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

December 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
December, the first month of the winter, in Phnom Penh, is a tropical month, with average temperature varying between 21.7°C (71.1°F) and 30.1°C (86.2°F).

Temperature

In Phnom Penh, Cambodia, the average high-temperature is practically the same as in November - a hot 30.1°C (86.2°F). The average low-temperature, in December, is 21.7°C (71.1°F).

Humidity

The average relative humidity in Phnom Penh is 73%.

Rainfall

In Phnom Penh, Cambodia, it is raining for 4.8 days, with typically 80.3mm (3.2") of accumulated precipitation. Throughout the year, in Phnom Penh, there are 153.4 rainfall days, and 1635.6mm (64.4") of precipitation is accumulated.

Daylight

January and December, with an average of 11.5h of daylight, are months with the shortest days.

Sunshine

The average sunshine in Phnom Penh is 7.8h.

UV index

January, November and December, with an average maximum UV index of 10, are months with the lowest UV index. A UV Index estimate of 8 to 10 represents a very high health hazard from the exposure to the Sun's UV rays for average individuals.
The daily maximum UV index of 10 in December interpret into the following advice:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. 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. 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 December in Phnom Penh?

In Phnom Penh, in December, the average high-temperature is 30.1°C (86.2°F), and the average low-temperature is 21.7°C (71.1°F).

What is the average humidity in December in Phnom Penh?

In December, the average relative humidity is 73%.

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

In Phnom Penh, during December, the rain falls for 4.8 days and regularly aggregates up to 80.3mm (3.2") of precipitation.

What is the month with the shortest days in Phnom Penh?

Months with the shortest days in Phnom Penh are January and December, with an average of 11.5h of daylight.

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

The average length of the day in December in Phnom Penh, Cambodia, is 11.5h.

How long on average sun shines in December in Phnom Penh?

In December, the average sunshine is 7.8h.

What is the month with the lowest UV index in Phnom Penh?

Months with the lowest UV index in Phnom Penh are January, November and December, with an average maximum UV index of 10.

What is the UV index intensity in December in Phnom Penh?

In Phnom Penh, Cambodia, the average daily maximum UV index in December is 10. A UV Index reading of 8 to 10 represents a very high health threat from unprotected exposure to the UV radiation.
Average temperature in December - Phnom Penh, Cambodia
  • Average high temperature in December: 30.1°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 December: 21.7°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 December - Phnom Penh, Cambodia
  • Average humidity in December: 73%

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 December - Phnom Penh, Cambodia
  • Average rainfall in December: 80.3mm

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 December - Phnom Penh, Cambodia
  • Average rainfall days in December: 4.8 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 December / Average sunshine in December - Phnom Penh, Cambodia
  • Average daylight in December: 11.5h

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 December: 7.8h

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 December - Phnom Penh, Cambodia
  • Average UV index in December: 10

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).