Phnom Penh Weather in December
December in Phnom Penh averages 33°C (91°F) during the day and 23°C (73°F) at night. The excellent conditions and low rainfall make it a solid month to visit.
Rainfall in Phnom Penh in December
Typically, you can expect about 4 days of rain this month, with 29 mm (1.1 in) on average. The occasional light shower is possible, but rain is rarely an issue this month.
Temperature in Phnom Penh in December
The temperature in Phnom Penh in December is excellent. Daytime highs reach 33°C (91°F), with nights dropping to 23°C (73°F). Sunshine and humidity can make it feel even warmer than the raw temperature suggests. With overnight lows of 23°C (73°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably. This month is known for milder temperatures, yet warmth continues to be a defining feature.
Sunshine in Phnom Penh in December
There are approximately 244 hours of sunshine this month, resulting in mostly clear days.
Wind Speed in Phnom Penh in December
December has wind speeds averaging 3 m/s (6 knots). You can expect comfortable light winds that steadily move flags and feel mild throughout the day. Since this is an average, daily conditions vary from gentle winds to more active breezes.If you're a fan of comfortable temperatures and drier conditions, December is a great time to visit.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Cambodia, check out our Phnom Penh's climate page.
Phnom Penh Temperature in December
Min Temperature
23°C (73°F)
Max Temperature
33°C (91°F)
Chance of Rain
14%
Precipitation
29 mm (1.1 in)
Rainy days
4 days
Humidity
73%
Windspeed
3 m/s (6 knots)
Sunshine
244 hours
Percentage Sunshine
Daily Historical Temperatures
31-year average (1994-2025)
Based on our historical records, temperatures in Phnom Penh typically stay consistent throughout December, with daily highs averaging around 33°C (91°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in December
Historical weather for Phnom Penh in December
Browse day-by-day weather records for Phnom Penh spanning 38 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Phnom Penh historical weather extremes in December
The extremes listed below come from historical weather data collected in Phnom Penh from 2003 through 2025.
- On December 14, 2012, temperatures climbed to 39°C (102°F), marking the warmest December day on record.
- Phnom Penh experienced its chilliest December day on December 21, 2017, reaching only 23°C (73°F).
- Nighttime temperatures dropped to 18°C (64°F) on December 19, 2017, marking the coldest December night on record.
Best Places in Cambodia in December
Find out more about the weather in Cambodia and which places have the best travel conditions in this month. See all of Cambodia in December →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Phnom Penh in December
Warm temperatures in December make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Pack a light rain jacket or compact umbrella for occasional showers. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Phnom Penh in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Cambodia, check out our Phnom Penh's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Phnom Penh climate overview or explore weather in Cambodia.
