May weather forecast
Jiangmen, China

May signals the onset of the hot season in Jiangmen, with a significant shift from the more temperate weather in April. The temperature rise is accompanied by an increase in rainfall to about 80mm (3.15") over 17.4 days, making May one of the wetter months. As the mercury level rises to between 24.1°C (75.4°F) and 30.5°C (86.9°F), residents turn to indoor activities or shade-seeking during the peak afternoon hours. Humidity also peaks to an average of 80%, making the air feel substantially heavier. Despite the wind holding its strength and gusting at a peak of 13km/h (8.1mph), the extended daylight hours, reaching up to 13.2 hours, reveal a busy city life persisting under umbrellas, awnings, and skywalks.

Temperature

May's onset in Jiangmen brings a minor rise in the average high-temperature, moving from a warm 27.3°C (81.1°F) in April to a hot 30.5°C (86.9°F). In Jiangmen, May is marked by an average low-temperature of 24.1°C (75.4°F).

Heat index

The heat index value during May is computed to be a very hot 39°C (102.2°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

The most humid month in Jiangmen is May, with an average relative humidity of 80%.

Rainfall

In Jiangmen, during May, the rain falls for 17.4 days and regularly aggregates up to 80mm (3.15") of precipitation. Throughout the year, there are 170.3 rainfall days, and 500mm (19.69") of precipitation is accumulated.

Daylight

In Jiangmen, the average length of the day in May is 13h and 13min.
On the first day of May, sunrise is at 05:54 and sunset at 18:54. On the last day of the month, sunrise is at 05:42 and sunset at 19:08 CST.

Sunshine

In May, the average sunshine is 7.8h.

UV index

The months with the highest UV index in Jiangmen are May through August, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 7 during May translates into the following directions:
Deter overexposure. Protecting against the sun's effects is essential. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.