July weather forecast
Hong Kong, Hong Kong

The middle of the year in Hong Kong observes the peak of summer with July being one of the hottest months. Throughout the month, the city experiences an increased duration of daylight and high nocturnal temperatures. However, it isn’t all clear skies and sunshine. The considerable rainfall levels taper off slightly from June’s high but still amount to an impressive 377mm (14.84"). Amid the distinctly tropical climate, a pervasive humidity often envelops Hong Kong during this month.

Temperature

Hong Kong experiences its highest temperatures in July, with an average peak of 31.4°C (88.5°F) and a low of 26.8°C (80.2°F).

Heat index

The average heat index in July is calculated to be an extremely hot 43°C (109.4°F). Keep guard: Heat cramps and heat exhaustion are likely. Continued activity increases the risk of heatstroke.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

In Hong Kong, the average relative humidity in July is 81%.

Rainfall

In Hong Kong, during July, the rain falls for 17.6 days and regularly aggregates up to 377mm (14.84") of precipitation. Throughout the year, in Hong Kong, there are 137.8 rainfall days, and 2398mm (94.41") of precipitation is accumulated.

Sea temperature

With an average sea temperature of 29.1°C (84.4°F), July is the month with the warmest seawater in Hong Kong, Hong Kong.
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

The average length of the day in July in Hong Kong is 13h and 21min.
On the first day of July in Hong Kong, Hong Kong, sunrise is at 05:43 and sunset at 19:11. On the last day of the month, sunrise is at 05:55 and sunset at 19:04 HKT.

Sunshine

With an average of 6.8h of sunshine, July has the most sunshine of the year in Hong Kong.

UV index

April through August, with an average maximum UV index of 12, are months with the highest UV index in Hong Kong. A UV Index reading of 11, and higher, represents an ultimate health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: In July, the maximum UV index of 12 translates into these guidelines:
Adopt all essential precautions. Preventing sun harm is crucial. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Even when it's cloudy, ensure the generous application and frequent reapplication of a sunscreen with at least 30 SPF, particularly post swim or outdoor activity. Beware! Reflections from sand and water can intensify the Sun's UV radiation.