Siem Reap weather in December
Monthly temperatures, rain, humidity, what to wear and what to pack — 2024–2025 historical average
Siem Reap December weather at a glance
In December, Siem Reap averages 25.8°C, with typical highs of 30.7°C and lows of 21.7°C. The historical average is 6 wet days and 70% humidity.
Siem Reap December temperature & humidity
Siem Reap December rain & wet days
Pack a compact umbrella. Keep an indoor stop available between outdoor activities.
What to wear in Siem Reap in December
Expect intense heat. Pack lightweight quick-dry clothing, sun protection and a refillable bottle.
- DaytimeBreathable short sleeves, hat and sunscreen · average high 30.7°C
- Morning & eveningLight layer for air-conditioned rooms · average low 21.7°C
- FootwearComfortable walking shoes; quick-dry footwear for rainy days.
Packing essentials
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Siem Reap December sunrise & sunset times
2026 December · Local time (Asia/Phnom_Penh)
| Date | Sunrise | Sunset | Daylight |
|---|---|---|---|
| 2026-12-01 | 06:11 | 17:35 | 11h 24m |
| 2026-12-15 | 06:19 | 17:40 | 11h 21m |
| 2026-12-31 | 06:27 | 17:48 | 11h 21m |
For sunset photos, arrive before the listed sunset time. Clouds, mountains and buildings can change when the sun becomes visible or disappears.
Calculated for the city coordinates with daylight saving applied. SunCalc · tz-lookup
Siem Reap travel updates
Watch live CCTV
No public camera link is available for this destination yet. Check the weather or map instead.
Today’s weather and forecast
Check temperature, rain and wind in Windy.
Forecast · Windy. Monthly averages are in the Temperature section.
Siem Reap news search
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Siem Reap city map
This map shows the city area, not a specific meeting point.
Siem Reap rainy season & dry season
Is December wet or dry?
The 2024–2025 average for December is 6 wet days.
2024–2025 wet-day averages, not long-term season boundaries. Wet days do not mean all-day rain.
Packing for rainy and dry periods
For rainy periods, bring a light rain jacket, a waterproof pouch and quick-dry clothes. In drier months, pack sunscreen and a hat, plus a compact umbrella for showers. For beach trips, check the boat operator’s weather and cancellation notices.
Siem Reap travel essentials
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Best months to visit Siem Reap
Bar height shows our simple weather-comfort score, not a safety rating; colour shows temperature.
December weather by year
Daily weather in 2025
Daily high and low temperatures; blue labels show precipitation
Frequently asked questions
What is Siem Reap weather like in December?
In December, Siem Reap averages 25.8°C, with typical highs of 30.7°C and lows of 21.7°C. The historical average is 6 wet days and 70% humidity. Our weather-comfort rating for this month is good.
Does it rain a lot in Siem Reap in December?
There are about 6 wet days in December. A compact umbrella is still useful.
What should I wear in Siem Reap in December?
Expect intense heat. Pack lightweight quick-dry clothing, sun protection and a refillable bottle.
What are the best months to visit Siem Reap?
Recent weather data rates January, February, December among the more comfortable months.
Where can I check Siem Reap weather in December in real time?
Check local webcams for the view right now and a local weather service for today’s forecast. Monthly temperatures here are historical averages.
Is December rainy or dry season in Siem Reap?
The 2024–2025 average for December is 6 wet days.
Which months have fewer rainy days in Siem Reap?
In our 2024–2025 data, January, February, December have the fewest wet days. These are recent observations, not long-term climate normals. Compare temperatures and your planned activities as well.
What time are sunrise and sunset in Siem Reap in December?
On 2026-12-15, calculated sunrise is 06:19 and sunset is 17:40 in local time (Asia/Phnom_Penh). Times vary by date and terrain.
Siem Reap weather by month
More Southeast Asia destinations in December
Open-Meteo (CC BY 4.0) · 2024–2025 historical data, aggregated and rounded by this site. Not a forecast or long-term climate normal. Calculation method and limitations