Is the weather good in Cambodia in December 2025?
For the past few decades, the average daily temperatures in Cambodia during December have been around +31°C.
In Cambodia the temperature rarely varies more than seven degrees between the different parts with the highest temperature +31°C in Phnom Penh to +30°C in Siem Reap. So you should be able to pack for similar conditions wherever you go in the country.
Temperature, wind and humidity in December
- rainiest? Phnom Penh, with an average of 1 mm of rain and humidity of 70%;
- warmest? Phnom Penh, with daytime temperatures averaging +31°C;
- windiest? Phnom Penh, with an average of 2 m/s;
- coolest? Siem Reap, with daytime temperatures averaging +30°C;
How good is the weather in Cambodia in December?
How warm is it in Cambodia during December?
This is how hot it usually is in December
- Average maximum temperature for the month: +30°C;
- Average minimum temperature for the month: +22°C;
- Highest monthly temperature: +31°C;
- Lowest monthly temperature: +21°C;
Monthly temperatures:
- Warmest: April with an average +36°C during the day;
- Coldest: October with an average +31°C of the day;
- Hottest month in hottest city: April in Phnom Penh;
- Coldest month in coolest city: December in Siem Reap;
Winds in Cambodia during December
December tends to offer light winds averaging 2 m/s. However, coastal cities may experience breezes during the mornings and afternoons.
Comparison between cities in December:
- Highest average wind speed: Phnom Penh with 2 m/s;
- Lowest average wind speed: Siem Reap with 1 m/s;
- Windiest day of the month: Phnom Penh with 3 m/s;
- The least windy day of the month: Siem Reap with 1 m/s;
Humidity and precipitation in Cambodia in December
Comparison between cities in December:
- Highest average rainfall: Phnom Penh with 24 mm;
- Lowest average rainfall: Siem Reap with 13 mm;
- Most number of rainy days: Phnom Penh with 7 rainy days;
- Least number of rainy days: Siem Reap with 6 rainy days;
- Highest risk of rain during the day: Phnom Penh with 23%;
- Least risk of rain during the day: Siem Reap with 19%;
- Highest average humidity: Siem Reap with 72%;
- Lowest average humidity: Phnom Penh with 70%;
Tips for traveling to Cambodia in December
Looking for some tips for traveling to the sun, snow, or whatever you're aiming for Cambodia? Activities, weather, and clothing are closely linked. In addition, it's important to pack only what you really need so you don't have to worry about heavy packing or paying extra baggage fees.
Here is some advice on what to pack and what kind of activities you can do in the Cambodia based on the weather that December is expected to bring. The advice applies to the country as a whole – local weather and possible activities may differ somewhat.
Pack right for December
- For light showers, an umbrella or a thin and light rain cape is usually sufficient, while more rain may require rainwear and rain boots.
- Long, hot days bring risks - weather like this is one of the most challenging things we can do to our bodies. It's best to avoid going to Cambodia when it's so hot. Secondly, keep cool by staying in the shade, the pool or in an air-conditioned room. Pack clothes for the sun, for swimming but also for hydration.
- Light winds are probably most comfortable in hot weather but is cooling in cool and cold weather. If it is hot (when the air temperature is about 30 degrees), the wind can have a warming effect. A thin, windproof jacket and long trousers help to counteract these effects.
- High humidity means that the air conducts heat to and from the skin more easily. For example, if the air is hot (above skin temperature), it will be harder to stay cool. On the other hand, if the air is cool or cold, it is more difficult to stay warm. In high humidity, the choice of clothing makes less of a difference. However, your physical activity plays a bigger role.
FAQ
What can you do outside when it's warm in Cambodia?
Is December a good time to visit Cambodia?
Monthly weather in Cambodia
Source of the data
For this page, we’ve looked at the typical weather in Cambodia, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
