Climate averages 1991–2020
Jiayuguan weather
in September.
A mild, fairly dry month: the 5th warmest and the 9th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Jiayuguan: daytime highs average 21.1°C and nights cool to about 10.3°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 18 mm of rain on roughly 4 days, which makes September a fairly dry month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 30 min on an average September day.
The nearest other city in this atlas is Jiuquan (21 km away). In September its highs average 21.1°C, about as warm as Jiayuguan, with 15 mm of rain.
Among the 884 cities listed in China, Jiayuguan ranks joint 784th of 884 for the warmest September highs and 18th of 884 for the driest September (rainfall, lowest first). The mean September high of those 884 cities is 25.7°C; Jiayuguan is 4.5°C cooler than that mean.
From September to October, average highs fall by 7.3°C to 13.8°C, and monthly rainfall falls from 18 mm to 6.5 mm.
The annual picture
September in context
Monthly precipitation
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
Jiayuguan climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -3.4°C-11.9°C | -11.9°C | 3.1 | 1.1 | 9.710 h |
| February | 1.4°C-8.3°C | -8.3°C | 3.2 | 1.1 | 10.711 h |
| March | 8.6°C-3.3°C | -3.3°C | 9.8 | 2.3 | 11.912 h |
| April | 16.5°C3.1°C | 3.1°C | 8.5 | 2.3 | 13.213 h |
| May | 21.8°C8.8°C | 8.8°C | 15 | 3.9 | 14.314 h |
| June | 26.3°C14.3°C | 14.3°C | 20 | 4.2 | 14.915 h |
| July | 28.1°C16.9°C | 16.9°C | 25 | 5.2 | 14.715 h |
| August | 26.5°C15.5°C | 15.5°C | 27 | 5.4 | 13.714 h |
| September, selected | 21.1°C10.3°C | 10.3°C | 18 | 3.5 | 12.512 h |
| October | 13.8°C3.0°C | 3.0°C | 6.5 | 1.8 | 11.211 h |
| November | 5.3°C-4.2°C | -4.2°C | 5.3 | 1.6 | 10.010 h |
| December | -1.8°C-10.2°C | -10.2°C | 3.7 | 1.4 | 9.49 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet 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
- Jiuquan in SeptemberChina · 21 kmHigh 21.1°C · Low 10.3°C · 15 mm rain
- Laojunmiao in SeptemberChina · 47 kmHigh 18.3°C · Low 8.3°C · 26 mm rain
- Zhangye in SeptemberChina · 210 kmHigh 22.2°C · Low 8.7°C · 23 mm rain
- Dunhuang in SeptemberChina · 309 kmHigh 27.4°C · Low 13.1°C · 2.5 mm rain
- Jinchang in SeptemberChina · 367 kmHigh 22.1°C · Low 11.0°C · 33 mm rain
- Wuwei in SeptemberChina · 431 kmHigh 21.3°C · Low 9.9°C · 37 mm rain
- Qiaotou in SeptemberChina · 435 kmHigh 16.4°C · Low 6.3°C · 122 mm rain
- Xining in SeptemberChina · 466 kmHigh 18.0°C · Low 8.5°C · 87 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 Jiayuguan) is explained once on the Jiayuguan year overview and on the Sources, method and limits page.