January 9° · ☂ 6 February 10° · ☂ 8 March 15° · ☂ 9 April 20° · ☂ 7 ★ May25° · ☂ 7 June 28° · ☂ 11 July 33° · ☂ 10 August 32° · ☂ 8 September 28° · ☂ 9 ★ October23° · ☂ 6 November 18° · ☂ 7 December 11° · ☂ 6 Shanghai in September:properly hot, Shanghai, China · Records from 2006 to 2025. Not a forecast.
Mean high 28° Hottest day 36.4° (2025)
Mean low 23° Coldest night 15.3° (2012)
Rain days 9 days 3-14 by year
Rainfall 145mm Daylight 12.8 → 11.9 h
Shanghai's 12 months i Best: May and October
1 2 3 4 5 6 7 8 9 10 11 12
Trip types Sightseeing on foot Finemuggy and storm risk
Humidity 79% 20 muggy days
Clear days 6 days 10 overcast days
Mean wind 12 km/h Rarely windy
Sunrise / sunset (15th) 05:38 / 18:01 Daylight 12.8 → 11.9 h
Shanghai in September The heat eases. Typhoons are still possible, so keep an eye on the weather news early in the month. The Mid-Autumn Festival falls on the 15th day of the eighth lunar month, between mid-September and early October, and in some years its holiday lands in late September. The sky lifts and days get easier.
It was a hot month: 28°C by day and 23°C after dark. Showers came now and then, about 9 rain days in all, and most of the month stayed dry. Counts moved moderately between years: 3 in 2011, 14 in 2025.
About 9 days a month still climbed past 30°C, the ones where you looked for shade. September 2025 averaged 32.2°C by day, 3.8°C above the 20-year mean. Rain days averaged 17 mm each, so when it rained it rained properly.
Typhoons i 5 of the last 20 years had a tropical storm pass within 300 km this month.
Muifa (2022), 22 km away typhoon strength Bebinca (2024), 35 km away typhoon strength Fung-Wong (2014), 39 km away tropical storm 1 2 3 4 5 1 6 4 7 7 8 5 9 1 10 1 11 12
Date by date i Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
September 1 Wednesday 1 rain in 7 of 20 yrs 7/20 30° 24° September 2 Thursday 2 rain in 9 of 20 yrs 9/20 30° 24° September 3 Friday 3 rain in 9 of 20 yrs 9/20 30° 24° September 4 Saturday 4 rain in 6 of 20 yrs 6/20 30° 24° 1-4 rain on 39% of days 30° 24°
September 5 Sunday 5 rain in 6 of 20 yrs 6/20 30° 24° September 6 Monday 6 rain in 5 of 20 yrs 5/20 30° 24° September 7 Tuesday 7 rain in 5 of 20 yrs 5/20 30° 23° September 8 Wednesday 8 rain in 0 of 20 yrs 0/20 30° 23° September 9 Thursday 9 rain in 6 of 20 yrs 6/20 29° 23° September 10 Friday 10 rain in 3 of 20 yrs 3/20 29° 23° September 11 Saturday 11 rain in 8 of 20 yrs 8/20 29° 23° 5-11 rain on 24% of days 29° 23°
September 12 Sunday 12 rain in 7 of 20 yrs 7/20 29° 23° September 13 Monday 13 rain in 8 of 20 yrs 8/20 29° 23° September 14 Tuesday 14 rain in 9 of 20 yrs 9/20 28° 23° September 15 Wednesday 15 rain in 8 of 20 yrs 8/20 28° 23° September 16 Thursday 16 rain in 8 of 20 yrs 8/20 29° 23° September 17 Friday 17 rain in 5 of 20 yrs 5/20 29° 22° September 18 Saturday 18 rain in 5 of 20 yrs 5/20 28° 22° 12-18 rain on 36% of days 28° 23°
September 19 Sunday 19 rain in 3 of 20 yrs 3/20 29° 22° September 20 Monday 20 rain in 5 of 20 yrs 5/20 28° 22° September 21 Tuesday 21 rain in 6 of 20 yrs 6/20 27° 22° September 22 Wednesday 22 rain in 8 of 20 yrs 8/20 27° 21° September 23 Thursday 23 rain in 7 of 20 yrs 7/20 27° 21° September 24 Friday 24 rain in 4 of 20 yrs 4/20 27° 21° September 25 Saturday 25 rain in 3 of 20 yrs 3/20 28° 22° 19-25 rain on 26% of days 27° 22°
September 26 Sunday 26 rain in 3 of 20 yrs 3/20 28° 22° September 27 Monday 27 rain in 0 of 20 yrs 0/20 28° 22° September 28 Tuesday 28 rain in 4 of 20 yrs 4/20 27° 22° September 29 Wednesday 29 rain in 8 of 20 yrs 8/20 26° 21° September 30 Thursday 30 rain in 7 of 20 yrs 7/20 26° 21°
26-30 rain on 22% of days 27° 21°
1-4 rain on 39% of days 30° 24° 5-11 rain on 24% of days 29° 23° 12-18 rain on 36% of days 28° 23° 19-25 rain on 26% of days 27° 22° 26-30 rain on 22% of days 27° 21°
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
September 1 Friday 1 rain in 7 of 20 yrs 7/20 30° 24° September 2 Saturday 2 rain in 9 of 20 yrs 9/20 30° 24° 1-2 rain on 40% of days 30° 24°
September 3 Sunday 3 rain in 9 of 20 yrs 9/20 30° 24° September 4 Monday 4 rain in 6 of 20 yrs 6/20 30° 24° September 5 Tuesday 5 rain in 6 of 20 yrs 6/20 30° 24° September 6 Wednesday 6 rain in 5 of 20 yrs 5/20 30° 24° September 7 Thursday 7 rain in 5 of 20 yrs 5/20 30° 23° September 8 Friday 8 rain in 0 of 20 yrs 0/20 30° 23° September 9 Saturday 9 rain in 6 of 20 yrs 6/20 29° 23° 3-9 rain on 26% of days 30° 24°
September 10 Sunday 10 rain in 3 of 20 yrs 3/20 29° 23° September 11 Monday 11 rain in 8 of 20 yrs 8/20 29° 23° September 12 Tuesday 12 rain in 7 of 20 yrs 7/20 29° 23° September 13 Wednesday 13 rain in 8 of 20 yrs 8/20 29° 23° September 14 Thursday 14 rain in 9 of 20 yrs 9/20 28° 23° September 15 Friday 15 rain in 8 of 20 yrs 8/20 28° 23° September 16 Saturday 16 rain in 8 of 20 yrs 8/20 29° 23° 10-16 rain on 36% of days 29° 23°
September 17 Sunday 17 rain in 5 of 20 yrs 5/20 29° 22° September 18 Monday 18 rain in 5 of 20 yrs 5/20 28° 22° September 19 Tuesday 19 rain in 3 of 20 yrs 3/20 29° 22° September 20 Wednesday 20 rain in 5 of 20 yrs 5/20 28° 22° September 21 Thursday 21 rain in 6 of 20 yrs 6/20 27° 22° September 22 Friday 22 rain in 8 of 20 yrs 8/20 27° 21° September 23 Saturday 23 rain in 7 of 20 yrs 7/20 27° 21° 17-23 rain on 28% of days 28° 22°
September 24 Sunday 24 rain in 4 of 20 yrs 4/20 27° 21° September 25 Monday 25 rain in 3 of 20 yrs 3/20 28° 22° September 26 Tuesday 26 rain in 3 of 20 yrs 3/20 28° 22° September 27 Wednesday 27 rain in 0 of 20 yrs 0/20 28° 22° September 28 Thursday 28 rain in 4 of 20 yrs 4/20 27° 22° September 29 Friday 29 rain in 8 of 20 yrs 8/20 26° 21° September 30 Saturday 30 rain in 7 of 20 yrs 7/20 26° 21° 24-30 rain on 21% of days 27° 21°
1-2 rain on 40% of days 30° 24° 3-9 rain on 26% of days 30° 24° 10-16 rain on 36% of days 29° 23° 17-23 rain on 28% of days 28° 22° 24-30 rain on 21% of days 27° 21°
Tap another date to change
2006 none
2007 1mm
2008 none
2009 none
2010 10mm
2011 none
2012 none
2013 none
2014 11mm
2015 1mm
2016 none
2017 none
2018 none
2019 93mm
2020 5mm
2021 17mm
2022 9mm
2023 none
2024 none
2025 3mm
Holidays in September (2027) September 15 Mid-Autumn Festival *September 6 Labor Day * Provisional: not yet officially announced.
1 Local public holiday or break (busier, pricier)1 US holidays (flights fill up)
Day by day temperature i 18° 25° 31° 38° 1 8 15 22 29 30
Your trip dates, the past 20 years Trip dates September 1 (Wed) 2 (Thu) 3 (Fri) 4 (Sat) 5 (Sun) 6 (Mon) 7 (Tue) 8 (Wed) 9 (Thu) 10 (Fri) 11 (Sat) 12 (Sun) 13 (Mon) 14 (Tue) 15 (Wed) 16 (Thu) 17 (Fri) 18 (Sat) 19 (Sun) 20 (Mon) 21 (Tue) 22 (Wed) 23 (Thu) 24 (Fri) 25 (Sat) 26 (Sun) 27 (Mon) 28 (Tue) 29 (Wed) 30 (Thu) ~ September 1 (Wed) 2 (Thu) 3 (Fri) 4 (Sat) 5 (Sun) 6 (Mon) 7 (Tue) 8 (Wed) 9 (Thu) 10 (Fri) 11 (Sat) 12 (Sun) 13 (Mon) 14 (Tue) 15 (Wed) 16 (Thu) 17 (Fri) 18 (Sat) 19 (Sun) 20 (Mon) 21 (Tue) 22 (Wed) 23 (Thu) 24 (Fri) 25 (Sat) 26 (Sun) 27 (Mon) 28 (Tue) 29 (Wed) 30 (Thu) 1-7 8-14 15-21 22-end Whole month
You can also click two dates on the axis. Hover a cell to see that day's rain. By year Driest trips first
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Trip rain days Month rain days Tap a date to start, tap another to end. Each cell is that date in one year. '06 '07 '08 '09 '10 '11 '12 '13 '14 '15 '16 '17 '18 '19 '20 '21 '22 '23 '24 '25
of 20 10 Fri Pick September 10
3 11 Sat Pick September 11
8 12 Sun Pick September 12
7 13 Mon Pick September 13
8 14 Tue Pick September 14
9 15 Wed Pick September 15
8 16 Thu Pick September 16
8 17 Fri Pick September 17
5 18 Sat Pick September 18
5 19 Sun Pick September 19
3 20 Mon Pick September 20
5 21 Tue Pick September 21
6 22 Wed Pick September 22
8 23 Thu Pick September 23
7 24 Fri Pick September 24
4 25 Sat Pick September 25
3 26 Sun Pick September 26
3 27 Mon Pick September 27
0 28 Tue Pick September 28
4 29 Wed Pick September 29
8 30 Thu Pick September 30
7 Dates outside your trip are dimmed.
One row per year, one cell per day. 2011 had 3 rain days, 2025 had 14.
Shanghai through the year What to pack Loose linen or quick-dry cotton, a wide-brimmed hat and sunscreen were the basics. A water bottle stayed in the bag, and midday plans moved indoors.
Rain was occasional. A compact umbrella in the bag is enough.
Common questions Does it rain a lot in Shanghai in September? Over the past 20 years September averaged 9 rain days (1 mm or more) out of 30. Individual years ran from 3 in the driest to 14 in the wettest.
What should I wear in Shanghai in September? Days averaged 28°C and nights 23°C. Pack a compact umbrella, T-shirts, sunscreen plus a hat, and insect repellent.
Is September a good time to visit Shanghai? On warmth and rain days alone, Shanghai's easiest months were May and October. September ranked 4 of 12.
Is Shanghai humid in September? Mean relative humidity was 79%, with about 20 muggy days (dew point of 20°C or more) in the month.
Previous month Shanghai in August Next month Shanghai in October Whole year Shanghai weather by month Where to go September By country China: all cities this month Compare Compare with Beijing