Lala Impacting Hawaii; Severe Thunderstorm and Flash Flooding Risks; Excessive Heat

Areas of gusty winds, heavy rain leading to flash flooding, and high surf continue across portions of Hawaii as Tropical Storm Lala continues to move away from the islands. Severe thunderstorm, heavy rainfall, and flash flooding threats continue from the Midwest to the Mid-Atlantic and across the central High Plains. Record heat continues for areas of the central/southern Plain into the Southeast Read More >

Current conditions at

Sparta, Sparta / Fort McCoy Airport (KCMY)

Lat: 43.96°NLon: 90.74°WElev: 837ft.

Partly Cloudy

53°F

12°C

Humidity 98%
Wind Speed Calm
Barometer 30.04 in (1017.4 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 17 Aug 3:55 am CDT
Extended Forecast for

Sparta WI

  • Today

    Today: Patchy fog before 8am.  Otherwise, sunny, with a high near 82. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 82 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am.  Partly cloudy, with a low around 62. Light southwest wind.  Chance of precipitation is 20%.

    Low: 62 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A slight chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm.  Partly sunny, with a high near 81. Calm wind becoming west around 5 mph in the morning.  Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of thunderstorms before 7pm.  Partly cloudy, with a low around 55. Calm wind.  Chance of precipitation is 30%.

    Low: 55 °F

    Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 79. Calm wind.

    High: 79 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 52. Calm wind.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 81. Calm wind.

    High: 81 °F

    Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers.  Mostly clear, with a low around 56. Calm wind.

    Low: 56 °F

    Slight Chance
    Showers

  • Friday

    Friday: A 40 percent chance of showers, mainly after 1pm.  Mostly sunny, with a high near 82. Calm wind becoming southwest 5 to 8 mph in the morning.

    High: 82 °F

    Chance
    Showers

Detailed Forecast

Today
Patchy fog before 8am. Otherwise, sunny, with a high near 82. Calm wind becoming northwest around 6 mph in the afternoon.
Tonight
A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 62. Light southwest wind. Chance of precipitation is 20%.
Tuesday
A slight chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. Calm wind becoming west around 5 mph in the morning. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A chance of thunderstorms before 7pm. Partly cloudy, with a low around 55. Calm wind. Chance of precipitation is 30%.
Wednesday
Sunny, with a high near 79. Calm wind.
Wednesday Night
Mostly clear, with a low around 52. Calm wind.
Thursday
Sunny, with a high near 81. Calm wind.
Thursday Night
A 20 percent chance of showers. Mostly clear, with a low around 56. Calm wind.
Friday
A 40 percent chance of showers, mainly after 1pm. Mostly sunny, with a high near 82. Calm wind becoming southwest 5 to 8 mph in the morning.
Friday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 58. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.
Saturday
Mostly sunny, with a high near 80. Calm wind becoming northwest 5 to 8 mph in the morning.
Saturday Night
Mostly clear, with a low around 54. Calm wind.
Sunday
Mostly sunny, with a high near 80. Calm wind.
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta WI
 43.95°N 90.81°W
3:11 am CDT Aug 17, 2026
4am CDT Aug 17, 2026-6pm CDT Aug 23, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database