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August 2026 Upper Mississippi River Valley Weather Summary

Current conditions at

Black River Falls Area Airport (KBCK)

Lat: 44.25°NLon: 90.85°WElev: 830ft.

Fair

85°F

29°C

Humidity	71%
Wind Speed	SE 5 mph
Barometer	29.90 in
Dewpoint	74°F (23°C)
Visibility	10.00 mi
Heat Index	93°F (34°C)
Last update	4 Sep 10:55 am CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

12 Miles S Neillsville WI

Today
High: 88 °F
Mostly Sunny
Tonight
Low: 66 °F
Partly Cloudy
then Patchy
Fog
Saturday
High: 84 °F
Areas Fog
then Mostly
Sunny
Saturday Night
Low: 61 °F
Partly Cloudy
Sunday
High: 82 °F
Partly Sunny
Sunday Night
Low: 61 °F
Mostly Cloudy
Labor Day
High: 81 °F
Chance
Showers
Monday Night
Low: 62 °F
Slight Chance
Showers then
Chance
Showers
Tuesday
High: 82 °F
Showers
Likely

Detailed Forecast

Today

Mostly sunny, with a high near 88. Southwest wind around 6 mph.

Tonight

Patchy fog after 2am. Otherwise, partly cloudy, with a low around 66. West wind 5 to 7 mph becoming northeast after midnight.

Saturday

Areas of fog before 10am. Otherwise, mostly sunny, with a high near 84. Northeast wind 3 to 5 mph.

Saturday Night

Partly cloudy, with a low around 61. Light east wind.

Sunday

Partly sunny, with a high near 82. Light southeast wind.

Sunday Night

Mostly cloudy, with a low around 61. Calm wind.

Labor Day

A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 81. Calm wind becoming southeast around 6 mph in the afternoon.

Monday Night

A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 62. Southeast wind around 7 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.

Tuesday

Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 82. Southeast wind 7 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.

Tuesday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66. South wind 5 to 8 mph, with gusts as high as 20 mph.

Wednesday

Partly sunny, with a high near 84. West wind 3 to 8 mph. Winds could gust as high as 20 mph.

Wednesday Night

A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 59. West wind 3 to 6 mph.

Thursday

A 20 percent chance of showers. Partly sunny, with a high near 78. Light northwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 22 mph.