May signals the onset of true monsoon weather in
Pakse,
Laos as evidenced by the substantial rise in rainfall to 223mm (8.78"). The change is complemented by a small decline in average high temperatures, to a more comforting level. Humidity takes a significant surge, creating the moist and damp conditions characteristic of this tropical region's rainy season. Despite the wet atmosphere, daylight hours reach their peak for the year, alongside a constant UV index. Even though there is a decrease in sunshine hours, May retains substantial daylight time for various activities.
Temperature
Pakse starts May with an average high-temperature of a still hot 32.9°C (91.2°F), a minor shift from
April's 34.8°C (94.6°F). Throughout the May nights, Pakse encounters a low-temperature of 24.9°C (76.8°F).
Heat index
May's average heat index is appraised at a blazing hot 45°C (113°F).
Keep on guard: Heat exhaustion and heat cramps are probable. Heatstroke is a possible danger with ongoing physical activity.
Heat index values are typically calculated for conditions of shade and a light breeze. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. Overheating and potential dehydration arise when body heat gain eclipses its release capability.
Humidity
The average relative humidity in May is 75%.
Rainfall
In Pakse, in May, it is raining for 15 days, with typically 223mm (8.78") of accumulated precipitation. Throughout the year, there are 128 rainfall days, and 2075mm (81.69") of precipitation is accumulated.
Daylight
The average length of the day in May is 12h and 50min.
On the first day of the month, sunrise is at 05:33 and sunset at 18:14. On the last day of May, sunrise is at 05:25 and sunset at 18:23 +07.
Sunshine
In Pakse, the average sunshine in May is 7h.
UV index
The months with the highest UV index are
February through
September, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an excessive health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: In May, the average maximum UV index of 12 translates into the following recommendations:
Adopt all important safety measures, unprotected skin may burn rapidly. 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. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. A broad-spectrum sunscreen of SPF 30+ should be used liberally and reapplied every two hours or post an outdoor workout or swim.