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

64°F

18°C

Humidity 64%
Wind Speed W 3 mph
Barometer 29.90 in (1012.5 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 13 Oct 12:55 pm CDT
Extended Forecast for

2 Miles ESE Ontario WI

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 69. Northwest wind 7 to 9 mph.

    High: 69 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers before 9pm. Mostly cloudy, with a low around 46. North wind around 7 mph.

    Low: 46 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 66. Northeast wind 6 to 9 mph.

    High: 66 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 44. East wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 44 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers, mainly after 1pm. High near 60. East wind 7 to 10 mph becoming north in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 60 °F

    Chance
    Showers then
    Showers

  • Thursday Night

    Thursday Night: A 50 percent chance of showers before 1am. Mostly cloudy, with a low around 39. Breezy, with a northwest wind 8 to 13 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 31 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 39 °F

    Chance
    Showers and
    Breezy

  • Friday

    Friday: Mostly sunny, with a high near 55. Breezy, with a north wind 17 to 21 mph, with gusts as high as 34 mph.

    High: 55 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Widespread frost, mainly after 3am. Otherwise, clear, with a low around 30. Northwest wind around 5 mph becoming calm in the evening.

    Low: 30 °F

    Mostly Clear
    then Frost

  • Saturday

    Saturday: Widespread frost before 9am. Otherwise, sunny, with a high near 60. Light southwest wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 23 mph.

    High: 60 °F

    Frost then
    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 69. Northwest wind 7 to 9 mph.
Tonight
A 20 percent chance of showers before 9pm. Mostly cloudy, with a low around 46. North wind around 7 mph.
Wednesday
Partly sunny, with a high near 66. Northeast wind 6 to 9 mph.
Wednesday Night
Mostly cloudy, with a low around 44. East wind 6 to 10 mph, with gusts as high as 18 mph.
Thursday
Showers, mainly after 1pm. High near 60. East wind 7 to 10 mph becoming north in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
A 50 percent chance of showers before 1am. Mostly cloudy, with a low around 39. Breezy, with a northwest wind 8 to 13 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 31 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday
Mostly sunny, with a high near 55. Breezy, with a north wind 17 to 21 mph, with gusts as high as 34 mph.
Friday Night
Widespread frost, mainly after 3am. Otherwise, clear, with a low around 30. Northwest wind around 5 mph becoming calm in the evening.
Saturday
Widespread frost before 9am. Otherwise, sunny, with a high near 60. Light southwest wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 23 mph.
Saturday Night
Clear, with a low around 37. Southwest wind around 9 mph, with gusts as high as 25 mph.
Sunday
Sunny, with a high near 65. Breezy, with a southwest wind 10 to 16 mph, with gusts as high as 26 mph.
Sunday Night
Mostly cloudy, with a low around 43. South wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 23 mph.
Monday
Mostly sunny, with a high near 67. Calm wind.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ESE Ontario WI
 43.71°N 90.56°W
Last Update:
1:01 pm CDT Oct 13, 2026
Forecast Valid:
1pm CDT Oct 13, 2026-6pm CDT Oct 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation