July weather forecast
Vientiane, Laos

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

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

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.
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Frequently asked questions

How hot is it in Vientiane in July?

Vientiane in July has an average high-temperature of 31.3°C (88.3°F) and an average low-temperature of 24.7°C (76.5°F). The average heat index (a.k.a. 'real feel', 'feels like'), which factors the actual air temperature with the relative humidity, in July is computed to be 43°C (109.4°F).

What is the average humidity in July in Vientiane?

The average relative humidity in July is 82%.

How much does it rain in Vientiane in July?

In Vientiane, Laos, in July, it is raining for 20 days, with typically 272mm (10.71") of accumulated precipitation.

What is the average length of the day in July in Vientiane?

In Vientiane, Laos, the average day length in July is 13h and 5min.

When are sunrise and sunset in July in Vientiane?

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 Vientiane?

In July, the average sunshine duration in Vientiane is 4.8h.

What are the months with the highest UV index in Vientiane?

March through September, with an average maximum UV index of 12, are months with the highest UV index in Vientiane.

How high is the UV index in July in Vientiane?

In Vientiane, the average daily maximum UV index in July is 12. A UV Index estimate of 11, and higher, represents an ultimate hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in July
Vientiane, Laos

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).

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Average humidity in July
Vientiane, Laos

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%).

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Average rainfall in July
Vientiane, Laos

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).

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Average rainfall days in July
Vientiane, Laos

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).

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Average daylight in July /
Average sunshine in July
Vientiane, Laos

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).

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Average UV index in July
Vientiane, Laos

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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Vientiane, Laos

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