August weather forecast
Bangkok, Thailand

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A beautiful park outside the Wat Ratchanatdaram Temple in the heart of Bangkok, Thailand
A beautiful park outside the Wat Ratchanatdaram Temple in the heart of Bangkok, Thailand

Weather in August

In Bangkok, August is typified by sustained rainfall, making it one of the wettest months of the year. Torrential showers are widespread, resulting in 219mm (8.62") precipitation, spreading across an extensive 20 days, making it the most rainy month. However, daylight duration begins to recede, mirroring the gradual approach of the dry season. Relative humidity also reaches its highest annual level, adding to the city's overall damp theme. As September approaches, angkorians await a decline in monsoon intensity.

Temperature

August registers an average high-temperature of a still hot 32.9°C (91.2°F), slightly varied from July's 33.2°C (91.8°F). Throughout August, Bangkok's nights cool down to an average of 25.5°C (77.9°F).

Heat index

In August, the average heat index is computed to be a blazing hot 46°C (114.8°F). Eyes open: Heat cramps and heat exhaustion are expected. Prolonged exertion could lead to heatstroke.
In terms of the heat index, values are set with light wind and shade conditions in mind. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', joins air temperature with relative humidity to produce a temperature perception for humans. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

In Bangkok, the average relative humidity in August is 76%.

Rainfall

In Bangkok, during August, the rain falls for 20 days and regularly aggregates up to 219mm (8.62") of precipitation. In Bangkok, during the entire year, the rain falls for 128 days and collects up to 1648mm (64.88") of precipitation.

Sea temperature

In Bangkok, in August, the average water temperature is 28.9°C (84°F).
Note: Swimming, diving, and other water-related activities in temperatures between 25°C (77°F) and 29°C (84.2°F) are considered highly enjoyable and satisfying for longer durations without uneasiness.

Daylight

In Bangkok, Thailand, the average length of the day in August is 12h and 34min.
On the first day of the month, sunrise is at 06:02 and sunset at 18:46. On the last day of August, sunrise is at 06:06 and sunset at 18:30 +07.

Sunshine

August and September, with an average of 5.2h of sunshine, are months with the least sunshine.

UV index

February through September, with an average maximum UV index of 12, are months with the highest UV index. A UV Index value of 11, and more, symbolizes an ultimate health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 12 during August translates into the following guidance:
Undertake every vital safety procedure, as unprotected skin and eyes could sustain burns in no time. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Applying and reapplying a broad-spectrum sunscreen with a minimum SPF 30 after every two hours, outdoor workout, or swim is recommended. Heads up! The reflection of sand and water notably intensifies UV rays from the Sun.

Frequently asked questions

How hot does it get in August?

An average high-temperature, in August, in Bangkok, is 32.9°C (91.2°F) and the average low-temperature is 25.5°C (77.9°F). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines relative humidity and air temperature, is computed to be 46°C (114.8°F).

What is the average humidity in August?

In August, the average relative humidity is 76%.

How much does it rain in August?

In Bangkok, in August, during 20 rainfall days, 219mm (8.62") of precipitation is typically accumulated.

What is the sea water temperature in August?

In Bangkok, the average seawater temperature in August is 28.9°C (84°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

How many hours of daylight does Bangkok have in August?

The average day length in August is 12h and 34min.

When is the sunrise / sunset in August?

On the first day of August, sunrise is at 06:02 and sunset at 18:46. On the last day of the month, sunrise is at 06:06 and sunset at 18:30 +07.

What is the month with the least sunshine?

The months with the least sunshine are August and September, with an average of 5.2h of sunshine.

How many hours of sunshine does Bangkok have in August?

In Bangkok, the average sunshine duration in August is 5.2h.

What is the month with the highest UV index?

The months with the highest UV index are February through September, with an average maximum UV index of 12.

How high is the UV index in August?

In Bangkok, Thailand, the average daily maximum UV index in August is 12. A UV Index value of 11, and more, symbolizes an ultimate hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in August
Bangkok, Thailand

Average temperature in August - Bangkok, Thailand
  • Average high temperature in August: 32.9°C

The warmest month (with the highest average high temperature) is April (35.4°C).
The month with the lowest average high temperature is December (31.7°C).

  • Average low temperature in August: 25.5°C

The month with the highest average low temperature is April (26.9°C).
The coldest month (with the lowest average low temperature) is December (22°C).

Average humidity in August
Bangkok, Thailand

Average humidity in August - Bangkok, Thailand
  • Average humidity in August: 76%

The month with the highest relative humidity is September (79%).
The month with the lowest relative humidity is December (66%).

Average rainfall in August
Bangkok, Thailand

Average rainfall in August - Bangkok, Thailand
  • Average rainfall in August: 219.3mm

The wettest month (with the highest rainfall) is September (334.3mm).
The driest month (with the least rainfall) is December (6.3mm).

Average rainfall days in August
Bangkok, Thailand

Average rainfall days in August - Bangkok, Thailand
  • Average rainfall days in August: 20 days

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

Average sea temperature in August
Bangkok, Thailand

Average sea temperature in August - Bangkok, Thailand
  • Average sea temperature in August: 28.9°C

The best month for swimming (with the highest average sea temperature) is May (29.9°C).
The coldest month (with the lowest average sea temperature) is January (26.7°C).

Average daylight in August /
Average sunshine in August
Bangkok, Thailand

Average daylight in August / Average sunshine in August - Bangkok, Thailand
  • Average daylight in August: 12h and 4min

The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 18min).

  • Average sunshine in August: 5h and 1min

The month with the most sunshine is February (Average sunshine: 9h and 0min).
The months with the least sunshine are August and September (Average sunshine: 5h and 12min).

Average UV index in August
Bangkok, Thailand

Average UV index in August - Bangkok, Thailand
  • Average UV index in August: 12

The months with the highest UV index are February, March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 9).

Bangkok, Thailand

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