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.

Partly Cloudy

64°F

18°C

Humidity 51%
Wind Speed SE 7 mph
Barometer 30.36 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 22 Sep 2:55 pm CDT
Extended Forecast for

Merrillan WI

  • Tonight

    Tonight: Mostly clear, with a low around 36. East wind around 5 mph becoming calm in the evening.

    Low: 36 °F

    Mostly Clear

  • Wednesday

    Wednesday: Patchy frost before 8am. Otherwise, mostly sunny, with a high near 65. Calm wind becoming east 5 to 7 mph in the morning.

    High: 65 °F

    Patchy Frost
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 41. Light east wind.

    Low: 41 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Partly sunny, with a high near 66. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 66 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 69. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 69 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 47. Calm wind.

    Low: 47 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of showers after 1pm. Mostly cloudy, with a high near 65. Southeast wind 3 to 8 mph. Winds could gust as high as 18 mph.

    High: 65 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A 50 percent chance of showers. Cloudy, with a low around 49. Southeast wind around 6 mph becoming calm in the evening.

    Low: 49 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 36. East wind around 5 mph becoming calm in the evening.
Wednesday
Patchy frost before 8am. Otherwise, mostly sunny, with a high near 65. Calm wind becoming east 5 to 7 mph in the morning.
Wednesday Night
Increasing clouds, with a low around 41. Light east wind.
Thursday
Partly sunny, with a high near 66. Calm wind becoming southeast around 5 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 46. Calm wind.
Friday
Partly sunny, with a high near 69. Calm wind becoming southeast around 5 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 47. Calm wind.
Saturday
A 30 percent chance of showers after 1pm. Mostly cloudy, with a high near 65. Southeast wind 3 to 8 mph. Winds could gust as high as 18 mph.
Saturday Night
A 50 percent chance of showers. Cloudy, with a low around 49. Southeast wind around 6 mph becoming calm in the evening.
Sunday
A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 68. Calm wind becoming south around 5 mph.
Sunday Night
Mostly cloudy, with a low around 51. Calm wind.
Monday
Partly sunny, with a high near 73. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 53. Calm wind.
Tuesday
A 40 percent chance of showers. Mostly cloudy, with a high near 69. Calm wind becoming south 5 to 8 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:
1:21 pm CDT Sep 22, 2026
Forecast Valid:
3pm CDT Sep 22, 2026-6pm CDT Sep 29, 2026
 
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Additional Resources

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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