Climate averages 1991–2020
Chenggu weather
in September.
A warm, very wet month: the 5th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Chenggu: daytime highs average 23.0°C and nights cool to about 16.6°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 198 mm of rain on roughly 16 days, which makes September a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 24 min on an average September day.
The nearest other city in this atlas is Hanzhong (29 km away). In September its highs average 22.7°C, about as warm as Chenggu, with 170 mm of rain.
Among the 884 cities listed in China, Chenggu ranks joint 700th of 884 for the warmest September highs and 840th of 884 for the driest September (rainfall, lowest first). The mean September high of those 884 cities is 25.7°C; Chenggu is 2.7°C cooler than that mean.
From September to October, average highs fall by 4.8°C to 18.2°C, and monthly rainfall falls from 198 mm to 121 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
Chenggu climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.2°C-0.7°C | -0.7°C | 22 | 5.9 | 10.210 h |
| February | 9.8°C1.2°C | 1.2°C | 34 | 7.5 | 11.011 h |
| March | 14.4°C4.7°C | 4.7°C | 53 | 9.9 | 12.012 h |
| April | 20.0°C9.6°C | 9.6°C | 69 | 11.0 | 13.013 h |
| May | 23.6°C14.0°C | 14.0°C | 109 | 12.4 | 13.914 h |
| June | 26.9°C18.1°C | 18.1°C | 137 | 11.6 | 14.314 h |
| July | 28.5°C21.2°C | 21.2°C | 224 | 18.1 | 14.114 h |
| August | 27.8°C20.8°C | 20.8°C | 169 | 16.2 | 13.413 h |
| September, selected | 23.0°C16.6°C | 16.6°C | 198 | 15.7 | 12.412 h |
| October | 18.2°C11.4°C | 11.4°C | 121 | 14.2 | 11.411 h |
| November | 13.2°C5.6°C | 5.6°C | 68 | 10.1 | 10.510 h |
| December | 8.4°C0.5°C | 0.5°C | 27 | 6.2 | 10.010 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
- Hanzhong in SeptemberChina · 29 kmHigh 22.7°C · Low 16.5°C · 170 mm rain
- Xixiang in SeptemberChina · 45 kmHigh 24.8°C · Low 17.7°C · 175 mm rain
- Mianyang, China in SeptemberChina · 59 kmHigh 22.8°C · Low 17.0°C · 210 mm rain
- Guozhen in SeptemberChina · 135 kmHigh 23.9°C · Low 15.6°C · 176 mm rain
- Baoji in SeptemberChina · 136 kmHigh 23.8°C · Low 15.6°C · 176 mm rain
- Donghe in SeptemberChina · 140 kmHigh 24.9°C · Low 18.5°C · 217 mm rain
- Bazhong in SeptemberChina · 152 kmHigh 25.8°C · Low 19.1°C · 197 mm rain
- Guangyuan in SeptemberChina · 161 kmHigh 24.2°C · Low 17.7°C · 193 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 Chenggu) is explained once on the Chenggu year overview and on the Sources, method and limits page.