Climate averages 1991–2020
Kaiyuan (Yunnan), China weather
in September.
A warm, wet month: the 6th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Kaiyuan (Yunnan), China: daytime highs average 25.4°C and nights cool to about 17.9°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 91 mm of rain on roughly 14 days, which makes September a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 18 min on an average September day.
The nearest other city in this atlas is Mengzi (38 km away). In September its highs average 24.8°C, 0.6°C cooler than Kaiyuan (Yunnan), China, with 143 mm of rain.
Among the 884 cities listed in China, Kaiyuan (Yunnan), China ranks joint 574th of 884 for the warmest September highs and joint 506th of 884 for the driest September (rainfall, lowest first). The mean September high of those 884 cities is 25.7°C; Kaiyuan (Yunnan), China is 0.3°C cooler than that mean.
From September to October, average highs fall by 2.0°C to 23.3°C, and monthly rainfall falls from 91 mm to 45 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
Kaiyuan (Yunnan), China climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 18.3°C8.3°C | 8.3°C | 18 | 2.6 | 10.811 h |
| February | 21.2°C9.8°C | 9.8°C | 11 | 2.2 | 11.311 h |
| March | 25.2°C13.0°C | 13.0°C | 19 | 4.1 | 12.012 h |
| April | 27.6°C15.9°C | 15.9°C | 30 | 6.0 | 12.713 h |
| May | 28.2°C18.2°C | 18.2°C | 76 | 9.9 | 13.313 h |
| June | 27.8°C19.8°C | 19.8°C | 120 | 15.7 | 13.614 h |
| July | 26.7°C19.6°C | 19.6°C | 160 | 19.4 | 13.413 h |
| August | 26.4°C19.1°C | 19.1°C | 149 | 19.6 | 13.013 h |
| September, selected | 25.4°C17.9°C | 17.9°C | 91 | 14.4 | 12.312 h |
| October | 23.3°C15.6°C | 15.6°C | 45 | 7.8 | 11.612 h |
| November | 21.0°C11.6°C | 11.6°C | 22 | 2.9 | 11.011 h |
| December | 18.1°C8.4°C | 8.4°C | 15 | 2.3 | 10.711 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
- Mengzi in SeptemberChina · 38 kmHigh 24.8°C · Low 17.9°C · 143 mm rain
- Gejiu in SeptemberChina · 40 kmHigh 22.8°C · Low 16.1°C · 135 mm rain
- Miyang in SeptemberChina · 80 kmHigh 24.4°C · Low 17.3°C · 95 mm rain
- Zhongshu in SeptemberChina · 102 kmHigh 22.5°C · Low 15.8°C · 117 mm rain
- Wenshan City in SeptemberChina · 103 kmHigh 24.5°C · Low 17.6°C · 125 mm rain
- Yuxi in SeptemberChina · 106 kmHigh 23.5°C · Low 16.6°C · 125 mm rain
- Haikou, China in SeptemberChina · 141 kmHigh 21.6°C · Low 15.9°C · 147 mm rain
- Lào Cai in SeptemberVietnam · 151 kmHigh 29.8°C · Low 23.5°C · 165 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 Kaiyuan) is explained once on the Kaiyuan (Yunnan), China year overview and on the Sources, method and limits page.