April weather forecast
Phnom Penh, Cambodia

Moving into April, Phnom Penh displays even more pronounced tropical characteristics. A significant leap in rainfall to 101mm (3.98") signifies the approaching monsoon season while the UV index remains constant at 12. This increase in precipitation does not deter the sun from making its appearance known with an average of 12.4 daylight hours per day. Humidity levels inch upwards, having a tangible effect on the perceived temperature despite the actual increase being minimal. The potential for short-lived yet intense showers generates a refreshed cityscape, urging visitors to embrace the whole experience.

Temperature

Phnom Penh experiences its warmest period in March and April, averaging a high-temperature of 34.9°C (94.8°F).

Heat index

April's mean heat index is evaluated at a blazing hot 52°C (125.6°F). Mindful: Heat cramps and heat exhaustion are to be expected. Extended physical effort might result in heatstroke.
Factoring in the heat index, values are geared towards shaded areas with light breezes. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', marries air temperature and humidity to produce a value illustrating perceived warmth. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. 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 highly critical to babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation of heat. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

In April, the average relative humidity is 73%.

Rainfall

In Phnom Penh, in April, during 8.6 rainfall days, 101mm (3.98") of precipitation is typically accumulated. Throughout the year, in Phnom Penh, there are 153.4 rainfall days, and 1636mm (64.41") of precipitation is accumulated.

Daylight

In Phnom Penh, the average length of the day in April is 12h and 23min.
On the first day of the month, sunrise is at 05:56 and sunset at 18:11. On the last day of April, in Phnom Penh, sunrise is at 05:41 and sunset at 18:13 +07.

Sunshine

In April, the average sunshine in Phnom Penh is 8h.

UV index

February through October, with an average maximum UV index of 12, are months with the highest UV index. A UV Index of 11, and more, symbolizes an excessive health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: A daily high UV index of 12 in April leads to these guidelines:
Employ all critical precautions. Guarding against sun damage is essential. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Frequent application of a broad-spectrum SPF 30+ sunscreen is crucial, reapply it every two hours or immediately post swimming or outdoor exercise.