July weather forecast
Petaling Jaya, Malaysia

July, like June, is another hot summer month in Petaling Jaya, Malaysia, with an average temperature fluctuating between 23.8°C (74.8°F) and 32.3°C (90.1°F).

Temperature

In Petaling Jaya, the average high-temperature in July is essentially the same as in June - a still tropical 32.3°C (90.1°F). The average low-temperature, in July, is 23.8°C (74.8°F).

Heat index

In July, the average heat index is appraised at a blistering 43°C (109.4°F). Beware: Heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. 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 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, metabolic differences, wind). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Petaling Jaya, the average relative humidity in July is 74%.

Rainfall

In Petaling Jaya, it is raining for 26.6 days, with typically 103mm (4.06") of accumulated precipitation. Throughout the year, in Petaling Jaya, there are 309.8 rainfall days, and 1481mm (58.31") of precipitation is accumulated.

Daylight

The average length of the day in July in Petaling Jaya is 12h and 17min.
On the first day of July in Petaling Jaya, sunrise is at 7:08 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 7:27 pm +08.

Sunshine

In Petaling Jaya, the average sunshine in July is 8.7h.

UV index

The months with the highest UV index in Petaling Jaya, Malaysia, are February through October and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 7 in July transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.