Climate averages 1991–2020
Kwai Chung weather
in September.
A hot, very wet month: the 4th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Kwai Chung: daytime highs average 29.2°C and nights cool to about 24.6°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 214 mm of rain on roughly 16 days, which makes September a very 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 Sha Tin (5 km away). In September its highs average 28.8°C, about as warm as Kwai Chung, with 203 mm of rain.
Among the 6 cities listed in Hong Kong, Kwai Chung ranks 4th of 6 for the warmest September highs and joint 5th of 6 for the driest September (rainfall, lowest first). The mean September high of those 6 cities is 29.3°C; Kwai Chung is level with that mean.
From September to October, average highs fall by 2.0°C to 27.2°C, and monthly rainfall falls from 214 mm to 75 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
Kwai Chung climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 18.9°C12.8°C | 12.8°C | 29 | 5.0 | 10.911 h |
| February | 20.1°C14.4°C | 14.4°C | 44 | 8.2 | 11.411 h |
| March | 22.8°C17.2°C | 17.2°C | 69 | 10.4 | 12.012 h |
| April | 25.7°C20.5°C | 20.5°C | 116 | 12.6 | 12.713 h |
| May | 28.0°C23.5°C | 23.5°C | 210 | 17.3 | 13.213 h |
| June | 29.3°C25.4°C | 25.4°C | 308 | 21.5 | 13.513 h |
| July | 30.0°C25.9°C | 25.9°C | 248 | 20.4 | 13.413 h |
| August | 30.0°C25.7°C | 25.7°C | 307 | 21.9 | 12.913 h |
| September, selected | 29.2°C24.6°C | 24.6°C | 214 | 16.2 | 12.312 h |
| October | 27.2°C22.0°C | 22.0°C | 75 | 6.6 | 11.612 h |
| November | 24.1°C18.4°C | 18.4°C | 39 | 5.1 | 11.111 h |
| December | 20.0°C13.9°C | 13.9°C | 34 | 4.5 | 10.811 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
- Sha Tin in SeptemberHong Kong · 5 kmHigh 28.8°C · Low 24.7°C · 203 mm rain
- Tai Po in SeptemberHong Kong · 10 kmHigh 29.6°C · Low 25.0°C · 203 mm rain
- Hong Kong in SeptemberHong Kong · 11 kmHigh 28.9°C · Low 25.0°C · 214 mm rain
- Tuen Mun in SeptemberHong Kong · 17 kmHigh 29.7°C · Low 24.9°C · 199 mm rain
- Shenzhen in SeptemberChina · 21 kmHigh 29.9°C · Low 25.0°C · 199 mm rain
- San Tung Chung Hang in SeptemberHong Kong · 22 kmHigh 29.3°C · Low 25.4°C · 204 mm rain
- Bao'an Centre in SeptemberChina · 33 kmHigh 29.6°C · Low 24.9°C · 199 mm rain
- Longgang in SeptemberChina · 41 kmHigh 29.5°C · Low 24.6°C · 203 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 Kwai Chung) is explained once on the Kwai Chung year overview and on the Sources, method and limits page.
Hong Kong lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.