Hong Kong
Hong Kong
Long term weather forecast
Long term weather forecast

September weather forecast and Climate
Hong Kong, Hong Kong

  • Average high temperature in September: 86.2°F

Warmest month (with highest average high temperature) is July (88.5°F).
Month with lowest average high temperature is January (65.5°F).

  • Average low temperature in September: 78.4°F

Month with highest average low temperature is July (80.2°F).
Coldest month (with lowest average low temperature) is January (58.1°F).

  • Average humidity in September: 78%

Months with highest relative humidity are April and May (83%).
Month with lowest relative humidity is December (69%).

  • Average rainfall in September: 12.9"

Wettest month (with highest rainfall) is June (18").
Driest month (with lowest rainfall) is January (1").

  • Average rainfall days in September: 14.7 days

Month with highest number of rainy days is June (19.1 days).
Month with lowest number of rainy days is December (4.5 days).

  • Average sea temperature in September: 82.9°F

Best month for swimming (with highest average sea temperature) is July (84.4°F).
Coldest month (with lowest average sea temperature) is February (66°F).

  • Average daylight in September: 12h

Months with longest days are April, May, June, July and August (Average daylight: 13h).
Months with shortest days are January, February, November and December (Average daylight: 11h).

  • Average sunshine in September: 5.7h

Month with most sunshine is July (Average sunshine: 6.8h).
Month with least sunshine is March (Average sunshine: 2.9h).

  • Average UV index in September: 11

Months with highest UV index are April, May, June, July and August (UV index 12).
Months with lowest UV index are January, November and December (UV index 7).