The Li River: A Journey Through China’s Most Breathtaking Landscape
Explore the Li River, China's breathtaking landscape with majestic mountains, serene waters, and picturesque views. A must-see for every traveler.
Chengdu Weather in September
Thinking of visiting Chengdu in September? Expect high temperatures reaching 27°C (81°F) during the day, dropping to 20°C (68°F) at night, and note that quite a bit of rainfall is likely.
Rainfall in Chengdu in September
Climate statistics over the past 30 years suggest around 17 days of rain, with 145 mm (5.7 in) average for the month. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.
Temperature in Chengdu in September
September in Chengdu sees highs of 27°C (81°F) and lows of 20°C (68°F) overnight. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. At 20°C (68°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Chengdu in September
The month is characterized by fewer sunny days, with roughly 79 hours hours of sunshine. Ideal for those who prefer a cooler, cloudier climate.If you prefer enjoying temperate temperatures and rain-free days, March, April, May, October and November typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Chengdu Temperature in September
Min Temperature
20°C (68°F)
Max Temperature
27°C (81°F)
Chance of Rain
58%
Precipitation
145 mm (5.7 in)
Rainy days
17 days
Humidity
85%
Sunshine
79 hours
Percentage Sunshine
21%
Chengdu Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Chengdu - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Chengdu typically drop from around 28°C (82°F) at the start of September to approximately 24°C (75°F) by the end. Nights are pleasant, with lows typically ranging from 18°C (64°F) to 22°C (72°F).
Average temperatures in September
Historical weather records for Chengdu in September
Browse day-by-day weather records for Chengdu spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Chengdu historical weather extremes in September
Based on 50 years of weather observations in Chengdu between 1976 and 2026, these are the recorded extremes.
- The warmest day in September was on September 2, 2024, with a maximum of 38°C (100°F).
- On September 28, 1988, Chengdu saw its coldest September day with temperatures maxing out at 15°C (59°F).
- The lowest overnight temperature recorded in September was 12°C (54°F) (September 27, 1997).
Best Places in China in September
Find out more about the weather in China and which places have the best travel conditions in this month. See all of China in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Chengdu in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. You can probably leave your sunglasses at home, because sunny days are pretty rare this month.
What To Do in Chengdu in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Chengdu 3-Day Forecast
More climate data for Chengdu
Temperature Rainfall Sunshine Humidity
See the full Chengdu climate overview or explore weather in China.
Popular in September
Where to go in September - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
The Li River: A Journey Through China’s Most Breathtaking Landscape
Go to China's Zhangjiajie National Park with the highest, the fastest, largest-loaded outdoor elevator in the world
You won't find this unique landscape anywhere else in the world. Thousands of floating mountains overgrown with trees at the top dominate this fairy tale landscape.
Go to Xinjiang in China
In Xinjiang you get to see a mix of East and Central Asia. An experience that you might want to add to your bucket list. You can travel through the province as if you are following an ancient silk route.
Mount Kailash
The best time for a Kailash tour/trekking is from mid-May to mid-October when the temperature is most pleasant. It is warm, dry and sunny in that period.