Climate averages 1991–2020
Changsha weather
in September.
A hot, moderately wet month: the 4th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Changsha: daytime highs average 28.8°C and nights cool to about 21.2°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 85 mm of rain on roughly 10 days, which makes September a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 21 min on an average September day.
The nearest other city in this atlas is Xiangtan (39 km away). In September its highs average 29.0°C, about as warm as Changsha, with 89 mm of rain.
Among the 884 cities listed in China, Changsha ranks joint 151st of 884 for the warmest September highs and joint 432nd of 884 for the driest September (rainfall, lowest first). The mean September high of those 884 cities is 25.7°C; Changsha is 3.1°C warmer than that mean.
From September to October, average highs fall by 5.0°C to 23.8°C, and monthly rainfall falls from 85 mm to 64 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
Changsha climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.7°C2.7°C | 2.7°C | 74 | 10.8 | 10.611 h |
| February | 12.4°C4.9°C | 4.9°C | 95 | 12.3 | 11.211 h |
| March | 16.5°C8.6°C | 8.6°C | 180 | 17.1 | 12.012 h |
| April | 22.4°C14.1°C | 14.1°C | 236 | 16.7 | 12.813 h |
| May | 26.6°C18.7°C | 18.7°C | 275 | 16.8 | 13.514 h |
| June | 29.3°C22.6°C | 22.6°C | 299 | 17.3 | 13.914 h |
| July | 32.7°C25.8°C | 25.8°C | 181 | 12.8 | 13.714 h |
| August | 32.4°C25.3°C | 25.3°C | 127 | 13.4 | 13.113 h |
| September, selected | 28.8°C21.2°C | 21.2°C | 85 | 9.5 | 12.412 h |
| October | 23.8°C15.8°C | 15.8°C | 64 | 8.0 | 11.512 h |
| November | 17.8°C9.8°C | 9.8°C | 75 | 9.0 | 10.811 h |
| December | 12.1°C4.4°C | 4.4°C | 53 | 7.9 | 10.410 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
- Xiangtan in SeptemberChina · 39 kmHigh 29.0°C · Low 21.4°C · 89 mm rain
- Zhuzhou in SeptemberChina · 44 kmHigh 29.2°C · Low 21.6°C · 85 mm rain
- Shaoshan in SeptemberChina · 54 kmHigh 28.3°C · Low 20.8°C · 81 mm rain
- Guankou in SeptemberChina · 64 kmHigh 29.3°C · Low 21.3°C · 86 mm rain
- Xiangxiang in SeptemberChina · 67 kmHigh 28.8°C · Low 21.3°C · 87 mm rain
- Heshan in SeptemberChina · 74 kmHigh 27.7°C · Low 20.8°C · 92 mm rain
- Xishan in SeptemberChina · 79 kmHigh 29.4°C · Low 21.6°C · 82 mm rain
- Pingxiang in SeptemberChina · 108 kmHigh 28.7°C · Low 21.1°C · 97 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 Changsha) is explained once on the Changsha year overview and on the Sources, method and limits page.