Phnom Penh Weather & Climate: Best Time to Visit

The temperature in Phnom Penh remains steady throughout the year, providing a consistently very hot climate. Average daytime temperatures reach a very hot 37°C (99°F) in April. In January, the coolest month of the year, temperatures drop to a very warm 33°C (91°F).

At night, temperatures range from around 27°C (81°F) in April to 23°C (73°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Phnom Penh has a relatively rainy climate with high precipitation levels, averaging 1415 mm (56 in) of rainfall annually. Phnom Penh can be quite wet during September, receiving approximately 252 mm (9.9 in) of precipitation over 19 rainy days.

In contrast, during the driest month (February), you will experience much drier conditions, with 12 mm (0.5 in) of precipitation spread across 2 rainy days days. For more details, please visit our Phnom Penh Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Phnom Penh can be enjoyed more throughout the sunniest month of March under a blue sky, with approximately 9.0 hours of sunshine daily. In contrast, the city experiences much darker days in September, with only 4.3 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in Phnom Penh.

The city experiences its highest humidity in September, reaching 84%. In February, the humidity drops to its lowest level at 71%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year

The mean wind speed varies between 2 m/s (4 knots) and 3 m/s (6 knots) throughout the year. It is lowest in January, February, May, September and October and highest during March, April, June, July, August, November and December. What does this mean?

The mean monthly wind speed over the year (meters per second)