Phnom Penh
Cambodia
Long-term weather forecast
Long-term weather forecast

October weather forecast and climate
Phnom Penh, Cambodia

The buildings in the Royal Palace-yard in Phnom Penh, Cambodia
The buildings in the Royal Palace-yard in Phnom Penh, Cambodia
October, like September, is another hot autumn month in Phnom Penh, Cambodia, with average temperature ranging between min 23.8°C (74.8°F) and max 31.1°C (88°F).

Temperature

In October, the average high-temperature is essentially the same as in September - a still tropical 31.1°C (88°F). In Phnom Penh, the average low-temperature is 23.8°C (74.8°F).

Heat index

The average heat index in October is evaluated at a blistering 42.7°C (108.9°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 the 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 'felt air temperature', 'apparent temperature', 'real feel', or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, pregnancy, metabolic differences, and clothing affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, 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 normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

Months with the highest humidity in Phnom Penh are September and October, with an average relative humidity of 84%.

Rainfall

The month with the most rainfall is October when the rain falls for 24 days and typically aggregates up to 318.9mm (12.6") of precipitation.

Daylight

The average length of the day in Phnom Penh is 11.9h.

Sunshine

In Phnom Penh, the average sunshine is 6.5h.

UV index

February through October, with an average maximum UV index of 12, are months with the highest UV index in Phnom Penh. A UV Index reading of 11, and higher, represents an extreme threat to health from the exposure to the Sun's UV radiation for the ordinary person.
Note: In October, the average maximum UV index of 12 translate into the following recommendations:
Practice all essential precautions. Protection against sun damage is crucial. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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.

What is the temperature in October in Phnom Penh?

The average high-temperature, in October, in Phnom Penh, is 31.1°C (88°F), while the average low-temperature is 23.8°C (74.8°F). The average heat index (a.k.a. 'apparent temperature', 'real feel'), that represents influence of the relative humidity to air temperaure, in October is evaluated at 42.7°C (108.9°F).

What is the most humid month in Phnom Penh?

Months with the highest humidity are September and October, with an average relative humidity of 84%.

What is the average humidity in October in Phnom Penh?

The average relative humidity in October in Phnom Penh is 84%.

How many days does it rain in October in Phnom Penh?

In October, in Phnom Penh, the rain falls for 24 days. Throughout October, 318.9mm (12.6") of precipitation is accumulated.

What is the wettest month in Phnom Penh?

October is the month with the most rainfall in Phnom Penh. Rain falls for 24 days and accumulates 318.9mm (12.6") of precipitation.

What is the average length of the day in October in Phnom Penh?

In Phnom Penh, Cambodia, the average length of the day in October is 11.9h.

How many hours of sunshine does Phnom Penh have in October?

In October, the average sunshine in Phnom Penh is 6.5h.

What are the months with the highest UV index in Phnom Penh?

February through October, with an average maximum UV index of 12, are months with the highest UV index.

What is the UV index reading in October in Phnom Penh?

In Phnom Penh, Cambodia, the average daily maximum UV index in October is 12. A UV Index value of 11, and more, symbolizes an extreme health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in October - Phnom Penh, Cambodia
  • Average high temperature in October: 31.1°C

Warmest months (with the highest average high temperature) are March and April (34.9°C).
The month with the lowest average high temperature is November (29.9°C).

  • Average low temperature in October: 23.8°C

The month with the highest average low temperature is May (25.3°C).
The coldest month (with the lowest average low temperature) is December (21.7°C).

Average humidity in October - Phnom Penh, Cambodia
  • Average humidity in October: 84%

Months with the highest relative humidity are September and October (84%).
Months with the lowest relative humidity are February and March (71%).

Average rainfall in October - Phnom Penh, Cambodia
  • Average rainfall in October: 318.9mm

The wettest month (with the highest rainfall) is October (318.9mm).
The driest month (with the lowest rainfall) is February (11.5mm).

Average rainfall days in October - Phnom Penh, Cambodia
  • Average rainfall days in October: 24 days

The month with the highest number of rainy days is October (24 days).
The month with the lowest number of rainy days is February (2.4 days).

Average daylight in October / Average sunshine in October - Phnom Penh, Cambodia
  • Average daylight in October: 11.9h

The month with the longest days is June (Average daylight: 12.8h).
Months with shortest days are January and December (Average daylight: 11.5h).

  • Average sunshine in October: 6.5h

The month with most sunshine is March (Average sunshine: 8.6h).
The month with least sunshine is September (Average sunshine: 4.3h).

Average UV index in October - Phnom Penh, Cambodia
  • Average UV index in October: 12

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
Months with the lowest UV index are January, November and December (UV index 10).