near 84. Southwest wind 6 to 11 mph, with gusts as high as 21 mph.

    High: 84 °F

    Areas Fog
    then Partly
    Sunny

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 58. Southwest wind 5 to 8 mph becoming light and variable. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 58 °F

    Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, then gradually becoming sunny, with a high near 82. Calm wind becoming west around 5 mph in the afternoon.

    High: 82 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 62. Light south wind. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 85. Calm wind becoming south around 5 mph in the afternoon.

    High: 85 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 64. Light south wind.

    Low: 64 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Monday

    Monday: Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 83. Light and variable wind becoming southwest around 6 mph in the morning. Chance of precipitation is 60%.

    High: 83 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 63. Light and variable wind.

    Low: 63 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

Detailed Forecast

Tonight
Patchy fog after 3am. Otherwise, increasing clouds, with a low around 61. South wind 3 to 5 mph.
Friday
Areas of fog before 9am. Otherwise, partly sunny, with a high near 84. Southwest wind 6 to 11 mph, with gusts as high as 21 mph.
Friday Night
A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 58. Southwest wind 5 to 8 mph becoming light and variable. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 82. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 62. Light south wind. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Mostly sunny, with a high near 85. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 64. Light south wind.
Monday
Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 83. Light and variable wind becoming southwest around 6 mph in the morning. Chance of precipitation is 60%.
Monday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 63. Light and variable wind.
Tuesday
A 30 percent chance of showers before 1pm. Partly sunny, with a high near 82. Calm wind.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61. Calm wind.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 81. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 58. Light northwest wind.
Thursday
Mostly sunny, with a high near 79. Calm wind becoming northwest around 5 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Westby WI
 43.65°N 90.77°W
Last Update:
4:11 pm CDT Aug 6, 2026
Forecast Valid:
4pm CDT Aug 6, 2026-6pm CDT Aug 13, 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