May weather forecast
Happy Valley, Hong Kong

May in Happy Valley shows a clear sign of the hot weather setting in, with temperatures soaring both during the day and night. The sky paints a beautiful picture, with the near-perfect visibility of 9 kilometers. The setting sun gives gravity to the city's radiant appeal. In the advance towards June, the rainfall amount peaks. Importantly, in May, there's a significant growth in relative humidity, reaching a high of 84%.

Temperature

The shift into May in Happy Valley is accompanied by a modest temperature increase, with the average high-temperature edging up from 24.5°C (76.1°F) in April to a still moderately hot 27.7°C (81.9°F). Throughout May, Happy Valley's nights experience a slight temperature dip to a still moderately hot 24.9°C (76.8°F).

Heat index

The heat index for May is appraised at a tropical 32°C (89.6°F). If exposure and activity are sustained, they might cause a feeling of weariness, resulting in heat cramps.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', offers an insight into how hot it feels when we factor in moisture content. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly meaningful for babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.

Humidity

The most humid month in Happy Valley, Hong Kong, is May, with an average relative humidity of 84%.

Rainfall

In Happy Valley, in May, it is raining for 22.9 days, with typically 171mm (6.73") of accumulated precipitation. In Happy Valley, during the entire year, the rain falls for 224.5 days and collects up to 1264mm (49.76") of precipitation.

Daylight

In May, the average length of the day is 13h and 13min.
On the first day of the month, sunrise is at 05:50 and sunset at 18:49. On the last day of May, in Happy Valley, sunrise is at 05:38 and sunset at 19:03 HKT.

Sunshine

In May, the average sunshine in Happy Valley is 8.4h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Happy Valley. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum UV index of 7 in May translates into the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat.