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.

Fog/Mist

44°F

7°C

Humidity 98%
Wind Speed Calm
Barometer 30.41 in (1030.3 mb)
Dewpoint 44°F (7°C)
Visibility 1.25 mi
Last update 23 Sep 5:55 am CDT
Extended Forecast for

5 Miles WNW Ontario WI

  • Today

    Today: Areas of fog before 9am. Otherwise, mostly sunny, with a high near 64. East wind 5 to 7 mph.

    High: 64 °F

    Areas Fog
    then Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 47. Light east wind.

    Low: 47 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Partly sunny, with a high near 66. Calm wind becoming southeast around 5 mph in the morning.

    High: 66 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 51. Calm wind.

    Low: 51 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 68. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 68 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 49. Light southeast wind.

    Low: 49 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of showers. Mostly cloudy, with a high near 63. Southeast wind 5 to 9 mph.

    High: 63 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 50. Southeast wind 5 to 7 mph becoming calm after midnight.

    Low: 50 °F

    Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 67. Light south wind.

    High: 67 °F

    Slight Chance
    Showers

Detailed Forecast

Today
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 64. East wind 5 to 7 mph.
Tonight
Increasing clouds, with a low around 47. Light east wind.
Thursday
Partly sunny, with a high near 66. Calm wind becoming southeast around 5 mph in the morning.
Thursday Night
Mostly cloudy, with a low around 51. Calm wind.
Friday
Mostly cloudy, with a high near 68. Calm wind becoming southeast around 5 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 49. Light southeast wind.
Saturday
A 30 percent chance of showers. Mostly cloudy, with a high near 63. Southeast wind 5 to 9 mph.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 50. Southeast wind 5 to 7 mph becoming calm after midnight.
Sunday
A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 67. Light south wind.
Sunday Night
Partly cloudy, with a low around 52. Calm wind.
Monday
Partly sunny, with a high near 72. Calm wind becoming south around 6 mph in the afternoon.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 56. South wind 3 to 5 mph.
Tuesday
Showers likely. Partly sunny, with a high near 69. South wind 6 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WNW Ontario WI
 43.75°N 90.67°W
Last Update:
6:46 am CDT Sep 23, 2026
Forecast Valid:
8am CDT Sep 23, 2026-6pm CDT Sep 29, 2026
 
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Additional Resources

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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