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

22°F

-6°C

Humidity 88%
Wind Speed Calm
Barometer 30.27 in (1026.3 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Last update 20 Apr 1:55 am CDT
Extended Forecast for

Sparta WI

  • Overnight

    Overnight: Widespread frost after 3am. Otherwise, clear, with a low around 24. Calm wind.

    Low: 24 °F

    Frost

  • Monday

    Monday: Widespread frost before 7am. Otherwise, sunny, with a high near 57. Calm wind becoming south 5 to 9 mph in the afternoon.

    High: 57 °F

    Frost then
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 43. South wind 3 to 8 mph. Winds could gust as high as 18 mph.

    Low: 43 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 74. Calm wind.

    High: 74 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 41. Calm wind.

    Low: 41 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 76. Calm wind becoming southeast 5 to 8 mph in the morning.

    High: 76 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 59. South wind around 6 mph.

    Low: 59 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 77. Breezy, with a south wind 7 to 12 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 77 °F

    Partly Sunny
    then Chance
    Showers and
    Breezy

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 52. South wind 9 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    Low: 52 °F

    Showers

Detailed Forecast

Overnight
Widespread frost after 3am. Otherwise, clear, with a low around 24. Calm wind.
Monday
Widespread frost before 7am. Otherwise, sunny, with a high near 57. Calm wind becoming south 5 to 9 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 43. South wind 3 to 8 mph. Winds could gust as high as 18 mph.
Tuesday
Sunny, with a high near 74. Calm wind.
Tuesday Night
Clear, with a low around 41. Calm wind.
Wednesday
Sunny, with a high near 76. Calm wind becoming southeast 5 to 8 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 59. South wind around 6 mph.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 77. Breezy, with a south wind 7 to 12 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph.
Thursday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 52. South wind 9 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Friday
A 20 percent chance of showers. Partly sunny, with a high near 64. West wind 8 to 13 mph.
Friday Night
Partly cloudy, with a low around 39. Northwest wind 5 to 8 mph.
Saturday
Mostly sunny, with a high near 61. Northwest wind 5 to 9 mph.
Saturday Night
Mostly cloudy, with a low around 38. Northwest wind 3 to 6 mph.
Sunday
A 20 percent chance of showers. Mostly sunny, with a high near 62. West wind 3 to 7 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.93°N 90.81°W
Last Update:
2:26 am CDT Apr 20, 2026
Forecast Valid:
2am CDT Apr 20, 2026-6pm CDT Apr 26, 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