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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit China, check out our Chengdu's climate page.
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%
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 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 49 years of weather observations in Chengdu between 1976 and 2025, 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 →
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unpleasant
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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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit China, check out our Chengdu's climate page.
Temperature Rainfall Sunshine Humidity
See the full Chengdu climate overview or explore weather in China.
