Siem Reap Weather & Climate: Best Time to Visit

In Siem Reap temperatures are generally consistent throughout the year. On average, daytime temperatures range from a very hot 36°C (97°F) in April to a very warm 32°C (90°F) in December.

Nighttime temperatures range from 27°C (81°F) in April to 22°C (72°F) in December.

Check out our detailed temperature page for more information.

Temperature ranges by month

Siem Reap experiences significant rainfall throughout the year, averaging 1470 mm (58 in) of precipitation annually. The seasons in Siem Reap bring significant changes in precipitation. The wettest month, September, receives heavy rainfall, with an average of 286 mm (11 in) of precipitation. This rainfall is distributed across 18 rainy days.

In contrast, the driest month, January, experiences much less rainfall, totaling 9.8 mm (0.4 in) over a single rainy day. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Siem Reap Precipitation page.

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

The average number of days each month with precipitation

The relative humidity is high throughout the year in Siem Reap.

The city experiences its highest humidity in September, reaching 75%. In March, the humidity drops to its lowest level at 58%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year