September weather forecast
Petaling Jaya, Malaysia

As Petaling Jaya transitions to September, a slight dip in average monthly temperatures from 23.5°C to 32.2°C is observed. However, this doesn't disturb the uniformity of weather that the city has been experiencing over the past few months. Though the city's skyline often remains cloudy, ample daylight brightens up the surroundings. Typically, September keeps up with the consistency of the monsoon season. October forecasts an increase in rainfall, raising the total to 169mm.

Temperature

September's weather records an average high-temperature of a still hot 32.2°C, showing little deviation from August. Petaling Jaya, in the month of September, anticipates a consistent average low-temperature of 23.5°C.

Heat index

Throughout September, the heat index is calculated to be a blisteringly hot 42°C. Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.
In the scope of the heat index, its values resonate with shade and light wind conditions. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is the result of factoring in humidity to the air temperature, indicating perceived warmth. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. 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 highly critical to babies and toddlers. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

August and September, with an average relative humidity of 73%, are the least humid months.

Rainfall

In Petaling Jaya, Malaysia, in September, it is raining for 26.6 days, with typically 88mm of accumulated precipitation. In Petaling Jaya, during the entire year, the rain falls for 309.8 days and collects up to 1481mm of precipitation.

Daylight

The average length of the day in September is 12h and 8min.
On the first day of the month, sunrise is at 7:08 am and sunset at 7:19 pm. On the last day of September, in Petaling Jaya, sunrise is at 7:00 am and sunset at 7:06 pm +08.

Sunshine

The average sunshine in September in Petaling Jaya is 8.7h.

UV index

February through October and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The UV index of 7 during September translates into the following guidance:
Inhibit overexposure. Warding off sun damage is of utmost importance. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.