SeasonMapCambodia in December
December is one of Cambodia's best months (rank 2 of 12): its 7 destinations average 84/100, led by Kep at 90 — 29°C and 7 rainy days — while Phnom Penh is warmer at 33°C and scores 79.
#2 of 12 months for Cambodia · 7 destinations · updated September 2026 · climate normals from ERA5 reanalysis
Where in Cambodia in December
| # | Place | Type | Feels-like high | Rain | Comfort | At its best |
|---|---|---|---|---|---|---|
| 1 | Kep | Beach | 29°C | 32 mm · 7 days | 90 tier S | Yes |
| 2 | Koh Rong | Island | 30°C | 43 mm · 8 days | 90 tier S | Yes |
| 3 | Sihanoukville | Beach | 30°C | 64 mm · 10 days | 89 tier A | Yes |
| 4 | Battambang | City | 30°C | 17 mm · 4 days | 83 tier A | Yes |
| 5 | Siem Reap | City | 33°C | 20 mm · 4 days | 82 tier A | Yes |
| 6 | Phnom Penh | City | 33°C | 27 mm · 4 days | 79 tier B | Yes |
| 7 | Kampot | City | 30°C | 32 mm · 7 days | 78 tier B | Yes |
Comfort is SeasonMap's 0–100 score; each place is judged through the lens that suits it — beaches on beach weather, ski resorts on snow. "At its best" means December is one of that place's own top three months. Feels-like highs fold in humidity, wind and sun.
What's on in Cambodia in December
- Angkor Wat Half Marathon · Siem Reap · 6 Dec
- Bioluminescent plankton · Koh Rong · 1 Nov – 31 Mar (usually)
- Rice harvest on the plain · Battambang · 15 Nov – 31 Jan (usually)
- Salt harvest on the flats · Kampot · 15 Dec – 15 May (usually)
Seasons in force
Peak crowds at 1 of Cambodia's 2 well-known places this month.