Climate Insights for Hong Kong

The climate in Hong Kong is warm and mild. The average annual temperature is 24°C and approximately 1763mm of precipitation falls per year. August is the wettest month, receiving around 330mm of rainfall. Hong Kong is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, September. The coldest months are January, December, February, when temperatures can drop to 15°C.

Hong Kong sees moderate temperature variation throughout the year, ranging from 15°C to 31°C. The warmest month is July, when average highs reach 31°C and the mean temperature sits around 29°C. January is the coolest month, with minimum temperatures around 15°C and an average of 17°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between November and December, with a 5°C shift in average temperatures.

Hong Kong is a fairly wet location, receiving approximately 1763mm of precipitation annually, which averages out to around 147mm per month. The wettest month is August, averaging 330mm of rainfall. June and September also tend to see above-average precipitation. The driest month is December, with just 22mm. That's 308mm less than August, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Hong Kong is mildly breezy, with an average annual wind speed of 20km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 22km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in September, with average winds dropping to 16km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 6km/h between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 21km/h in winter, 19km/h in spring, 18km/h in summer, 19km/h in autumn.

It is currently spring in Hong Kong, which began on March 20, 2026. Hong Kong is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 31°C, while the coldest stretch bottoms out in January near 15°C. Summer is next, beginning on June 21, 2026 — 90 days from now.

The best time to visit Hong Kong is during January, February, March, April, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 51mm per month. By contrast, July can be uncomfortably hot with temperatures reaching 31°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Hong Kong based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.