July marks the midpoint of the year with an increment in rain in
Vientiane,
Laos. The shift from 280mm (11.02") in
June to 272mm (10.71") entails higher levels of humidity, an 82% relative humidity. Despite the prevailing rains and the high humidity, the city remains bustling and active. The tropical backdrop adds to the city's allure while the consistent rainfall allows for a very different Vientiane experience.
Temperature
July's onset in Vientiane sees an average high-temperature of a still tropical 31.3°C (88.3°F), exhibiting a slight fluctuation from the previous month. July in Vientiane witnesses an average low-temperature hovering around a warm 24.7°C (76.5°F).
Heat index
The heat index value during July is computed to be a scorching 43°C (109.4°F).
Vigilance: Heat cramps and heat exhaustion are likely. The likelihood of heatstroke increases with continued activity.
Data suggests that the heat index is set for environments in shade and with a light wind. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', determines the feeling of heat when you account for the relative humidity. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.
Humidity
The average relative humidity in July is 82%.
Rainfall
In Vientiane, in July, it is raining for 20 days, with typically 272mm (10.71") of accumulated precipitation. Throughout the year, in Vientiane, there are 118 rainfall days, and 1661mm (65.39") of precipitation is accumulated.
Daylight
In July, the average length of the day in Vientiane is 13h and 5min.
On the first day of the month, sunrise is at 05:37 and sunset at 18:49. On the last day of July, sunrise is at 05:47 and sunset at 18:44 +07.
Sunshine
In Vientiane, the average sunshine in July is 4.8h.
UV index
The months with the highest UV index are
March through
September, with an average maximum UV index of 12. A UV Index estimate of 11, and higher, represents an extreme health hazard from exposure to the Sun's UV radiation for the average person.
Note: In July, a regular UV index of 12 translates into these guidelines:
Take all required precautions, as unprotected skin and eyes can burn in minutes. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Applying and reapplying a broad-spectrum sunscreen with a minimum SPF 30 after every two hours, outdoor workout, or swim is recommended.