Climate averages 1991–2020
Sanmenxia weather
in September.
A warm, wet month: the 5th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Sanmenxia: daytime highs average 25.0°C and nights cool to about 16.4°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 103 mm of rain on roughly 10 days, which makes September a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 26 min on an average September day.
The nearest other city in this atlas is Yuncheng (33 km away). In September its highs average 26.0°C, 0.9°C warmer than Sanmenxia, with 81 mm of rain.
Among the 884 cities listed in China, Sanmenxia ranks joint 597th of 884 for the warmest September highs and joint 576th of 884 for the driest September (rainfall, lowest first). The mean September high of those 884 cities is 25.7°C; Sanmenxia is 0.7°C cooler than that mean.
From September to October, average highs fall by 5.4°C to 19.6°C, and monthly rainfall falls from 103 mm to 57 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
Sanmenxia climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.0°C-3.9°C | -3.9°C | 9.7 | 2.8 | 10.110 h |
| February | 8.9°C-1.1°C | -1.1°C | 16 | 3.6 | 10.911 h |
| March | 15.2°C3.8°C | 3.8°C | 25 | 5.4 | 11.912 h |
| April | 22.0°C9.8°C | 9.8°C | 41 | 6.0 | 13.013 h |
| May | 26.8°C15.1°C | 15.1°C | 55 | 7.0 | 14.014 h |
| June | 30.9°C19.7°C | 19.7°C | 75 | 7.6 | 14.414 h |
| July | 31.2°C22.3°C | 22.3°C | 126 | 12.5 | 14.214 h |
| August | 29.5°C21.2°C | 21.2°C | 112 | 11.5 | 13.513 h |
| September, selected | 25.0°C16.4°C | 16.4°C | 103 | 9.7 | 12.412 h |
| October | 19.6°C10.6°C | 10.6°C | 57 | 7.0 | 11.311 h |
| November | 12.6°C3.6°C | 3.6°C | 31 | 5.4 | 10.410 h |
| December | 6.2°C-2.3°C | -2.3°C | 9.2 | 2.5 | 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
- Yuncheng in SeptemberChina · 33 kmHigh 26.0°C · Low 17.2°C · 81 mm rain
- Yima in SeptemberChina · 63 kmHigh 24.3°C · Low 15.7°C · 104 mm rain
- Changzhi (Shanxi, 35.21°N 111.74°E), China in SeptemberChina · 69 kmHigh 24.8°C · Low 16.4°C · 86 mm rain
- Yongji in SeptemberChina · 69 kmHigh 26.1°C · Low 17.2°C · 106 mm rain
- Hancheng in SeptemberChina · 103 kmHigh 24.9°C · Low 16.2°C · 93 mm rain
- Huayin in SeptemberChina · 106 kmHigh 26.2°C · Low 17.4°C · 144 mm rain
- Luoyang in SeptemberChina · 114 kmHigh 26.4°C · Low 17.2°C · 95 mm rain
- Jiyuan in SeptemberChina · 132 kmHigh 26.1°C · Low 16.8°C · 91 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 Sanmenxia) is explained once on the Sanmenxia year overview and on the Sources, method and limits page.