Best time to visit Siem Reap

The best time to visit Siem Reap is anytime from mid-November through February during the winter dry season, although the weather is still hot in the middle of the day. Daytime temperatures average 27°C (80°F).

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Siem Reap – Weather summary
Hottest month	May – 35°C (95°F)
Coldest month	December – 30°C (86°F)
Sunniest month	January – 9 hrs daily
Wettest month	September – 290mm (11in) rainfall
Windiest month	August – 10kph (6mph)
Climate data: Average highs. Source: Cambodia Meteorological Department. Weather stations: the former Siem Reap International Airport (REP), located 8km (5mi) from Siem Reap as well as from the new Siem Reap–Angkor International Airport (SAI), located about 45km (28mi) east of Siem Reap and 50km (30mi) east of Angkor Wat.

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Siem Reap climate

Siem Reap has a year-round hot tropical climate, with a dry season from mid-November through April and a wet season from May through to October, with an average annual high of 31°C (87°F).

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Frequently asked questions

We answer the most commonly asked questions (FAQs) about the weather in Siem Reap.

What is the best month to visit Siem Reap?
December and January are the best months to visit Siem Reap – you can expect manily cool, dry and sunny weather.

Which is the hottest month in Siem Reap?
May is the hottest month in Siem Reap, with an average high temperature of 35°C (95°F) with extreme heat and humidity and a low of 26°C (79°F).

The hot season lasts from mid-March to mid-May, with a daily high temperature above 34°C (93°F).

Which is the coldest month in Siem Reap?
December is usually the coolest month of the year in Siem Reap, with an average high of 30°C (86°F) and a low of 22°C (71°F). Daytime temperatures average 27°C (80°F).

The cooler season lasts from November through January, with a daily average high temperature below 30°C (86°F).

Which is the sunniest month in Siem Reap?
The sunniest month in Siem Reap is usually January, with an average of nine hours of sunshine per day; that's on average 79% of daylight hours.

You can expect around eight hours of sunshine daily from November through April, during the dry season.

What is the humidity in Siem Reap?
Siem Reap experiences seasonal variation in perceived humidity, with approximate average relative humidity calculated at between 59% – 77% over the course of the year.

What do the humidity conditions feel like in Siem Reap?
We derive the humidity comfort level – what conditions feel like – from the dew point temperature, which measures moisture content in the atmosphere: a higher dew point feels more humid, while a lower dew point feels drier.

Meteorologists agree that dew point temperature is a more consistant indication of 'absolute humidity' than relative humidity, which fluctuates with temperature.

The average annual dew point in Siem Reap is 23°C (73°F), and varies over the course of the year from comfortable at 20°C (68°F) to muggy at 24°C (75°F).   

The more humid time of year in Siem Reap lasts from February through to mid-December, when you can expect the comfort level to be muggy at least 66% of the time.

The months with the most muggy days in Siem Reap are May through Octtober, when every day in each month is muggy or worse.

January is more comfortable, with around 17 days that are humid.

Which month has the most rain in Siem Reap?
September is usually the wettest month in Siem Reap, with 290mm (11in) of rainfall on average, distributed across 17 days.

The wet season in Siem Reap lasts from May through October, with a greater than 37% chance of a given day being a wet day. The heaviest rainfall in Siem Reap falls during the months of August and September.

The cloudiest month of the year in Siem Reap is August, during which the sky is overcast or mostly cloudy 92% of the time on average.

The dry season lasts from November through April; December and January have little to no rainfall.

Which is the windiest month in Siem Reap?
The windiest month of the year in Siem Reap is August, with an average hourly wind speed of more than 10 kilometres per hour (6 mph; 5 knots).

The windy part of the year lasts from June through to early-September, with average wind speeds of more than nine kilometres per hour (5.6 mph; 5 knots).

The less-windy time of year lasts from early-September through May. The calmest month of the year in Siem Reap is April, with an average hourly wind speed of seven kilometres per hour (4 mph; 3.8 knots).

The predominant average hourly wind direction varies throughout the year in Siem Reap.

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Siem Reap – Weather Averages

Holiday seasons

Peak season: November through February; Khmer New Year (mid-April).

Shoulder season: March through April.

Low season: May through October.

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Climate source: Meteorological data for Siem Reap is based on weather statistics gathered for the period 2012 to 2021 by the Cambodia Meteorological Department at the closest weather station, including the former Siem Reap International Airport (REP), located 8km (5mi) from Siem Reap, as well as from the new Siem Reap–Angkor International Airport (SAI), located about 45km (28mi) east of Siem Reap and 50km (30mi) east of Angkor Wat.

Advice on the best time to visit Siem Reap is based on average local weather statistics, when the weather conditions are generally better than at other times of the year. We consider high and low temperatures, risk of rain (and thunderstorms, etc.), amount of sunshine and sea temperature. For general outdoor activities we favour clear, rainless days with a temperature range between 18°C (64°F) and 27°C (80°F); and for hot-weather activities we favour clear, rainless days with a temperature range between 24°C (75°F) and 32°C (89°F). Often, the best times to visit correspond to high season and therefore involve higher prices.

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Latest update: Best time to visit Siem Reap: 15 August, 2025

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Disclaimer: The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data and conditions at any given location and time are unpredictable and variable. We assume no responsibility and can not be held legally responsible for any decisions made on the basis of the information presented on this site.

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