September brings a marked change in
Pakse,
Laos's weather conditions with a dramatic decrease in rainfall to 298mm (11.73"). This decrease in rainfall indicates the retreat of the monsoon season. Despite the subsiding rainfall, humidity manages to stay at a high level. The fall in rainfall coincides with diminishing daylight, signaling shorter days. Nevertheless, the UV index remains high, with a slight shift towards the lower spectrum.
Temperature
The transition from
August to September brings an average high-temperature of a still tropical 30.3°C (86.5°F), barely different from August's 30.1°C (86.2°F). An average nighttime temperature of 23.7°C (74.7°F) is witnessed throughout September.
Heat index
For most parts of September, the heat index is appraised at a blisteringly hot 40°C (104°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', determines the feeling of heat when you account for the relative humidity. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are essentially critical for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.
Humidity
The average relative humidity in September in Pakse is 84%.
Rainfall
In Pakse, Laos, during September, the rain falls for 13 days and regularly aggregates up to 298mm (11.73") of precipitation. Throughout the year, in Pakse, there are 128 rainfall days, and 2075mm (81.69") of precipitation is accumulated.
Daylight
In Pakse, the average length of the day in September is 12h and 13min.
On the first day of the month, sunrise is at 05:44 and sunset at 18:09. On the last day of September, sunrise is at 05:46 and sunset at 17:46 +07.
Sunshine
In September, the average sunshine is 5.4h.
UV index
February through September, with an average maximum UV index of 12, are months with the highest UV index. A UV Index of 11, and more, symbolizes an ultimate health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 12 in September transforms into the following instructions:
Employ all critical precautions. Guarding against sun damage is essential. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Applying and reapplying liberally a broad-spectrum sunscreen of SPF 30+ every two hours, and straight after a swim or outdoor activity is recommended.