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

January 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
January, the same as December, in Phnom Penh, Cambodia, is another tropical winter month, with temperature in the range of an average low of 21.9°C (71.4°F) and an average high of 31.5°C (88.7°F).

Temperature

In January, the average high-temperature is almost the same as in December - a still tropical 31.5°C (88.7°F). The average low-temperature, in January, is 21.9°C (71.4°F).

Heat index

The average heat index in January is appraised at a torrid 40°C (104°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
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 'real feel', 'feels like', 'felt air temperature', or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent.

Humidity

The average relative humidity in Phnom Penh is 73%.

Rainfall

In Phnom Penh, Cambodia, in January, it is raining for 2.8 days, with typically 25.5mm (1") of accumulated precipitation. In Phnom Penh, during the entire year, the rain falls for 153.4 days and collects up to 1635.6mm (64.4") of precipitation.

Daylight

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

Sunshine

In January, the average sunshine in Phnom Penh, Cambodia, is 8.4h.

UV index

January, November and December, with an average maximum UV index of 10, are months with the lowest UV index in Phnom Penh. A UV Index of 8 to 10 symbolizes a very high health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In January, the average maximum UV index of 10 translate into the following recommendations:
Take special precautions, as unprotected skin can be damaged and can burn quickly. 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. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise.

What is the temperature in January in Phnom Penh?

The average high-temperature, in January, is 31.5°C (88.7°F), while the average low-temperature is 21.9°C (71.4°F).

What is the average humidity in January in Phnom Penh?

In Phnom Penh, Cambodia, the average relative humidity in January is 73%.

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

In Phnom Penh, in January, it is raining for 2.8 days, with typically 25.5mm (1") of accumulated precipitation.

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

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

How many hours of daylight does Phnom Penh have in January?

In January, the average length of the day in Phnom Penh is 11.5h.

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

In Phnom Penh, the average sunshine in January is 8.4h.

When is the lowest UV index in Phnom Penh?

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

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

The average daily maximum UV index in January in Phnom Penh is 10. A UV Index value of 8 to 10 symbolizes a very high health risk from unsafe exposure to the Sun's UV rays.
Average temperature in January - Phnom Penh, Cambodia
  • Average high temperature in January: 31.5°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 January: 21.9°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 January - Phnom Penh, Cambodia
  • Average humidity in January: 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 January - Phnom Penh, Cambodia
  • Average rainfall in January: 25.5mm

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 January - Phnom Penh, Cambodia
  • Average rainfall days in January: 2.8 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 January / Average sunshine in January - Phnom Penh, Cambodia
  • Average daylight in January: 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 January: 8.4h

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 January - Phnom Penh, Cambodia
  • Average UV index in January: 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).