April weather forecast and climate
Bangkok, Thailand

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 April

April in Bangkok, Thailand, is a torrid spring month, with average temperature ranging between min 26.9°C (80.4°F) and max 35.4°C (95.7°F).

Temperature

The warmest month is April, with an average high-temperature of 35.4°C (95.7°F) and an average low-temperature of 26.9°C (80.4°F).

Heat index

In April, the average heat index is evaluated at a blazing hot 53.1°C (127.6°F). Beware: Heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'real feel', or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like activity, differences in body mass, height, and shape, wind, and metabolic differences affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In April, the average relative humidity is 72%.

Rainfall

In Bangkok, in April, it is raining for 6 days, with typically 91.4mm (3.6") of accumulated precipitation. In Bangkok, during the entire year, the rain falls for 128 days and collects up to 1648.2mm (64.89") of precipitation.

Sea temperature

In April, the average sea temperature in Bangkok is 29.4°C (84.9°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In Bangkok, Thailand, the average length of the day is 12.4h.

Sunshine

In April, the average sunshine is 8.6h.

UV index

February through September, with an average maximum UV index of 12, are months with the highest UV index. A UV Index reading of 11, and higher, represents an ultimate health vulnerability from the exposure to the Sun's UV radiation for the average person.
Note: In April, the average maximum UV index of 12 translate into the following recommendations:
Practice all essential precautions. Protection against sun damage is crucial. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the warmest month in Bangkok?

The warmest month in Bangkok is April, with an average high-temperature of 35.4°C (95.7°F) and an average low-temperature of 26.9°C (80.4°F).

What is the temperature in April in Bangkok?

In Bangkok, in April, the average high-temperature is 35.4°C (95.7°F), and the average low-temperature is 26.9°C (80.4°F). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in April is evaluated at 53.1°C (127.6°F).

What is the average humidity in April in Bangkok?

In Bangkok, Thailand, the average relative humidity in April is 72%.

How much does it rain in Bangkok in April?

In April, in Bangkok, the rain falls for 6 days. Throughout April, 91.4mm (3.6") of precipitation is accumulated.

What is the sea water temperature in April in Bangkok?

In Bangkok, in April, the average water temperature is 29.4°C (84.9°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the average length of the day in April in Bangkok?

In Bangkok, Thailand, the average length of the day in April is 12.4h.

How long on average sun shines in April in Bangkok?

In April, the average sunshine in Bangkok, Thailand, is 8.6h.

When is the highest UV index in Bangkok?

Months with the highest UV index in Bangkok, Thailand, are February through September, with an average maximum UV index of 12.

How high is the UV index in April in Bangkok?

In April, the average daily maximum UV index in Bangkok is 12. A UV Index of 11, and more, symbolizes an ultimate hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in April
Bangkok, Thailand

Average temperature in April - Bangkok, Thailand
  • Average high temperature in April: 35.4°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 April: 26.9°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).

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Average humidity in April
Bangkok, Thailand

Average humidity in April - Bangkok, Thailand
  • Average humidity in April: 72%

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

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Average rainfall in April
Bangkok, Thailand

Average rainfall in April - Bangkok, Thailand
  • Average rainfall in April: 91.4mm

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

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Average rainfall days in April
Bangkok, Thailand

Average rainfall days in April - Bangkok, Thailand
  • Average rainfall days in April: 6 days

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

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Average sea temperature in April
Bangkok, Thailand

Average sea temperature in April - Bangkok, Thailand
  • Average sea temperature in April: 29.4°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).

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

Average daylight in April / Average sunshine in April - Bangkok, Thailand
  • Average daylight in April: 12.4h

The month with the longest days is June (Average daylight: 12.9h).
The month with the shortest days is December (Average daylight: 11.3h).

  • Average sunshine in April: 8.6h

The month with the most sunshine is February (Average sunshine: 9h).
Months with the least sunshine are August and September (Average sunshine: 5.2).

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Average UV index in April
Bangkok, Thailand

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

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).

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