Hong Kong weather in September
September is a fair month to visit Hong Kong: highs of 30°C (86°F) and about 161 mm (6.3 in) of rain on average. Nights average 26°C (78°F) and cloud cover 63% (NASA POWER, 2001–2025 averages). The sea averages 29°C (84°F). It is the 5th wettest month of the year and the 3rd warmest. Compared with August, it is about as warm and drier; October brings highs of 28°C (82°F) and 49 mm (1.9 in) of rain.
Is September a good time to visit Hong Kong?
fair month Weather score 61/100.
September is a fair month in Hong Kong. The weather is usually best in Oct–Mar.
Does it rain a lot in Hong Kong in September?
Yes, it is one of the rainy months: about 161 mm (6.3 in) falls in an average September. It is the 5th wettest month of the year.
How warm is Hong Kong in September?
Days average 30°C (86°F) and nights 26°C (78°F).
Hong Kong weather by month
| Month | High | Low | Rain | Cloud | Sea | Weather |
|---|---|---|---|---|---|---|
| January | 20°C (67°F) | 12°C (54°F) | 36 mm | 63% | 18°C (65°F) | best |
| February | 21°C (70°F) | 15°C (58°F) | 29 mm | 72% | 19°C (65°F) | best |
| March | 23°C (74°F) | 17°C (63°F) | 72 mm | 76% | 20°C (68°F) | best |
| April | 26°C (79°F) | 21°C (69°F) | 104 mm | 74% | 24°C (75°F) | fair |
| May | 29°C (83°F) | 24°C (75°F) | 210 mm | 76% | 27°C (80°F) | least pleasant |
| June | 30°C (85°F) | 26°C (79°F) | 282 mm | 79% | 28°C (83°F) | least pleasant |
| July | 30°C (86°F) | 27°C (80°F) | 185 mm | 70% | 29°C (84°F) | fair |
| August | 30°C (86°F) | 27°C (80°F) | 218 mm | 71% | 28°C (83°F) | least pleasant |
| September | 30°C (86°F) | 26°C (78°F) | 161 mm | 63% | 29°C (84°F) | fair |
| October | 28°C (82°F) | 22°C (72°F) | 49 mm | 53% | 28°C (82°F) | best |
| November | 25°C (77°F) | 18°C (65°F) | 30 mm | 58% | 24°C (76°F) | best |
| December | 21°C (69°F) | 13°C (56°F) | 25 mm | 58% | 21°C (69°F) | best |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine. Page updated . How we rate months