Climate averages 1991–2020
Xi’an weather
in September.
A warm, 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 Xi’an: daytime highs average 24.6°C and nights cool to about 16.0°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 133 mm of rain on roughly 12 days, which makes September a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 25 min on an average September day.
The nearest other city in this atlas is Xianyang (23 km away). In September its highs average 24.5°C, about as warm as Xi’an, with 144 mm of rain.
Among the 884 cities listed in China, Xi’an ranks joint 614th of 884 for the warmest September highs and joint 709th of 884 for the driest September (rainfall, lowest first). The mean September high of those 884 cities is 25.7°C; Xi’an is 1.1°C cooler than that mean.
From September to October, average highs fall by 5.6°C to 19.0°C, and monthly rainfall falls from 133 mm to 81 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
Xi’an climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.8°C-3.6°C | -3.6°C | 13 | 3.2 | 10.110 h |
| February | 9.6°C-1.0°C | -1.0°C | 18 | 4.2 | 10.911 h |
| March | 15.3°C3.7°C | 3.7°C | 33 | 6.0 | 11.912 h |
| April | 21.7°C9.3°C | 9.3°C | 46 | 7.0 | 13.013 h |
| May | 26.2°C14.2°C | 14.2°C | 71 | 8.2 | 13.914 h |
| June | 30.2°C18.8°C | 18.8°C | 93 | 7.3 | 14.414 h |
| July | 31.2°C21.6°C | 21.6°C | 144 | 10.7 | 14.214 h |
| August | 29.8°C20.8°C | 20.8°C | 129 | 10.6 | 13.413 h |
| September, selected | 24.6°C16.0°C | 16.0°C | 133 | 11.7 | 12.412 h |
| October | 19.0°C10.1°C | 10.1°C | 81 | 10.0 | 11.411 h |
| November | 13.0°C3.4°C | 3.4°C | 40 | 6.6 | 10.410 h |
| December | 7.3°C-2.2°C | -2.2°C | 13 | 3.3 | 9.910 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
- Xianyang in SeptemberChina · 23 kmHigh 24.5°C · Low 16.1°C · 144 mm rain
- Lintong in SeptemberChina · 29 kmHigh 26.0°C · Low 16.6°C · 90 mm rain
- Weinan in SeptemberChina · 60 kmHigh 26.2°C · Low 16.9°C · 95 mm rain
- Tongchuan in SeptemberChina · 71 kmHigh 23.6°C · Low 15.2°C · 103 mm rain
- Tongchuanshi in SeptemberChina · 92 kmHigh 23.4°C · Low 15.2°C · 103 mm rain
- Shangluo in SeptemberChina · 102 kmHigh 23.0°C · Low 15.3°C · 116 mm rain
- Huayin in SeptemberChina · 110 kmHigh 26.2°C · Low 17.4°C · 144 mm rain
- Guozhen in SeptemberChina · 145 kmHigh 23.9°C · Low 15.6°C · 176 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 Xi’an) is explained once on the Xi’an year overview and on the Sources, method and limits page.