, the same as June
, in Vientiane
, is another tropical summer month, with an average temperature varying between 31.3°C (88.3°F) and 24.7°C (76.5°F).
In Vientiane, the average high-temperature in July is relatively the same as in June - a still hot 31.3°C (88.3°F). The average low-temperature, is 24.7°C (76.5°F).
The average heat index in July is evaluated at a scorching 42.7°C (108.9°F). Be wary
: Heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.Note
: The heat index, also known as 'apparent temperature', 'feels like', 'felt air temperature', or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like pregnancy, metabolic differences, wind, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 37.5°C (99.5°F) to 38.3°C (100.9°F), thermal conditions are potentially life-threatening.
The average relative humidity in July is 82%.
In July, the rain falls for 20 days. Throughout July, 272.3mm (10.72") of precipitation is accumulated. In Vientiane, during the entire year, the rain falls for 118 days and collects up to 1660.5mm (65.37") of precipitation.
The average length of the day in July 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, in Vientiane, sunrise is at 05:47 and sunset at 18:44 +07.
In July, the average sunshine is 4.8h.
The months with the highest UV index in Vientiane are March
, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an extreme health hazard from unsafe exposure to UV radiation for average individuals.Note
: The daily maximum UV index of 12 in July interpret into the following advice:
Practice all-important precautions. Light skin people may get burned in less than 5 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise.