The best times to visit Siem Reap for ideal weather are
October 29th to July 1st
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Siem Reap Travel Guide
Weather in Siem Reap
Average temperatures in Siem Reap vary very little. Considering humidity, temperatures feel hot all year with a very low chance of rain throughout the year. The area is less temperate than some — in the 30th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Siem Reap, the hottest months are April, May, and then March. See average monthly temperatures below. The warmest time of year is generally mid April where highs are regularly around 97°F (36.1°C) with temperatures rarely dropping below 79.8°F (26.6°C) at night.
Siem Reap Temperatures (Fahrenheit)
Siem Reap Temperatures (Celsius)
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
Siem Reap Perceived Temperature (F)
Siem Reap Perceived Temperature (C)
Average Siem Reap Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Siem Reap are January, February, and then December. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early January. For example, on the week of January 1st there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late August to early September with an average of 2 days of significant precipitation the week of August 27th.
When can you find snow in Siem Reap? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
The graph below shows the % chance of rainy and snowy days in Siem Reap.
Snow on the Ground
The graph below shows the average snow on the ground in Siem Reap (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
Siem Reap has some very humid months, with other comfortably humid months. The least humid month is March (51.3% relative humidity), and the most humid month is September (72%).
Wind in Siem Reap is usually calm. The windiest month is July, followed by June and August. July’s average wind speed of around 5.1 knots (5.9 MPH or 9.5 KPH) is considered “a light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in mid June where average top sustained speeds reach 13.6 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Siem Reap.
The graph below shows wind speed (max and average) in knots.
Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
|Month||Avg. Wind||Avg. Wind Feel||Sustained High Wind||High Wind Feel|
|Jan||4||Light breeze||8.6||Gentle breeze|
|Feb||4.1||Light breeze||9.1||Gentle breeze|
|Mar||4.4||Light breeze||9.6||Gentle breeze|
|Apr||4.3||Light breeze||10.2||Gentle breeze|
|May||4.5||Light breeze||12.1||Gentle breeze|
|Jun||4.9||Light breeze||13||Significant breeze|
|Jul||5.1||Light breeze||13||Gentle breeze|
|Aug||4.7||Light breeze||11.7||Significant breeze|
|Sep||4.4||Light breeze||10.5||Gentle breeze|
|Oct||3.7||Barely noticeable||9.2||Gentle breeze|
|Nov||3.6||Barely noticeable||8.3||Gentle breeze|
|Dec||3.5||Barely noticeable||8||Gentle breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Siem Reap?
Our best data indicates this area is somewhat safe. As of Aug 21, 2019 there are travel warnings for Cambodia; exercise a high degree of caution. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Aug 14, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Siem Reap, Cambodia is January, followed by July and May. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Siem Reap in August. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
Overall Siem Reap Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel very warm. Highs range from 97°F (36.1°C) and 92.8°F (33.8°C) with similar temperatures in the later months. Rain is nonexistent with roughly 0 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.
Summer (June through August)
The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see moderate precipitation with 1 to 4 days of precipitation per month. June – August is fairly slow season for tourism in Siem Reap, so lodging and other accommodations may cost slightly less.
Fall (September through November)
Fall daily highs range from 89°F (31.7°C) and 87.3°F (30.7°C), which will feel very nice given the humidity and wind. It rains or snows a normal amount: 0 to 6 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.
Winter (December through February)
Weather is perfect this time of year in Siem Reap to be enjoyable for warm weather travelers. The average high during this season is between 92.8°F (33.8°C) and 85.8°F (29.9°C). On average, it rains or snows a insignificant amount: consistently 0 times per month. These times of year are the busiest with tourists.