May weather forecast
Petaling Jaya, Malaysia

May experiences a slight rise in temperatures in Petaling Jaya, making the afternoon quite warm. This is still accompanied by rain showers, keeping the urban heat at bay. Though the month gets fair sunlight, the overcast sky can often reduce visibility. Its natives, accustomed to this weather pattern, continue with their day-to-day routine undeterred by frequent showers. The onset of June brings with it a slight dip in temperature and reduced rainfall.

Temperature

During February, April through June, Petaling Jaya experiences its warmest period, with an average high-temperature of 32.4°C (90.3°F).

Heat index

During May, the heat index is calculated to be a life-threatening hot 45°C (113°F). Prudent: Heat cramps and heat exhaustion are likely. Heatstroke becomes imminent with sustained exertion.
Understand that the heat index values take into account shaded locations and mild winds. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The average relative humidity in May is 78%.

Rainfall

In Petaling Jaya, in May, it is raining for 29.2 days, with typically 144mm (5.67") of accumulated precipitation. Throughout the year, there are 309.8 rainfall days, and 1481mm (58.31") of precipitation is accumulated.

Daylight

In Petaling Jaya, the average length of the day in May is 12h and 16min.
On the first day of May, sunrise is at 7:03 am and sunset at 7:17 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 7:20 pm +08.

Sunshine

In Petaling Jaya, the average sunshine in May is 8.5h.

UV index

The months with the highest UV index are February through October and December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: In May, the average maximum UV index of 7 translates into the following recommendations:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.