Shanghai Weather in September

🇨🇳 China

27°C

High

21°C

Low

Rain Days

Sunshine

70%

Humidity

Asia › 🇨🇳 China › Shanghai

Updated: March 2026

Is September a Good Time to Visit Shanghai?

6/10

Good

September is a good time to visit Shanghai (6/10). With 9 daily sunshine hours and only 11 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 4th sunniest of the year in Shanghai. Culture-focused travellers and those who prefer lighter crowds will find September a practical choice, with prices running lower than peak July without sacrificing all the good weather. October offers a similar profile at lower hotel rates if dates are flexible. The main practical note: Shanghai's popular sites are busiest between 10am and 3pm regardless of season. Arriving at opening time or after 4pm makes a significant difference to the experience. Planning tips: accommodation is generally available without long lead times, and flight prices are typically lower than peak season. Flexible travellers will find the best deals by booking 2-4 weeks ahead. Mid-week arrivals consistently unlock lower hotel rates than weekend check-ins.

vs August:31°C avg high

Based on 30-year climate normals (1991 to 2020), September in Shanghai averages 27°C by day and 21°C overnight, a range that places it firmly in the warmer tier of the annual calendar. The month records approximately 9 sunshine hours per day and 106mm of total rainfall across 11 wet days, giving it a sunshine-to-rain ratio that is broadly workable for most itineraries.

27°C

Avg High

21°C

Avg Low

11 days

Rain Days

Sunshine

70%

Humidity

Temperature in Shanghai in September

The 6°C day-night temperature range is typical for continental climates: a light jacket in the morning that you shed by midday and need again after sunset. Humidity averages 70%, which is comfortable for most visitors. On warmer days, lighter fabrics help with the mild stickiness in the afternoon. UV index averages 6 this month, classed as moderate. Sunscreen is a sensible precaution for extended outdoor time, particularly at midday. Wind averages 18 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 81°F average high, 70°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).

Temperature in September

Monthly Precipitation (mm)

What to Wear in Shanghai in September

Morning21°CBefore the day warms up

Afternoon27°CPeak daytime temperature

Evening24°CAfter sunset cools down

Packing for Shanghai in September means dressing for 27°C days and 21°C evenings. A light cotton tee with a casual overshirt works well at 27°C, the overshirt doubles as a layer for air-conditioned venues. Evening temperatures settle at 21°C, a modest 6°C drop that a light cardigan or denim jacket covers. Comfortable walking trainers are the versatile choice for both outdoor sightseeing and indoor venues. A compact foldable umbrella weighs almost nothing and earns its keep across 11 potential rainy days. For temple and religious site visits, carry a lightweight scarf or sarong to cover shoulders and knees, required at most major sites across the region.

💡

Local tip: Temple and religious site visits require covered shoulders and knees in most of Shanghai's heritage areas. A lightweight scarf or sarong weighs almost nothing and solves the problem instantly.

Events in Shanghai in September

September has no major festivals or public holidays in Shanghai, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.

What to Pack for Shanghai in September

Based on 27°C average highs and 11 rainy days

Light layers for morning and evening
Breathable T-shirts and comfortable trousers
UV-protective sunglasses
Quick-dry travel towel
Anti-chafe balm for long walking days
Moisture-wicking synthetic fabrics for active days
Compact folding umbrella
Waterproof outer layer or packable rain jacket
Quick-dry clothing that recovers fast after a shower
SPF 30+ sunscreen
Comfortable walking shoes (a second pair lets the first air out overnight)
Universal travel adapter
Small day pack for city exploration
Reusable water bottle

Best Activities in Shanghai in September

Explore outdoor markets and street food stallsMid-morning (10am-12pm)At 27°C, the temperature is ideal for extended walking without overheating
Guided walking tour of the historic centreMorning or late afternoonComfortable temperatures allow several hours on foot without fatigue
Visit rooftop viewpoints and observation decksGolden hour (1 hour before sunset)Warm clear evenings provide exceptional visibility for panoramic photography
Day trip to the surrounding countryside or coastFull day (depart by 8am)September is reliably dry enough for rural day trips without weather risk
Afternoon in a world-class museum or galleryAfternoon (2-5pm)Pairs well with outdoor morning activities and provides a mid-day rest from sightseeing
Coffee-house or traditional cafe culture experienceMid-morning or post-lunchA cultural ritual in this region that rewards slow appreciation regardless of weather
Evening live music, theatre, or opera performanceEvening shows typically at 7-9pmConsistent evening temperatures make getting to and from evening venues comfortable
Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningSeptember brings distinct seasonal changes to public green spaces worth exploring
Seek out chilled local specialities: cold-brew tea, ice desserts, or chilled seafood at street-level stallsAny time; most atmospheric in evening marketsHot-weather street food culture peaks in September, with vendors setting up specifically for warm evenings

Why is Shanghai warm in September?

Shanghai's September heat is driven by the Asian summer monsoon system, as the low-pressure cell that forms over the heated landmass draws warm, humid air from the oceans. The result is temperatures averaging 27°C with high moisture in the air. Overnight temperatures remain elevated at 21°C, as clouds and humidity prevent the earth from radiating heat away after sunset. Climate data: Open-Meteo ERA5 (1991–2020).

Sunshine Hours

The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.

UV Index

A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate -- wear sunscreen. UV 6-7: High -- hat and SPF 30+ essential. UV 8-10: Very High -- limit midday exposure. UV 11+: Extreme -- seek shade between 10am-4pm.

Rain Days

A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.

Humidity

Relative humidity as a percentage. Below 40%: Dry -- skin and throat may feel parched. 40-60%: Comfortable -- ideal for most people. 60-80%: Sticky -- light, breathable fabrics recommended. Above 80%: Muggy -- heat feels more intense; quick-dry clothing is essential.

Frequently Asked Questions: Shanghai in September

In September, Shanghai experiences average highs of 27°C (81°F) and lows of 21°C (70°F). Expect around 11 rainy days and 9 hours of sunshine per day, with humidity averaging 70%. The 6°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an overshirt or cardigan handles the cooler evenings. UV index averages 6, so sun protection is advisable on clear days.

Shanghai typically sees 11 rainy days in September, with total precipitation of around 106mm. Rain is moderate and manageable. Showers tend to pass quickly, and a light rain layer or foldable umbrella is sufficient protection for most days. For context, the driest month in Shanghai typically sees 4-6 fewer rain days than September.

Pack light layers, a light jacket for evenings, comfortable walking shoes, and sunscreen for Shanghai in September. Daytime temperatures of 27°C are pleasant, but the evening drop to 21°C means a jacket is essential if you plan to be out after dark. With 11 rainy days, bring a compact umbrella or waterproof jacket for unexpected showers. Comfortable walking shoes are a priority given the amount of ground most visitors cover.

Yes, September is an excellent time to visit Shanghai. With 9 daily sunshine hours and only 11 rainy days, conditions are ideal for sightseeing and outdoor activities. Temperatures averaging 27°C during the day are comfortable for long walks and outdoor dining. This is peak travel season, so booking accommodation in advance and arriving at popular attractions early in the morning helps avoid the busiest periods.

The average high temperature in Shanghai in September is 27°C (81°F), and the average low is 21°C (70°F). The mean daily temperature is approximately 24°C (75°F). The day-to-night range of 6°C is moderate, meaning a single light jacket covers most situations. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.

The best month to visit Shanghai is generally May. May offers the most sunshine at 9 hours per day and only 10 rainy days. Average temperatures reach 24°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around May gives you the best chance of dry, bright weather.

September is shoulder or low season in Shanghai, meaning fewer tourists and generally lower prices than peak months. With 9 sunshine hours and 11 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.

In September, Shanghai suits a range of activities thanks to mild temperatures around 27°C. Mix of indoor and outdoor activities works well given the moderate chance of rain. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 9 hours of sunshine, parks and waterfront walks are particularly enjoyable.

September ranks 4th sunniest of the year in Shanghai, with an average 9 daily sunshine hours. The driest months are October, December, and November. July is the hottest month (31°C avg high); January is the coolest (8°C). From here, temperatures fall 5°C into October. Compared to last month (August: 31°C high, 16 rain days), September is cooler and drier. September sits in the middle of the annual sunshine ranking for Shanghai, offering a reasonable balance of good weather and manageable crowds.

Year-Round Climate

Month	High	Low	Rain Days	Sun	Details
January	8°C	1°C	8	6h	View
February	10°C	3°C	9	6h	View
March	14°C	7°C	11	7h	View
April	19°C	12°C	10	8h	View
May	24°C	17°C	10	9h	View
June	27°C	21°C	15	8h	View
July	31°C	25°C	14	10h	View
August	31°C	25°C	16	10h	View
September	27°C	21°C	11	9h	View
October	22°C	16°C	6	8h	View
November	17°C	10°C	7	7h	View
December	11°C	4°C	6	7h	View

Other Months in Shanghai

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Plan Your Trip to Shanghai

Best Time to Visit Shanghai

Data Sources for Shanghai

Shanghai on Wikipedia Open-Meteo Climate API NOAA National Centers UK Met Office WMO GeoNames

Climate normals represent 30-year averages (1991-2020). Individual years may vary.