, like March
, is a hot spring month in Phnom Penh
, with an average temperature ranging between max 34.9°C (94.8°F) and min 25°C (77°F).
The warmest months are March and April, with an average high-temperature of 34.9°C (94.8°F).
The average heat index in April is estimated at a burning hot 51.7°C (125.1°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', 'feels like', 'real feel', or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (wind, pregnancy, metabolic differences), and activity. 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.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. 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.
In Phnom Penh, the average relative humidity in April is 73%.
In April, in Phnom Penh, the rain falls for 8.6 days. Throughout April, 101mm (3.98") of precipitation is accumulated. In Phnom Penh, during the entire year, the rain falls for 153.4 days and collects up to 1635.6mm (64.39") of precipitation.
The average length of the day in April is 12h and 23min.
On the first day of the month, sunrise is at 05:57 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.
The average sunshine in April is 8h.
, 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 extreme health hazard from exposure to the Sun's UV radiation for the ordinary person.Note
: The average daily UV index of 12 in April transform into the following instructions:
Take all required precautions, as unprotected skin and eyes can burn in minutes. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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.