Climate averages 1991–2020
Heshan 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 Heshan: daytime highs average 27.7°C and nights cool to about 20.8°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 92 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 21 min on an average September day.
The nearest other city in this atlas is Changsha (74 km away). In September its highs average 28.8°C, 1.1°C warmer than Heshan, with 85 mm of rain.
Among the 884 cities listed in China, Heshan ranks joint 227th of 884 for the warmest September highs and joint 517th of 884 for the driest September (rainfall, lowest first). The mean September high of those 884 cities is 25.7°C; Heshan is 2.0°C warmer than that mean.
From September to October, average highs fall by 5.0°C to 22.7°C, and monthly rainfall falls from 92 mm to 75 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
Heshan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.0°C2.2°C | 2.2°C | 75 | 11.1 | 10.511 h |
| February | 11.7°C4.4°C | 4.4°C | 88 | 11.9 | 11.211 h |
| March | 16.1°C8.2°C | 8.2°C | 156 | 15.8 | 12.012 h |
| April | 22.0°C13.8°C | 13.8°C | 183 | 16.1 | 12.813 h |
| May | 26.2°C18.4°C | 18.4°C | 225 | 15.5 | 13.614 h |
| June | 29.0°C22.5°C | 22.5°C | 295 | 16.7 | 13.914 h |
| July | 32.0°C25.6°C | 25.6°C | 216 | 15.2 | 13.814 h |
| August | 31.5°C25.0°C | 25.0°C | 154 | 15.0 | 13.213 h |
| September, selected | 27.7°C20.8°C | 20.8°C | 92 | 10.2 | 12.412 h |
| October | 22.7°C15.3°C | 15.3°C | 75 | 8.7 | 11.512 h |
| November | 17.0°C9.6°C | 9.6°C | 76 | 9.3 | 10.811 h |
| December | 11.4°C4.2°C | 4.2°C | 51 | 8.3 | 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
- Changsha in SeptemberChina · 74 kmHigh 28.8°C · Low 21.2°C · 85 mm rain
- Shaoshan in SeptemberChina · 74 kmHigh 28.3°C · Low 20.8°C · 81 mm rain
- Changde in SeptemberChina · 82 kmHigh 27.9°C · Low 20.7°C · 86 mm rain
- Xiangxiang in SeptemberChina · 95 kmHigh 28.8°C · Low 21.3°C · 87 mm rain
- Xiangtan in SeptemberChina · 97 kmHigh 29.0°C · Low 21.4°C · 89 mm rain
- Loudi in SeptemberChina · 99 kmHigh 28.1°C · Low 20.5°C · 76 mm rain
- Zhuzhou in SeptemberChina · 114 kmHigh 29.2°C · Low 21.6°C · 85 mm rain
- Yueyang in SeptemberChina · 115 kmHigh 28.2°C · Low 21.2°C · 89 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 Heshan) is explained once on the Heshan year overview and on the Sources, method and limits page.