Phnom Penh weather in December falls within the city’s dry season, offering generally warm days, limited rainfall and comfortable conditions for exploring outdoor sights. Travelers typically find daily temperatures around the mid-to-high 20s°C, with humidity that can still feel noticeable.
What Phnom Penh weather in December is like
December is part of Phnom Penh’s dry period, which commonly runs from November through May. Compared with the monsoon months, rainfall is substantially reduced in December, so outdoor activities and walking tours are less likely to be disrupted by storms.
Typical daytime temperatures in December tend to sit between the mid-20s and around 30°C, with cooler nights closer to the low 20s. Average relative humidity in this month is reported at roughly 71%, and monthly rainfall is low—around 10 mm—meaning only a small number of wet days are expected.
Key features and highlights of December weather
One of the main advantages of visiting in December is the lower chance of rain compared with the wet season. This weather profile suits daytime exploration of riverside promenades, open-air markets and temple sites located within or near the city.
At the same time, December remains comfortably warm for much of the day. Visitors should note that humidity levels, although lower than during the monsoon, can still make midday periods feel sticky; sun protection and hydration are therefore worthwhile precautions.
- Low monthly rainfall—generally only a few wet days.
- Average highs near 28–30°C and lows around 22°C.
- Moderate-to-high humidity despite reduced rain.
- Increased visitor numbers during the holiday season, so advance bookings are common.
Practical tips for traveling to Phnom Penh in December
Because December is a popular time to travel in Cambodia, many visitors choose to make reservations for accommodation and transport in advance. Booking early helps secure preferred hotels and travel times during this busier period.
Packing should balance warm daytime conditions with cooler evenings: lightweight breathable clothing, a sun hat, sunscreen and a refillable water bottle are essential. A light layer or shawl can be useful for air-conditioned indoor spaces and slightly cooler nights.
- Reserve hotels and major transport ahead of time to avoid sold-out options.
- Bring sun protection and stay hydrated during midday heat.
- Keep valuables secure when using public vehicles and markets.
- Carry modest clothing for visits to religious or government sites.
For visitors planning cross-border or multi-country travel, consider reading a practical overview on planning a first trip that includes nearby countries. And for handling cash while in the city, consult a concise guide to money and currency to understand the mixed use of US dollars and the local riel.
Cultural context and seasonal events
December sits within a period when many public celebrations and cultural activities can take place with fewer weather interruptions than in the monsoon months. Festivals and events that depend on dry conditions are often scheduled during this stretch of the year, bringing added activity to markets and public areas.
Visitors should keep in mind that popular public spaces and tourist attractions may be busier than during quieter parts of the year. Advance planning for entry times, transport and dining can reduce wait times and allow for a more relaxed schedule.
- Expect higher footfall at major sites and dining areas during peak holiday dates.
- Book guided tours or timed visits in advance when possible.
- Respect local customs and dress codes at religious sites.
Who benefits most from visiting Phnom Penh in December
The conditions in December suit travelers who prefer to do outdoor sightseeing with a lower risk of rain. People planning riverside walks, open-air markets, temples and street-food exploration usually find the weather accommodating.
Families, first-time visitors, and those on short trips often favor this month because the generally dry conditions reduce the chance that weather will force cancellations or major itinerary changes. Conversely, travelers seeking quieter, less crowded experiences might consider shoulder months outside major holiday periods.
Comparisons and alternatives
To decide whether December is the optimal month, it helps to compare it with other parts of the year. The wet season (roughly June to October) brings heavier rain and reduced outdoor access, while the hot-dry months (March–May) can produce higher daytime temperatures and more intense heat.
Visitors who prefer cooler temperatures and fewer tourists might consider visiting slightly outside the main holiday period. However, December generally offers a balance of manageable weather and accessibility to outdoor attractions.
| Month/Season | Rainfall | Typical Temps | Crowds |
|---|---|---|---|
| December (dry season) | Low (around 10 mm monthly) | Mid-20s to ~30°C | High during holidays |
| July (monsoon peak) | High (frequent heavy showers) | Mid-20s to high-20s°C | Lower than December |
| April (hot-dry) | Low | Often hottest—high 30s possible | Moderate |
Frequently Asked Questions
Is December generally a good month to visit Phnom Penh?
Yes. December falls within the dry season, so rainfall is typically low and conditions favour outdoor activities. Many travelers choose this month for sightseeing and markets, though it can be busy around holiday dates.
How hot does Phnom Penh get in December?
Daily temperatures in December commonly range from the low 20s°C at night to the upper 20s°C during the day. Expect warm days with occasional periods that feel quite warm in direct sun.
Will I need rain gear in December?
Rain is less likely in December than during the monsoon, but brief showers can still occur. A compact umbrella or a lightweight packable rain jacket is a reasonable precaution.
Are public services and attractions affected by the season?
Most attractions operate as usual in December. Because this is a peak travel period, services such as hotels and popular tours may book up earlier, so advance reservations are recommended.
What should I pack for a December visit?
Pack light, breathable clothing for daytime, plus a light layer for evenings and air-conditioned interiors. Include sun protection, refillable water, secure bags for personal items and modest clothing for visits to religious sites.