April weather forecast
Bangkok, Thailand

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

Heat index

The average heat index in April is appraised at a life-threatening hot 53°C (127.4°F). Alert: Heat cramps and heat exhaustion are likely to occur. Prolonged exertion can lead to heatstroke.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

In April, the average relative humidity is 72%.

Rainfall

In Bangkok, during April, the rain falls for 6 days and regularly aggregates up to 91mm (3.58") 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, the average seawater temperature in April is 29.4°C (84.9°F).
Note: For swimming, diving, or other water activities, temperatures from 25°C (77°F) to 29°C (84.2°F) provide the most enjoyable experience for extended periods without discomfort.

Daylight

In April, the average length of the day 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 of 11, and more, symbolizes an extreme threat to health from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index, 12 in April, converts into the following recommendations:
Carry out every crucial safety measure. People with fair skin may sustain burns in fewer than 5 minutes. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Regularly apply and reapply a broad-spectrum sunscreen with a minimum SPF 30 every two hours, or straight after swimming or an outdoor activity. Take warning! Reflective sand and water surfaces intensify the Sun's UV rays.