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Siem Reap Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Siem Reap.
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Climate overview of Siem Reap
Siem Reap, Siem Reap Province, Cambodia, has a stable climate with little temperature variation across the year. Average daytime temperatures hover around 34°C (93°F), peaking in April at 36°C (97°F) and dipping in December to 32°C (90°F).
The city receives considerable rainfall, with around 1470 mm (58 in) annually. September is the wettest month. It has distinct dry (December to February) and wet (August to October) seasons.
Siem Reap Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Siem Reap - and find the best time to visit.
Monthly Temperature in Siem Reap
With minimal seasonal shifts, Siem Reap experiences a constant climate year-round. Typically, average maximum daytime temperatures range from a very hot 36°C (97°F) in April to a very warm 32°C (90°F) in the coolest month, December.
Nights vary from 27°C (81°F) in April to around 22°C (72°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Siem Reap
Siem Reap has a notably wet climate with abundant precipitation, recording 1470 mm (58 in) of rainfall per year. The climate in Siem Reap shows significant variation throughout the year. Expect heavy rainfall in September, the wettest month, with an average of 286 mm (11 in) of precipitation over 18 rainy days.
In contrast, the driest month January offers drier and sunnier days, with around 9.8 mm (0.4 in) of rainfall over a single rainy day. 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
Humidity in Siem Reap by Month
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
Best Time to Visit Siem Reap
The most comfortable overall weather for exploring Siem Reap is usually found in December. Conditions are generally least comfortable in February, March, April, May, June, July, August, September and October.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
good
Feb
very hot
Mar
very hot
Apr
very hot
May
very hot
Jun
very hot
Jul
wet
Aug
wet
Sep
very wet
Oct
very wet
Nov
good
Dec
very good
- Best overall: December
- Warmest weather: March, April and May
- Fewest rainy days: January, February and December
- Wettest months: May, June, July, August, September and October, when rainfall is highest.
- Seasonal pattern: Distinct dry (December to February) and wet (August to October) seasons
Frequently asked questions about the climate in Siem Reap
What is the best time to visit Siem Reap?
December typically offers the most optimal weather in Siem Reap. In contrast, February, March, April, May, June, July, August, September and October tend to have less optimal conditions. Siem Reap has distinct dry (December to February) and wet (August to October) seasons.
What temperatures can I expect in Siem Reap?
Daytime highs range from 32°C (90°F) in December to 36°C (97°F) in April. Nighttime lows range from 22°C (72°F) to 27°C (81°F). Temperatures stay relatively stable year-round.
How much rain does Siem Reap get?
Annual rainfall is around 1470 mm (58 in). September is the wettest month with 286 mm (11 in), while January is the driest with 9.8 mm (0.4 in).
Siem Reap 3-Day Forecast
Siem Reap on the map
Siem Reap is highlighted - select any city to see its climate.
Popular in September
Where to go in September - average daytime high across popular destinations.
Battambang
34°C (93°F) Phnom Penh33°C (91°F) Siem Reap33°C (91°F) Kep30°C (86°F) Chambok31°C (88°F) Koh Rong Island29°C (84°F) Kampot30°C (86°F) Sihanoukville29°C (84°F) Bucket list
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