National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Black River Falls Area Airport (KBCK)

Lat: 44.25°NLon: 90.85°WElev: 830ft.

Fog/Mist

67°F

19°C

Humidity 100%
Wind Speed Calm
Barometer 29.92 in
Dewpoint 67°F (19°C)
Visibility 4.00 mi
Last update 1 Sep 11:15 pm CDT
Extended Forecast for

Merrillan WI

  • Tonight

    Tonight: Showers and thunderstorms, mainly after 2am. Low around 65. Calm wind. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 65 °F

    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms likely before 8am, then a slight chance of showers between 8am and 10am. Mostly cloudy, then gradually becoming sunny, with a high near 85. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    T-storms
    Likely then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 10 percent chance of showers and thunderstorms after 5am. Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly before 4pm. Mostly cloudy, with a high near 85. Calm wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    Showers
    Likely then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Light southeast wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Partly sunny, with a high near 87. South wind 3 to 5 mph. Chance of precipitation is 30%.

    High: 87 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 86. Light southeast wind.

    High: 86 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. Light southeast wind.

    Low: 64 °F

    Partly Cloudy
    then Chance
    T-storms

Detailed Forecast

Tonight
Showers and thunderstorms, mainly after 2am. Low around 65. Calm wind. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Showers and thunderstorms likely before 8am, then a slight chance of showers between 8am and 10am. Mostly cloudy, then gradually becoming sunny, with a high near 85. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A 10 percent chance of showers and thunderstorms after 5am. Mostly clear, with a low around 64. Calm wind.
Thursday
Showers and thunderstorms likely, mainly before 4pm. Mostly cloudy, with a high near 85. Calm wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Light southeast wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday
A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Partly sunny, with a high near 87. South wind 3 to 5 mph. Chance of precipitation is 30%.
Friday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 66. Calm wind.
Saturday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 86. Light southeast wind.
Saturday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64. Light southeast wind.
Sunday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 84. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Calm wind.
Labor Day
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 80. Calm wind becoming southeast 5 to 7 mph in the morning.
Monday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 58. East wind around 6 mph.
Tuesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 79. Southeast wind 7 to 9 mph, with gusts as high as 21 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Merrillan WI
 44.45°N 90.85°W
Last Update:
11:06 pm CDT Sep 1, 2026
Forecast Valid:
11pm CDT Sep 1, 2026-6pm CDT Sep 8, 2026
 
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Additional Resources

Radar & Satellite Image

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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