July weather forecast
Vientiane, Laos

Water geysers around the memorial Patuxay Monument in Vientiane, Laos
Water geysers around the memorial Patuxay Monument in Vientiane, Laos

July

Weather in July

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

The transition into July notes an average high-temperature of a still hot 31.3°C (88.3°F), revealing a mild distinction from the 31.9°C (89.4°F) in June. In the month of July, Vientiane's average low-temperature falls to a warm 24.7°C (76.5°F).

Heat index

In July, the average heat index is estimated at an extremely hot 43°C (109.4°F). Remain cautious: Heat cramps along with heat exhaustion are foreseeable. Ongoing activity may precipitate heatstroke.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is found by incorporating humidity levels into the air temperature measurement. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

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, there are 118 rainfall days, and 1661mm (65.39") of precipitation is accumulated.

Daylight

In July, the average length of the day is 13h and 5min.
On the first day of July, sunrise is at 05:37 and sunset at 18:49. On the last day of the month, sunrise is at 05:47 and sunset at 18:44 +07.

Sunshine

In July, the average sunshine 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 of 11, and more, symbolizes an ultimate health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: A daily maximum UV index of 12 in July translates into the following instructions:
Adopt every vital precaution, unprotected skin and eyes may burn rapidly. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Opt for tightly woven and loose clothing to enhance protection from the Sun. After a swim or outdoor exercise, one should liberally reapply broad-spectrum sunscreen with a sun protection factor of 30 or higher.

Frequently asked questions

How hot is it in July?
In Vientiane, in July, the average high-temperature is 31.3°C (88.3°F), and the average low-temperature is 24.7°C (76.5°F). In July, the average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, is estimated at 43°C (109.4°F).
What is the average humidity in July?
In July, the average relative humidity is 82%.
How much does it rain in July?
In Vientiane, during July, the rain falls for 20 days and regularly aggregates up to 272mm (10.71") of precipitation.
How many hours of daylight does Vientiane have in July?
In Vientiane, the average day length in July is 13h and 5min.
When is the sunrise / sunset in July?
In July, on the first day of the month, sunrise is at 05:37 and sunset at 18:49. On the last day of the month, sunrise is at 05:47 and sunset at 18:44 +07.
How long on average sun shines in July?
In July, the average sunshine duration is 4.8h.
What is the month with the highest UV index?
The months with the highest UV index are March through September, with an average maximum UV index of 12.
How high is the UV index in July?
In July, the average daily maximum UV index is 12. A UV Index value of 11, and more, symbolizes an extreme health threat from unsafe exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average UV index
Average temperature in July
Vientiane, Laos
  • Average high temperature in July: 31.3°C

The warmest month (with the highest average high temperature) is April (34.3°C).
The month with the lowest average high temperature is December (28.1°C).

  • Average low temperature in July: 24.7°C

The month with the highest average low temperature is June (24.9°C).
The coldest month (with the lowest average low temperature) is January (16.4°C).

Average humidity in July
Vientiane, Laos
  • Average humidity in July: 82%

The month with the highest relative humidity is August (84%).
The month with the lowest relative humidity is March (66%).

Average rainfall in July
Vientiane, Laos
  • Average rainfall in July: 272.3mm

The wettest month (with the highest rainfall) is August (334.6mm).
The driest month (with the least rainfall) is December (2.5mm).

Average rainfall days in July
Vientiane, Laos
  • Average rainfall days in July: 20 days

The month with the highest number of rainy days is August (21 days).
The months with the least rainy days are January and December (1 days).

Average daylight in July /
Average sunshine in July
Vientiane, Laos
  • Average daylight in July: 13h and 1min

The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 6min).

  • Average sunshine in July: 4h and 5min

The month with the most sunshine is December (Average sunshine: 8h and 18min).
The month with the least sunshine is August (Average sunshine: 4h and 24min).

Average UV index in July
Vientiane, Laos
  • Average UV index in July: 12

The months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 8).

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