Chengdu in September
In September, Chengdu averages 26°C (79°F) during the day and 20°C (67°F) at night, with frequent rain — about 16 days of the month see precipitation (109 mm total).
ShoulderConditions are comfortable for sightseeing without being sweltering. Expect daily rain or showers, often in heavy bursts.
September offers comfortable temperatures in Chengdu, with some rain to plan around.
How September compares to the rest of the year in Chengdu
September is in the middle of the year for warmth in Chengdu (5th of 12) and one of the wettest months (3rd of 12). Daytime temperature runs 4°C above the annual average (21°C). September runs 4°C cooler than August (30°C) and cools 5°C in October (21°C).
September sunrise & sunset in Chengdu
Times shown for Chengdu local time (Asia/Shanghai), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Chengdu — September
Golden-hour and blue-hour windows for the 15th of September, in Chengdu's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Chengdu in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Shoulder) and Chengdu's popularity.
Crowds & pricing — September in Chengdu
Chengdu is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Why this tier: comfortable tourism weather
Sun & mosquito risk — September in Chengdu
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Chengdu in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 11°C / 51°F | 3°C / 38°F | 12 mm | 5 | — |
| February | 13°C / 55°F | 5°C / 41°F | 19 mm | 6 | — |
| March | 19°C / 66°F | 10°C / 50°F | 38 mm | 11 | — |
| April | 24°C / 74°F | 14°C / 58°F | 79 mm | 12 | — |
| May | 27°C / 80°F | 18°C / 64°F | 93 mm | 14 | — |
| June | 30°C / 85°F | 21°C / 71°F | 124 mm | 14 | — |
| July | 31°C / 87°F | 23°C / 73°F | 288 mm | 20 | — |
| August | 30°C / 87°F | 23°C / 73°F | 280 mm | 21 | — |
| September | 26°C / 79°F | 20°C / 67°F | 109 mm | 16 | — |
| October | 21°C / 70°F | 15°C / 59°F | 57 mm | 12 | — |
| November | 16°C / 61°F | 10°C / 49°F | 19 mm | 6 | — |
| December | 11°C / 52°F | 4°C / 39°F | 14 mm | 5 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Chengdu in September →
Frequently asked questions
How hot is Chengdu in September?
In September, Chengdu averages a high of 26°C (79°F) and a low of 20°C (67°F) — generally warm.
Does it rain a lot in Chengdu in September?
September is quite rainy in Chengdu, with about 16 rainy days on average.
Is September a good time to visit Chengdu?
September is warm but on the rainy side. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Chengdu in September?
Pack light layers for warm days and cooler evenings, plus a compact umbrella or rain jacket. See the full September packing list for Chengdu for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.