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

Black River Falls Area Airport (KBCK)

Lat: 44.25°NLon: 90.85°WElev: 830ft.

Fog

48°F

9°C

Humidity 100%
Wind Speed Calm
Barometer 30.10 in
Dewpoint 48°F (9°C)
Visibility 0.25 mi
Last update 28 Aug 5:15 am CDT
Extended Forecast for

Merrillan WI

  • Today

    Today: Sunny, with a high near 84. Light and variable wind.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Partly Cloudy

  • Saturday

    Saturday: Showers and thunderstorms, mainly before 4pm, then a slight chance of thunderstorms after 5pm. High near 77. South wind 3 to 8 mph. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 77 °F

    Showers

  • Saturday Night

    Saturday Night: A slight chance of showers between 7pm and 1am. Mostly cloudy, with a low around 62. Southeast wind 3 to 7 mph. Winds could gust as high as 18 mph. Chance of precipitation is 20%.

    Low: 62 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 87. South wind 3 to 6 mph. Chance of precipitation is 20%.

    High: 87 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. Southeast wind 3 to 6 mph.

    Low: 68 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 89. Southwest wind around 6 mph.

    High: 89 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 64. Southwest wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 87 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 84. Light and variable wind.
Tonight
Partly cloudy, with a low around 59. Calm wind.
Saturday
Showers and thunderstorms, mainly before 4pm, then a slight chance of thunderstorms after 5pm. High near 77. South wind 3 to 8 mph. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
A slight chance of showers between 7pm and 1am. Mostly cloudy, with a low around 62. Southeast wind 3 to 7 mph. Winds could gust as high as 18 mph. Chance of precipitation is 20%.
Sunday
A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 87. South wind 3 to 6 mph. Chance of precipitation is 20%.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. Southeast wind 3 to 6 mph.
Monday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 89. Southwest wind around 6 mph.
Monday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 64. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Calm wind becoming southwest around 5 mph in the afternoon.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 62. Calm wind.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 87. Light and variable wind.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61. Calm wind.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87. Calm wind becoming south 5 to 7 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Merrillan WI
 44.45°N 90.82°W
Last Update:
5:27 am CDT Aug 28, 2026
Forecast Valid:
5am CDT Aug 28, 2026-6pm CDT Sep 3, 2026
 
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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