April 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 April

April distinguishes itself by hosting the most torrid conditions in Bangkok, Thailand throughout the year. This month witnesses the zenith of temperature, soaring up to 35.4°C (95.7°F), making it the warmest period in the city. Concurrently, precipitation accelerates sharply, attaining 91mm (3.58"), spread across six days of rainfall. These weather conditions create a unique blend of scorching heat and refreshing rain. With the end of the month, the city hints at a substantial rise in relative humidity, making way for a more cool atmosphere in May.

Temperature

Bangkok records the warmest temperatures in April, averaging a high of 35.4°C (95.7°F) and a low of 26.9°C (80.4°F).

Heat index

The heat index value for April is evaluated at a blazing hot 53°C (127.4°F). Notice: Heat cramps and heat exhaustion are likely. Continued strenuous activity might lead to heatstroke.
Factoring in the heat index, values are geared towards shaded areas with light breezes. 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' or 'real feel', gauges the sensation of temperature factoring in the air's moisture content. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. 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 hold great significance to children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

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

Rainfall

In Bangkok, during April, the rain falls for 6 days and regularly aggregates up to 91mm (3.58") of precipitation. Throughout the year, there are 128 rainfall days, and 1648mm (64.88") of precipitation is accumulated.

Sea temperature

In Bangkok, in April, the average water temperature is 29.4°C (84.9°F).
Note: Water surface temperatures from 25°C (77°F) to 29°C (84.2°F) are considered optimal and extremely delightful for long-lasting pleasure in any water activity.

Daylight

In Bangkok, the average length of the day in April is 12h and 26min.
On the first day of the month, sunrise is at 06:13 and sunset at 18:29. On the last day of April, sunrise is at 05:56 and sunset at 18:33 +07.

Sunshine

In April, the average sunshine is 8.6h.

UV index

The months with the highest UV index are February through September, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an extreme threat to health from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index of 12 in April interprets into the following recommendations:
Execute all vital precautions. Preventing sun damage is of utmost importance. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Even on overcast days, apply and frequently reapply a sunscreen with SPF 30 or more, specifically after a swim or outdoor workout. Take note! Sand and water reflections strengthen the Sun's UV exposure.

Frequently asked questions

What is the hottest time of year?

Bangkok's April weather, with an average high temperature of 35.4°C (95.7°F) and an average low temperature of 26.9°C (80.4°F), tends to be the warmest of the year.

How hot is it in April?

April temperatures vary between a high-temperature of 35.4°C (95.7°F) and a low-temperature of 26.9°C (80.4°F). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in April is evaluated at 53°C (127.4°F).

What is the average humidity in April?

In April, the average relative humidity is 72%.

How much does it rain in April?

In Bangkok, in April, during 6 rainfall days, 91mm (3.58") of precipitation is typically accumulated.

How warm is the water in April?

In April, the average sea temperature is 29.4°C (84.9°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.

What is the average length of the day in April?

In April, the average day length is 12h and 26min.

When are sunrise and sunset in April?

On the first day of April, sunrise is at 06:13 and sunset at 18:29. On the last day of the month, sunrise is at 05:56 and sunset at 18:33 +07.

How long on average sun shines in April?

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

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.

What is the UV index reading in April?

The average daily maximum UV index in April in Bangkok is 12. A UV Index of 11, and more, symbolizes an excessive health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average UV index

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).

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%).

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).

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).
The months with the least rainy days are January and December (1 days).

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).

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

Average daylight in April / Average sunshine in April - Bangkok, Thailand
  • Average daylight in April: 12h and 2min

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 April: 8h and 4min

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 April
Bangkok, Thailand

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