Climate averages 1991–2020
Hong Kong weather
in May.
A warm, very wet month: the 5th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Hong Kong: daytime highs average 27.6°C and nights cool to about 23.8°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 210 mm of rain on roughly 17 days, which makes May a very wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 12 min on an average May day.
The nearest other city in this atlas is Kwai Chung (11 km away). In May its highs average 28.0°C, about as warm as Hong Kong, with 210 mm of rain.
Among the 6 cities listed in Hong Kong, Hong Kong ranks 5th of 6 for the warmest May highs and joint 2nd of 6 for the driest May (rainfall, lowest first). The mean May high of those 6 cities is 28.0°C; Hong Kong is 0.4°C cooler than that mean.
From May to June, average highs rise by 1.4°C to 29.0°C, and monthly rainfall rises from 210 mm to 308 mm.
The annual picture
May 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
Hong Kong climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 18.5°C13.4°C | 13.4°C | 29 | 5.0 | 10.911 h |
| February | 19.6°C14.9°C | 14.9°C | 44 | 8.2 | 11.411 h |
| March | 22.2°C17.5°C | 17.5°C | 69 | 10.4 | 12.012 h |
| April | 25.1°C20.8°C | 20.8°C | 116 | 12.6 | 12.713 h |
| May, selected | 27.6°C23.8°C | 23.8°C | 210 | 17.3 | 13.213 h |
| June | 29.0°C25.7°C | 25.7°C | 308 | 21.5 | 13.513 h |
| July | 29.7°C26.2°C | 26.2°C | 248 | 20.4 | 13.413 h |
| August | 29.7°C25.9°C | 25.9°C | 307 | 21.9 | 12.913 h |
| September | 28.9°C25.0°C | 25.0°C | 214 | 16.2 | 12.312 h |
| October | 26.9°C22.6°C | 22.6°C | 75 | 6.6 | 11.712 h |
| November | 23.7°C19.0°C | 19.0°C | 39 | 5.1 | 11.111 h |
| December | 19.8°C14.6°C | 14.6°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
May in nearby cities
- Kwai Chung in MayHong Kong · 11 kmHigh 28.0°C · Low 23.5°C · 210 mm rain
- Sha Tin in MayHong Kong · 12 kmHigh 27.5°C · Low 23.5°C · 229 mm rain
- Tai Po in MayHong Kong · 19 kmHigh 28.4°C · Low 23.9°C · 229 mm rain
- San Tung Chung Hang in MayHong Kong · 24 kmHigh 27.9°C · Low 24.1°C · 209 mm rain
- Tuen Mun in MayHong Kong · 24 kmHigh 28.5°C · Low 23.8°C · 229 mm rain
- Shenzhen in MayChina · 32 kmHigh 28.8°C · Low 23.9°C · 229 mm rain
- Bao'an Centre in MayChina · 43 kmHigh 28.3°C · Low 23.8°C · 229 mm rain
- Longgang in MayChina · 50 kmHigh 28.1°C · Low 23.4°C · 271 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 Hong Kong) is explained once on the Hong Kong year overview and on the Sources, method and limits page.
Kwai Chung lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.