China Shanghai Weather in September (heat easing + Mid-Autumn) — Climate Guide
September (heat easing + Mid-Autumn) in Shanghai is Improving
Shanghai Weather in September (heat easing + Mid-Autumn) — Quick Answer
As of 2026- Avg temp
- 28° / 21°
- Rainfall
- 95mm · 11 days
- Crowds
- Moderate
As of 2026, Shanghai in September (heat easing + Mid-Autumn) averages a high of 28°C and low of 21°C with 95mm of rain over about 11 days. T-shirts + light cardigan for evenings.
September (heat easing + Mid-Autumn) is Improving for Shanghai.
Heat easing — 21/28°C. Mid-Autumn Festival brings lantern decorations + mooncake culture. Hairy crab season begins (Yangcheng Lake)! Hotels return to moderate pricing.
Travel score
Shanghai September (heat easing + Mid-Autumn) Weather Stats
Avg High
28°C
Avg Low
21°C
Rainy Days
11
95mm total
Sunshine
6h
Daily avg
Humidity
78%
Warm + comfortable
UV Index
7
High
Wind
7 km/h
Gusts 14
Sea Temp
26°C
Warm
Crowds
Moderate
At attractions
September (heat easing + Mid-Autumn) Sunrise & Sunset
Air Quality
PM2.5
35 μg/m³
PM10
55 μg/m³
Status
Moderate
Feels-Like Temperature & Wind
Feels like
Daytime
30°C
Nighttime
21°C
Humidity and wind affect how the actual temperature feels.
Wind
7 km/h
Max gust 14 km/h
Activities Recommended for September (heat easing + Mid-Autumn)
September (heat easing + Mid-Autumn) Travel Pros & Cons
Pros
- Heat easing
- Mid-Autumn Festival cultural
- Hairy crab season begins
- Hotels moderate
Cons
- Still 28°C peak
- Mid-Autumn weekend crowded
September (heat easing + Mid-Autumn) Events & Festivals
- Mid-Autumn Festival (lunar mid-September)
- Hairy crab season begins
Shanghai in September (heat easing + Mid-Autumn) — Full Picture
Heat easing — 21/28°C. Mid-Autumn Festival brings lantern decorations + mooncake culture. Hairy crab season begins (Yangcheng Lake)! Hotels return to moderate pricing.
What to Wear & What to Pack
T-shirts + light cardigan for evenings.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
19°C
11°C
13/mo
Summer (Jun·Jul·Aug)
31°C
23.7°C
12.7/mo
Autumn (Sep·Oct·Nov)
Current22.7°C
15.7°C
9/mo
Winter (Dec·Jan·Feb)
9.7°C
2.3°C
8.3/mo
Shanghai Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 8° | 1° | 8d·45mm | 4h | 75% | 3 | Quiet | Low season | |
| 10° | 2° | 9d·60mm | 5h | 75% | 4 | Moderate | Peak | |
| 14° | 6° | 12d·80mm | 5h | 76% | 5 | Moderate | Shoulder | |
| 19° | 11° | 13d·95mm | 5h | 78% | 7 | Busy | Peak | |
| 24° | 16° | 14d·105mm | 5h | 80% | 8 | Busy | Peak | |
| 28° | 21° | 16d·175mm | 5h | 85% | 9 | Moderate | Shoulder | |
| 33° | 25° | 11d·130mm | 7h | 82% | 10 | Quiet | Low season | |
| 32° | 25° | 11d·145mm | 7h | 82% | 10 | Quiet | Low season | |
| 28° | 21° | 11d·95mm | 6h | 78% | 7 | Moderate | Shoulder | |
| 23° | 16° | 8d·50mm | 6h | 76% | 5 | Very busy | Peak | |
| 17° | 10° | 8d·55mm | 5h | 73% | 4 | Busy | Shoulder | |
| 11° | 4° | 8d·50mm | 4h | 75% | 3 | Moderate | Shoulder |
View Other Months
Shanghai September (heat easing + Mid-Autumn) Hotel Picks
Frequently Asked Questions
Is September (heat easing + Mid-Autumn) a good time to visit Shanghai?
Shanghai in September (heat easing + Mid-Autumn) is Improving. Tourist crowds are moderate and flight/hotel prices are shoulder.
What's the average temperature in Shanghai in September (heat easing + Mid-Autumn)?
Shanghai September (heat easing + Mid-Autumn) averages a high of 28°C and a low of 21°C.
Does it rain much in Shanghai in September (heat easing + Mid-Autumn)?
Shanghai September (heat easing + Mid-Autumn) averages 95mm of rainfall over about 11 rainy days.
What should I wear in Shanghai in September (heat easing + Mid-Autumn)?
T-shirts + light cardigan for evenings.
What time are sunrise and sunset in Shanghai in September (heat easing + Mid-Autumn)?
Shanghai September (heat easing + Mid-Autumn) sunrise is 05:35 and sunset is 17:55, with 12h 20min of daylight.
What's the air quality like in Shanghai in September (heat easing + Mid-Autumn)?
Shanghai September (heat easing + Mid-Autumn) air quality (AQI) averages 75, rated Moderate. PM2.5 averages 35μg/m³.
What activities are recommended in Shanghai in September (heat easing + Mid-Autumn)?
In September (heat easing + Mid-Autumn), Shanghai is great for Hairy crab dinners, Mid-Autumn lantern displays, Bund + Pudong walks.
Is September (heat easing + Mid-Autumn) peak season in Shanghai?
Shanghai September (heat easing + Mid-Autumn) crowds are moderate and prices are shoulder. You can travel relatively comfortably without long queues.
Best Months to Visit Shanghai
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Planning a September (heat easing + Mid-Autumn) trip to Shanghai?
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Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.