Siem Reap (Angkor) weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Excellent
Best time to visit: December – February
What is the weather like in Siem Reap (Angkor) in December?
In December, Siem Reap (Angkor) is hot: daytime highs average 30 °C, and even at night it stays warm at around 22 °C. The sun shines for around 8 hours a day. Rain is rare: about 3 days bring 18 mm in total. On about 15 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, December is an excellent month for a holiday in Siem Reap (Angkor).
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 61 | 81 | 77 |
| Day | 30° | 30° | 31° |
| Night | 24° | 22° | 22° |
| Sun | 8 h | 8 h | 9 h |
| Rain days | 11 | 3 | 2 |
More details for December
- Daylight
- 11 h 21 min06:19 – 17:40
- UV index
- 8 · very highclear sky, noon (estimate)
- Muggy days
- 20 daysdew point 18 °C or more
- Wind
- 15 km/haverage daily peak
- Cloud cover
- 56 %on average
- Hot days
- 15 days30 °C or more
- Time zone
- UTC+7Asia/Phnom_Penh
How the score comes together
- Temperatureweight 50 %66 %
- Sunshineweight 20 %88 %
- Few rainy daysweight 30 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in December
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
Siem Reap (Angkor) in December: quick answers
Is Siem Reap (Angkor) hot in December?
Yes. In December, Siem Reap (Angkor) is hot: daytime highs average 30 °C and nights stay around 22 °C. On about 15 days the thermometer climbs to 30 °C or more.
Does it rain much in Siem Reap (Angkor) in December?
Rain is rare: about 3 days bring 18 mm in total.
Siem Reap (Angkor) month by month
The whole year in Siem Reap (Angkor)All destinations: Cambodia
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)