Climate averages 1991–2020
Hangzhou weather
in September.
A warm, wet month: the 4th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Hangzhou: daytime highs average 27.9°C and nights cool to about 20.7°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 98 mm of rain on roughly 10 days, which makes September a wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 22 min on an average September day.
The nearest other city in this atlas is Xiaoshan (17 km away). In September its highs average 28.0°C, about as warm as Hangzhou, with 98 mm of rain.
Among the 884 cities listed in China, Hangzhou ranks joint 209th of 884 for the warmest September highs and joint 557th of 884 for the driest September (rainfall, lowest first). The mean September high of those 884 cities is 25.7°C; Hangzhou is 2.2°C warmer than that mean.
From September to October, average highs fall by 4.8°C to 23.0°C, and monthly rainfall falls from 98 mm to 59 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Hangzhou climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.7°C1.1°C | 1.1°C | 80 | 10.3 | 10.410 h |
| February | 11.1°C2.8°C | 2.8°C | 74 | 10.0 | 11.111 h |
| March | 15.5°C6.5°C | 6.5°C | 119 | 13.5 | 12.012 h |
| April | 21.3°C11.7°C | 11.7°C | 131 | 12.1 | 12.913 h |
| May | 25.9°C16.9°C | 16.9°C | 156 | 12.2 | 13.714 h |
| June | 28.3°C21.1°C | 21.1°C | 303 | 16.2 | 14.114 h |
| July | 32.8°C25.3°C | 25.3°C | 173 | 12.9 | 13.914 h |
| August | 32.3°C25.1°C | 25.1°C | 140 | 14.8 | 13.213 h |
| September, selected | 27.9°C20.7°C | 20.7°C | 98 | 10.1 | 12.412 h |
| October | 23.0°C15.0°C | 15.0°C | 59 | 6.3 | 11.511 h |
| November | 17.4°C9.2°C | 9.2°C | 65 | 8.5 | 10.711 h |
| December | 11.2°C3.0°C | 3.0°C | 59 | 7.5 | 10.210 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Xiaoshan in SeptemberChina · 17 kmHigh 28.0°C · Low 21.0°C · 98 mm rain
- Linping in SeptemberChina · 19 kmHigh 27.9°C · Low 20.7°C · 98 mm rain
- Fuyang, China in SeptemberChina · 33 kmHigh 27.9°C · Low 21.0°C · 111 mm rain
- Deqing in SeptemberChina · 34 kmHigh 27.6°C · Low 20.4°C · 114 mm rain
- Chóngfú in SeptemberChina · 37 kmHigh 27.8°C · Low 20.9°C · 100 mm rain
- Shaoxing in SeptemberChina · 52 kmHigh 28.1°C · Low 21.0°C · 111 mm rain
- Haining in SeptemberChina · 57 kmHigh 27.3°C · Low 21.9°C · 109 mm rain
- Zhuji in SeptemberChina · 64 kmHigh 28.3°C · Low 20.9°C · 99 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Hangzhou) is explained once on the Hangzhou year overview and on the Sources, method and limits page.
Xiaoshan lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.