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August 2026 Upper Mississippi River Valley Weather Summary

Current conditions at

La Crosse - La Crosse Regional Airport (KLSE)

Lat: 43.88°NLon: 91.26°WElev: 653ft.

Partly Cloudy

76°F

24°C

Humidity	91%
Wind Speed	SE 5 mph
Barometer	29.85 in (1009.6 mb)
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Heat Index	76°F (24°C)
Last update	4 Sep 6:53 am CDT

More Information:

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

Extended Forecast for

3 Miles SSE La Crosse WI

Today
High: 89 °F
Chance
T-storms then
Slight Chance
Showers
Tonight
Low: 70 °F
Mostly Clear
then Patchy
Fog
Saturday
High: 87 °F
Areas Fog
then Mostly
Sunny
Saturday Night
Low: 66 °F
Partly Cloudy
Sunday
High: 84 °F
Partly Sunny
Sunday Night
Low: 65 °F
Slight Chance
Showers
Labor Day
High: 82 °F
Chance
Showers
Monday Night
Low: 67 °F
Mostly Cloudy
then Chance
Showers
Tuesday
High: 85 °F
Showers
Likely

Detailed Forecast

Today

A chance of showers and thunderstorms before 1pm, then a slight chance of showers between 1pm and 2pm. Mostly cloudy, then gradually becoming sunny, with a high near 89. Heat index values as high as 99. South wind around 8 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight

Patchy fog after 1am. Otherwise, increasing clouds, with a low around 70. Southwest wind around 6 mph becoming north after midnight.

Saturday

Areas of fog before 10am. Otherwise, mostly sunny, with a high near 87. Northeast wind 3 to 5 mph.

Saturday Night

Partly cloudy, with a low around 66. Calm wind.

Sunday

Partly sunny, with a high near 84. Light southeast wind.

Sunday Night

A 20 percent chance of showers. Mostly cloudy, with a low around 65. Light southeast wind.

Labor Day

A 30 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 82. Calm wind becoming south around 6 mph in the morning.

Monday Night

A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67. Southeast wind 6 to 8 mph, with gusts as high as 21 mph.

Tuesday

Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 85. South wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

Tuesday Night

Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 69. South wind 5 to 7 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

Wednesday

Mostly sunny, with a high near 86. West wind 3 to 7 mph.

Wednesday Night

A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64. Light northwest wind.

Thursday

A 20 percent chance of showers. Partly sunny, with a high near 80. Light northwest wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 18 mph.