May weather forecast
Phnom Penh, Cambodia

May is characterized in Phnom Penh with the highest average highs of the year, peaking at 34.9°C (94.8°F) and positioning it as the hottest month. As the rain showers become more frequent, the humidity levels rise to 77%, enhancing the tropical feel of the city. On average, the sun shines for 6.5 hours per day, contributing a soothing brightness to the lush city. Rainfall leaps to 112mm (4.41") making it paramount to pack an umbrella before venturing outdoors. Despite the humidity and the heat, the city continues to pulsate with energy, inviting visitors to partake in the myriad of experiences it offers.

Temperature

May records an average high-temperature of a still hot 34.3°C (93.7°F), indicating a minor variation from the preceding month. An average low-temperature of 25.3°C (77.5°F) is observed in Phnom Penh during the May nights.

Heat index

May's mean heat index is evaluated at a blazing hot 52°C (125.6°F). Take heed: Heat exhaustion and heat cramps are anticipated. Heatstroke is a potential outcome of continuous activity.
Research indicates the heat index considers values in shaded locales and with light winds. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', combines both the air temperature and the humidity level to give a perceived human temperature. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

In May, the average relative humidity is 77%.

Rainfall

In Phnom Penh, in May, during 16.4 rainfall days, 112mm (4.41") of precipitation is typically accumulated. Throughout the year, there are 153.4 rainfall days, and 1636mm (64.41") of precipitation is accumulated.

Daylight

The average length of the day in May in Phnom Penh, Cambodia, is 12h and 40min.
On the first day of May in Phnom Penh, sunrise is at 05:41 and sunset at 18:13. On the last day of the month, sunrise is at 05:35 and sunset at 18:20 +07.

Sunshine

In May, the average sunshine is 6.5h.

UV index

The months with the highest UV index in Phnom Penh, Cambodia, are February through October, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an extreme threat to health from exposure to the Sun's UV rays for the average person.
Note: During May, 12 as the daily maximum UV index converts into the following advice:
Ensure all key precautions. Defense against sun exposure is critical. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Apply and frequently reapply a minimum SPF 30 sunscreen even on cloudy days, especially after swimming or an outdoor workout.