Weather in Hong Kong in July

How July compares

July is the 1st warmest month of the year in Hong Kong and ranks 41st of 134 destinations we compare for July - see where else is hot in July. Against London's average high of 21.8°C in July, Hong Kong is 8.1°C warmer by day and 12.9°C warmer at night.

Daytime and night-time in July

The typical July day in Hong Kong peaks at 29.9°C, but that is an average: the warmest 10% of days reach 31.5°C or more. About 100% of days top 25°C and 1 in 2 pass 30°C. Nights average 26.4°C; one night in ten drops to 25.3°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest July day here reached 34.6°C (2004-07-01) and the coldest night 22.8°C (1992-07-08).

Rain in July

Wet (more than 8 rainy days): about 23 days with 1 mm or more, 253 mm in total. Year to year it varies a lot - the wettest July was 2001 with 435 mm, the driest 2007 with 81 mm. Humidity averages 87%, which makes the heat feel heavier than the thermometer suggests.

Sea temperature in July

The sea averages 28.4°C - warm enough to swim (22°c+). Depending on the year it ranges from 27.9°C to 29.0°C. For the warmest sea here, come in August (28.5°C).

Sunshine and daylight

Around 3.3 hours of sunshine a day (estimated from cloud cover), 13.2 hours of daylight: the sun rises about 05:48 and sets about 19:10 local time in mid-July. Average cloud cover is 75%.

Is July a good time to visit Hong Kong?

It is a reasonable choice: hot days but expect showers. The best months for Hong Kong on our scoring are November, October, September; months averaging 25°C or more: Apr, May, Jun, Jul, Aug, Sep, Oct.

Expect persistent heat, not much evening relief

July is Hong Kong's warmest month, and humidity of 87% adds to the challenge of spending time outdoors. Temperatures reach 30°C on 50% of days, so plan for heat rather than hoping for a cooler spell. Loose, lightweight clothing and regular indoor breaks are sensible, particularly around midday. Keep outdoor plans manageable and leave yourself the option to rest rather than filling every day with walking. Evenings are not a reliable cool-down: the average night low is 26.4°C. If you struggle to sleep in warm conditions, effective air conditioning should be a priority when choosing accommodation.

Build flexibility into outdoor plans

Frequent rain is the main catch, especially if you want to spend much of the holiday outside. Carry a compact umbrella or lightweight waterproof, and choose footwear you can tolerate getting wet. There are about 3.3 hours of sunshine within 13.2 hours of daylight, so long days should not be mistaken for reliably sunny ones. Keep indoor alternatives ready and move outdoor plans to suit the forecast rather than assigning them rigidly in advance. July can still work if you accept weather interruptions, but it is less suited to travellers who want to leave their accommodation each morning without thinking about rain.