What September feels like in Chengdu
In Chengdu, September brings early autumn. Days are warm enough for short sleeves, and time outdoors is easy. The gap between afternoon and night is small, so nights stay warm and the temperature hardly changes after dark. The air is muggy, so it feels hotter than the thermometer suggests.
Rain in Chengdu in September
Rain is part of normal life this month, falling on about every other day. Wet days average about 8.1 mm (0.3 in), enough to soak you without an umbrella. The yearly figure is similar, around 8.4 mm per wet day. It is among the three wettest months of the year.
Daylight and sunshine in September
On 15 September the sun rises at about 6:47 am and sets around 7:11 pm local time, giving 12 h 24 min of daylight. Days are getting shorter: 54 min less daylight than in mid-August. Measured sunshine covers about 51% of the daylight — sun and cloud share the day.
How September compares to the rest of the year
September is the 5th warmest month of the year in Chengdu. Against August, the average high is 4.6°C (8.3°F) lower, with 121 mm less rain. October is cooler again. By October, typical highs are 21.2°C (70.2°F).
Who September suits
- Sightseeing: less ideal — rain falls on more than half the days.
- Parks & outdoor: less ideal — afternoons are too warm to linger outside.
- Museums & indoor: a good choice — with rain on most days, galleries and museums make easy plans.
Tips for visiting Chengdu in September
Rain Protection
A compact umbrella and a light waterproof jacket.
Quick questions
How warm is Chengdu in September?
It feels warm: typical highs are 26.1°C (79°F), with lows near 19.7°C (67.5°F).
Does it rain a lot in Chengdu in September?
Yes, fairly — rain falls about every other day and totals about 138 mm, so an umbrella is worth carrying.
What should I wear in Chengdu in September?
Pack rain protection. Evenings feel similar to the day, so the same clothes work from morning to night.
Is September or October better for visiting Chengdu?
October scores better on our climate ranking (#5 of 12 vs #10), rated Good against Good. October is cooler and has fewer rainy days.