Shanghai Weather and Climate in September

September in Shanghai marks the transition from hot, humid summer to early autumn. Daytime highs typically range from 27–30°C (81–86°F) in the early part of the month, gradually cooling to 24–27°C (75–81°F) by late September. Nights become more comfortable, often dropping to 19–23°C (66–73°F). Rainfall is moderate, averaging around 130–160 mm over 9–13 days, mostly as short showers, with humidity slowly beginning to ease.

This is one of the best shoulder seasons for visiting Shanghai. You’ll enjoy relatively pleasant weather for sightseeing, beautiful late-summer greenery with early autumn touches, fewer crowds than July and August, and more attractive hotel rates.

Shanghai Municipality

31.2300°N, 121.4700°E

Sunrise 13:18

Sunset 02:40

28°C

Overcast clouds

Feels Like 32°C

Humidity 83%

Wind 4 m/s

Pressure 1001 hPa

Visibility 10 km

Clouds 86%

2026-08-13 11:49 Data by OpenWeatherMap

Shanghai Season in September: Early Autumn

September brings the welcome shift from humid summer to milder early autumn weather in Shanghai. Days remain warm and suitable for outdoor exploration, while mornings and evenings feel increasingly refreshing. Precipitation decreases compared to peak summer months, offering better conditions for walking and city sightseeing.

It is widely regarded as one of the best months to visit Shanghai — comfortable temperatures, manageable rainfall, and a more relaxed atmosphere at major attractions.

Cooling but Still Warm Temperatures

September delivers easing summer heat to Shanghai. In the first half of the month, daytime highs often reach 28–30°C (82–86°F) on sunny days, with lows around 22–24°C (72–75°F). Midday can still feel warm, but it is noticeably more comfortable than the peak summer months.

In the second half, temperatures cool gradually. Highs typically hover around 24–27°C (75–81°F), while lows fall to 19–22°C (66–72°F). The growing day-night temperature difference makes evening strolls along the Bund particularly pleasant.

Moderate Precipitation and Occasional Showers

Shanghai sees moderate rainfall in September, averaging about 130–160 mm across roughly 9–13 days, usually as short showers or thunderstorms. Rainfall is lower than in July and August, though occasional heavier downpours can still occur.

Cloudy and partly sunny days are common. Brief rain can refresh the air and add a misty charm to the Huangpu River and skyline views.

4 Days Shanghai City Tour with Xitang Water Town Exploration

Tour Route：Shanghai-Xitang Water Town in Jiaxing

Tour Type：Ancient Towns and Villages Tours / Small Group Tours / Photography Tours

4 Days

3 Places

View Detail

Daylight Hours and Sunshine

Daylight remains long, starting at around 12.5 hours early in the month and shortening to about 11.8 hours by late September. Sunshine hours average 5–7 per day. The UV index is still relatively high on clearer days, so sun protection is recommended.

Averages for Shanghai Weather in September

Temperature: 23–24°C / 73–75°F High Temperature: 27–28°C / 81–82°F Low Temperature: 20–22°C / 68–72°F Humidity: ~76–80% Rainfall: 130–160 mm Rainy Days: 9–13 days

A Recommended Visiting Month

September is highly recommended for visiting Shanghai. As summer heat and crowds ease, you can enjoy the Bund, Yu Garden, and modern skyline with more space and comfort. Hotel rates are often better than in peak summer.

The warm yet pleasant weather and soft early autumn light beautifully enhance the mix of historic and futuristic scenery, making it ideal for photography, walking tours, and river cruises.

Recommended Outfits for Visiting Shanghai in September

Daytime: Light, breathable clothing such as short-sleeve shirts, polo shirts, shorts or light trousers, and comfortable dresses. Moisture-wicking fabrics work well due to remaining humidity.

Evenings: Bring a thin long-sleeve shirt, light sweater, or jacket for cooler evenings and heavily air-conditioned indoor spaces.

Shoes: Comfortable walking shoes or sneakers are essential — you’ll do plenty of walking along the Bund, Nanjing Road, and historic areas.

Others: A compact umbrella or light rain shell for occasional showers, high-SPF sunscreen and sunglasses, a reusable water bottle, and a small daypack.

Advice for Your Shanghai Trip in September

September offers one of the most enjoyable windows to experience Shanghai’s unique blend of old and new. Stroll along the Bund at sunset, explore the classical Yu Garden, visit the Shanghai Tower or Oriental Pearl Tower, wander through the French Concession, or take a Huangpu River cruise. Lighter crowds allow you to enjoy the city at a relaxed pace.

Tips:

• Layer clothing lightly to adjust to temperature changes and strong air conditioning indoors.
• Carry a small umbrella as showers can appear suddenly.
• Book tickets for popular attractions (such as the Shanghai Tower observatory) in advance on weekends.
• Enjoy seasonal Shanghai cuisine, including fresh hairy crabs if they are in season.

Recommended Attractions: The Bund, Yu Garden, French Concession, Nanjing Road, Shanghai Tower, Oriental Pearl Tower, Tianzifang, and Zhujiajiao Water Town (day trip).

September delivers warm, comfortable weather with early autumn charm in Shanghai. Pack light layers and rain gear, embrace the city’s vibrant energy, and prepare for a memorable trip. Safe travels！