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Siem Reap Weather Overview

Siem Reap is a city located in the northwestern part of Cambodia, famous for its ancient temples and ruins of the Khmer Empire. Before planning your trip to Siem Reap, it's important to understand the weather patterns throughout the year to ensure you have the best experience possible. In this guide, we'll take a closer look at the weather in Siem Reap throughout the year, including average temperatures, rainfall, and other important factors.

The Seasons in Siem Reap

The climate of Siem Reap is tropical, with hot and humid weather throughout the year. The city experiences two distinct seasons - the dry season and the rainy season. The dry season lasts from November to April, while the rainy season spans from May to October. The dry season is characterized by hot and sunny weather, making it the best time to visit the city. On the other hand, during the rainy season, Siem Reap receives heavy rainfall, which can sometimes cause flooding in the city. Here's a closer look at what you can expect during each season:

Siem Reap Weather Overview

Dry Season: Sunny & Pleasant

  • Period: Nov - Apr
  • Average Temperature: 21-32°C (70-90°F)
  • Humidity Level: 50-60%
  • Average hours of sunshine per day: 9 hours

During these months, Siem Reap experiences its dry season, with low humidity and minimal rainfall. The temperatures are comfortable, averaging around 25-30°C (77-86°F) during the day and dropping to around 18-20°C (64-68°F) at night. This is considered the peak tourist season, so expect larger crowds and higher prices for accommodations and tours.

Best things to do

  • Visit Angkor Wat and explore other temples
  • Take a hot air balloon ride
  • Take a boat tour around Tonle Sap Lake
  • Enjoy outdoor activities: cycling, hiking, and zip-lining
  • Indulge in local cuisine.
What to pack
During the dry season, it's a good idea to pack lightweight clothing such as shorts, t-shirts, and sundresses. You may also want to bring a light jacket or sweater for cooler evenings.
Siem Reap Dry Season

Rainy Season: Hot & Humid

  • Period: May-Oct
  • Average Temperature: 28-32°C (82-90°F)
  • Humidity Level: 60-80%
  • Average hours of sunshine per day: 9 hours

As the dry season comes to an end, temperatures begin to rise, and the humidity increases. April is the hottest month of the year, with temperatures reaching up to 40°C (104°F). May and June are still hot but slightly cooler, with average temperatures around 30-35°C (86-95°F) during the day and around 25°C (77°F) at night. This is also the beginning of the rainy season, so expect occasional afternoon showers.

The months from Jul - Oct are considered the wettest time of the year in Siem Reap, with heavy rainfall and high humidity. Temperatures remain relatively constant, with average highs around 30-33°C (86-91°F) and lows around 24-26°C (75-79°F). While it can rain heavily at times, the rain usually comes in short bursts and is followed by periods of sunshine. While the rain can put a damper on outdoor activities, the lush greenery and fewer crowds make it a great time to explore the temples.

Best things to do

During the rainy season, you may want to check out some of the city's indoor attractions, such as the Angkor National Museum or the Artisans Angkor Workshop. You can also take advantage of the cooler temperatures and lush greenery by exploring some of the city's parks and gardens.

What to pack

During the rainy season, it's important to pack rain gear such as a waterproof jacket or poncho, as well as waterproof shoes or sandals. It's also a good idea to bring insect repellent, as mosquitoes can be more prevalent during the rainy season.

Siem Reap Rainy Season

Siem Reap Monthly Temperature & Rainfall Averages

The best time to visit Siem Reap is from November to February, when the weather is dry and cool. During this time, the temperature is around 25-30°C (77-86°F) and there is little rainfall, making it perfect for exploring the temples of Angkor Wat and other outdoor activities. From March to May, the weather becomes hot and humid with temperatures reaching up to 40°C (104°F), making it less comfortable for outdoor activities. From June to October, it is the rainy season in Siem Reap, with heavy rainfall and occasional flooding, which may affect your travel plans.

Check out our general statistics to anticipate the best time to visit Siem Reap.

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Average Maximum Average Minimum Average Rainfall
January 30°C 18°C 11 mm
February 33°C 21°C 15 mm
March 34°C 24°C 20 mm
April 35°C 25°C 60 mm
May 34°C 25°C 155 mm
June 32°C 24°C 185 mm
July 32°C 24°C 205 mm
August 32°C 24°C 240 mm
September 31°C 24°C 280 mm
October 30°C 23°C 238 mm
November 30°C 20°C 85 mm
December 30°C 18°C 15 mm

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