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August 2026 Upper Mississippi River Valley Weather Summary

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Winona, Winona Municipal Airport-Max Conrad Field (KONA)

Lat: 44.08° N Lon: 91.7° W Elev: 656 ft.

Fair

77°F

25°C

Humidity	83%
Wind Speed	SE 3 mph
Barometer	29.85 in
Dewpoint	72°F (22°C)
Visibility	10.00 mi
Heat Index	78°F (26°C)
Last update	3 Sep 8:55 pm CDT

More Information:

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

Detailed forecast for

Buffalo County

Tonight

Partly cloudy. A slight chance of showers and thunderstorms this evening, then a chance of showers and thunderstorms after midnight. Lows around 70. Southeast winds around 5 mph. Chance of rain 50 percent.

Friday

Mostly sunny. A slight chance of showers in the morning. Humid with highs in the upper 80s. Light winds, becoming west in the afternoon. Chance of rain 20 percent. Heat index values in the mid 90s in the afternoon.

Friday Night

Partly cloudy. Humid with lows in the upper 60s. Light winds.

Saturday

Mostly sunny. Highs in the mid 80s. Light winds.

Saturday Night

Partly cloudy. Lows in the mid 60s. Light winds.

Sunday

Partly sunny with a chance of showers. Highs in the lower 80s. Chance of rain 30 percent.

Sunday Night

Mostly cloudy with a chance of showers and thunderstorms. Lows in the mid 60s. Chance of rain 30 percent.

Labor Day

Partly sunny in the morning, then becoming mostly cloudy. A chance of showers. Highs in the lower 80s. Chance of rain 40 percent.