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Shanghai in September: Weather, Average temperature and Climate

Discover the weather for Shanghai in September and if it’s a good time to travel (based on historical data).
Check flight prices to Shanghai on Avionero:
September

Weather in Shanghai in September 2025

OK Weather
Warm
🌧️
Rainy
September could be a good time to visit Shanghai, as the weather is generally fine. The average high temperature is around +81°F, and there are typically 6 sunny days in September. However, expect about 15 rainy days, and total monthly rainfall of approximately 127 mm. The weather is changeable so pack for every eventuality. Search flights in one click on Avionero.

Average weather

☀️
+81°F
Avg. max. temperature
+55°F
Min.
+100°F
Max.
127 mm
Total precipitation
76%
Avg. humidity
3 m/s
Avg. wind
6 ☀️
Sunny Days
7 ⛅️
Cloudy
15 🌦
Rainy
Our opinion: Shanghai has OK weather in September.

Average temperature in Shanghai in September

Here are the expected maximum, average and minimum temperatures in Shanghai for September based on the historical data.
Last Year
Historical Data

The expected average maximum temperature in September is +84°F with a maximum of +91°F and a minimum of +68°F.

The average maximum temperature goes down 38% by the end of the month, compared with the beginning of the month, from +84°F to +75°F.

Is Shanghai warm or cold in September?

Shanghai is typically warm in September.

Maximum temperatures go down compared to the previous month from +90°F to +81°F. The minimum temperature also goes down from +79°F to +72°F.

It’s generally warm, but pack a long-sleeve shirt for evenings.

Take a look at how September is compared to other months in Shanghai:

Climate in Shanghai in September

Shanghai weather looks like this, on average, in September and the surrounding months.
AugustSeptemberOctober
Avg. temperature
+90°F+81°F+73°F
Min. temperature
+68°F+55°F+41°F
Max. temperature
+106°F+100°F+95°F
Rainfall
172 mm127 mm66 mm
Wind
3 m/s3 m/s2 m/s
Humidity
78%76%73%
Air pressure
1005 HPa1011 HPa1018 HPa
Sunny days
4612
Cloudy days
579
Rainy days
171510
Snowy days
000

September weather is still as ok as in August. It’s getting colder in September. From +90°F in the day, the average maximum temperature lowers to +81°F. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 172 mm to 127 mm. It feels drier, as humidity decreases from 78% to 76%. The average wind speed doesn’t change much during September, staying around 3 m/s. The good news is there are likely to be more sunny days in September, from 4 to 6.

But maybe it is worth considering traveling in October as the weather gets better.

Wind

Wind speed in Shanghai in September based on historical data.
Last Year
Historical Data

The average wind speed is 3 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.

The average wind speed in Shanghai is gradually increasing during September, going from 4 m/s to 4 m/s over the course of the month.

Rain

Amount of rainfall in mm during September in Shanghai based on historical data.
Last Year
Historical Data
Total precipitation in September is about 199 mm, with a 63% chance of rain on a typical day. The maximum amount of rainfall per day is around 53 mm, which is considered heavy rain. September is a pretty wet month with over 19 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Shanghai wettest month is June, where a typical day has a 57% chance of precipitation and 262 mm of rainfall per day. December, on the other hand, is the driest month with a mere 23% chance of precipitation and 37 mm of rainfall per day.

How was the weather last September in Shanghai?

This is the weather in Shanghai in September 2023:
1 September
☀️
+84°F
2 September
☁️
+88°F
3 September
🌧️
+86°F
4 September
🌧️
+90°F
5 September
☀️
+86°F
6 September
☁️
+89°F
7 September
☀️
+88°F
8 September
☀️
+88°F
9 September
☀️
+88°F
10 September
☀️
+90°F
11 September
☀️
+88°F
12 September
☀️
+86°F
13 September
🌧️
+81°F
14 September
🌧️
+77°F
15 September
🌧️
+82°F
16 September
☀️
+82°F
17 September
☀️
+88°F
18 September
☀️
+90°F
19 September
☀️
+92°F
20 September
🌧️
+86°F
21 September
🌧️
+75°F
22 September
🌧️
+73°F
23 September
🌧️
+74°F
24 September
☀️
+75°F
25 September
🌧️
+86°F
26 September
☀️
+84°F
27 September
🌧️
+85°F
28 September
🌧️
+83°F
29 September
☁️
+84°F
30 September
☀️
+75°F
In September 2023 Shanghai had 15 sunny days, 3 cloudy days, and 12 rainy days. The average maximum temperature was +84°F, with an absolute maximum of +91°F and a minimum of +73°F. The average humidity was 84%, with a maximum of 100% and a minimum of 52%. The average wind speed was 3 m/s, with a maximum of 8 m/s and a minimum of 0 m/s.
Are you planning a trip in September?

Climate Change Over the Years

This is how Shanghai climate has changed over the last 43 years.

The climate in Shanghai in September has not changed that much over the last 43 years.

The average temperature was the lowest in 1980 (+65°F) and the highest in 2016 (+72°F). The driest year was 2003 with only 716 mm of rainfall, and the wettest year was 2023 with 3129 mm.

FAQ

Frequently asked questions about the weather in Shanghai in September:

Is September a good time to visit Shanghai?

It’s always a good time to visit Shanghai, but the weather is changeable in September, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.

Can you sunbathe in Shanghai in September?

September is warm in Shanghai. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.

Is Shanghai rainy in September?

Shanghai is often rainy in September. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.

Is it sunny in Shanghai in September?

Usually, it’s not very sunny in Shanghai in September, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.

Other cities in China

Check out the weather for other cities in China.

Monthly weather in Shanghai

Source of the data

For this page, we’ve looked at the typical weather in Shanghai, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.