Siem Reap · WinterMonth summary
Siem Reap weather in December
✅ Good
🌡️ Temperature min / max
22°C – 30°C
🌧 Rainy days
15% of days
☀️ Sunshine
10.1h per day on average
🌊 🌊 Season
Winter
⭐ ⭐ Weather score
8.3/10
📅 📅 Best month
January (8.3/10)
Quick decision
Should you visit Siem Reap in December?
✅ Good
✅ Yes if: you're looking for maximum sunshine — 10.1h per day on average.
❌ No if: you struggle with heat — temperatures regularly exceed 30°C.
Our take: December is a good time to visit Siem Reap. January remains slightly better (+0.0 pts).
By trip type
Siem Reap in December by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ✅ Good
- 🏖️ Beach / swimming : ✅ Good
- 💰 💰 Budget : 💸 Peak season
Local context
What to expect in December
🎯 Peak season — book ahead for best rates. Accommodation prices at their highest Even in winter, Siem Reap enjoys 30°C. A real asset for escaping the European cold. Rain risk remains low (15% of days), leaving good room for outdoor activities. A good balance between weather and crowds, even if January (8.3/10) remains theoretically better.
Browse by month
All months for Siem Reap
Annual table
Month-by-month comparison
| Month | Min °C | Max °C | Rain % | Precip mm | Sun h/d | Score |
|---|---|---|---|---|---|---|
| ☀️ January | 22°C | 31°C | 7% | 0.5 | 10.5h | 8.3/10 |
| ☀️ February | 23°C | 32°C | 15% | 0.9 | 10.8h | 8.0/10 |
| 🌤️ March | 25°C | 34°C | 35% | 1.9 | 11.0h | 7.1/10 |
| 🌤️ April | 26°C | 34°C | 47% | 3.4 | 11.5h | 7.0/10 |
| ⛅ May | 26°C | 33°C | 77% | 7.0 | 11.0h | 6.1/10 |
| ⛅ June | 26°C | 32°C | 76% | 5.3 | 10.4h | 7.0/10 |
| 🌧️ July | 26°C | 32°C | 85% | 7.1 | 9.2h | 5.8/10 |
| 🌧️ August | 25°C | 32°C | 81% | 6.9 | 9.5h | 6.2/10 |
| 🌧️ September | 24°C | 31°C | 91% | 11.3 | 8.6h | 5.5/10 |
| ⛅ October | 24°C | 31°C | 75% | 8.1 | 9.7h | 7.0/10 |
| 🌤️ November | 23°C | 31°C | 45% | 3.5 | 10.3h | 7.4/10 |
| ☀️ December | 22°C | 30°C | 15% | 1.0 | 10.1h | 8.3/10 |
Ideal
Fair
Challenging climate
◀ Current month · Source Open-Meteo · 10 years
📊 Data source
Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In December, Siem Reap averages 30°C, 15% rainy days and 10.1h of sunshine per day. Overall weather score: 8.3/10.
See methodology →
Comparison
December vs January (best month)
The best month is January (score 8.3/10). Difference:
- 🌡️ Max temperature : +1°C
- 🌧 Rainy days : -8%
- ☀️ Sunshine : +0.4h/day
FAQ
FAQ — Siem Reap in December
Is December a good time to visit Siem Reap?
December is an excellent time to visit Siem Reap (score 8.3/10). With 30°C, 10.1h of sunshine and 15% rain, conditions are very favourable.
Is it too hot in Siem Reap in December?
Temperatures reach 30°C. It's intense but manageable with sunscreen and water. Sunshine: 10.1h/day.
Accommodation
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Activities & tours
Activities and tours in Siem Reap
Guided tours, skip-the-line tickets and local experiences.
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