Short answer
The rainy season runs from about June to September, with frequent showers and cloudy days. It is rarely continuous rain, but the mountain is often hidden and trails are muddy. Pack a rain jacket and keep plans flexible.
When and how it rains
The monsoon typically arrives in June and eases in September. Rain often falls in afternoon or evening showers, with dry mornings. Some days are completely overcast, and some bring heavy downpours. It is not usually all-day drizzle for weeks.
The basin is green and humid, and the mountain is frequently in cloud. The cableway can close for wind or low visibility. The July guide and August guide describe the worst of it.
What to do when it rains
Use the mornings for outdoor plans and keep afternoons for museums, food, and the old towns. The Dongba museum, Baisha's murals, Naxi music concerts, and mushroom hotpot are all rain-friendly. The rainy-day route has a full plan.
For hiking, check trail conditions; Tiger Leaping Gorge can be slippery and the river path may close. Do not attempt exposed trails in heavy rain. The gorge guide explains the risks.
Related questions
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