September weather forecast
Shah Alam, Malaysia

The unique feature for September in Shah Alam is the significant decrease in average rainfall to just 7mm (0.28"). The reduction of rain is also seen in the number of rainy days, which drop to a year-long low of 4.6 days. Even though the rainfall abates, September's other variables such as temperature, wind speed, daylight hours, and humidity remain consistent with August. Despite the decrease in rainfall, the percentage of cloud cover slightly increases in September, contributing to a consistent dusk period and a mildly cooler month overall.

Temperature

The transition into September shows a subtle variation to a still hot 32.6°C (90.7°F) from August's 33°C (91.4°F) in the average high-temperature. During September nights, Shah Alam records an average temperature of 24°C (75.2°F).

Heat index

The heat index in September is appraised at an extremely hot 43°C (109.4°F). Watchful: Heat cramps and heat exhaustion are predicted. Continued exertion could lead to heatstroke.
In reference to the heat index, it's for places in shade and with a slight wind. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too 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

August and September, with an average relative humidity of 71%, are the least humid months in Shah Alam, Malaysia.

Rainfall

September is the month with the least rainfall. Rain falls for 4.6 days and accumulates 7mm (0.28") of precipitation.

Daylight

The average length of the day in September is 12h and 8min.
On the first day of September, sunrise is at 7:08 am and sunset at 7:19 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 7:06 pm +08.

Sunshine

In September, the average sunshine is 8.7h.

UV index

The months with the highest UV index in Shah Alam are January through December, with an average maximum UV index of 7. The months with the lowest UV index in Shah Alam are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: During September, 7 as the daily maximum UV index converts into the following advice:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. 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. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.