Siem Reap weather
Loading live data…Latest for Siem Reap: European (ECMWF): 30° Clear · American (NOAA GFS): 28° Overcast · German (DWD ICON): 28° Mainly clear.
The weather map: all three models at once
European, American, German side by side around Siem Reap and nearby towns.Live rain radar →Hourly forecast: next 14 hours
consensus of the three modelsRain in the next 24 hours, model by model
each model's own hourly precipitation, side by sideLoading the three models…
10-day forecast, out to 14 days
where the models agree, and where they splitHeading to Siem Reap? Siem Reap, Cambodia, sits at 13.4°N in a tropical climate zone. Before you lock in outdoor plans, compare how the three global models - European (ECMWF), American (GFS) and German (ICON) - forecast Siem Reap right now. Where they agree you can trust it; the days they split are exactly when a single weather app is least reliable. For a city break, the rain hours below tell you which days to plan indoors.
Best time to visit Siem Reap
Siem Reap is warm year-round. Even January stays mild (lows near 20°C), so the main thing to plan around is the September wet season.
Siem Reap weather by month
what to expect in Siem Reap through the year, 1991-2020 averagesHere is Siem Reap's typical weather in each month: the average daytime high and overnight low in °C, how each month feels, and the wettest month marked. Use it to plan any trip to Siem Reap by season.
Siem Reap compared with Sydney
30-year averages: daytime highs month by month, rain and sunlightWarmer through the year
average daytime high: Siem Reap 32°C, Sydney 23°C
Rain over a year
Siem Reap 1,437 mm, Sydney 1,148 mm
Sunlight vs a clear sky
solar energy reaching the ground as a share of a cloudless day, averaged over the year (not sunshine hours)
On 30-year averages Siem Reap runs 9°C warmer than Sydney, with every month between +3°C and +15°C. Over a year it gets 25% more rain than Sydney.
Month by month in numbers
| Month | Siem Reap | Sydney | Difference | Sunlight, Siem Reap | Sunlight, Sydney |
|---|---|---|---|---|---|
| January | 30°C | 27°C | +3°C | 91% | 75% |
| February | 32°C | 28°C | +4°C | 92% | 73% |
| March | 34°C | 26°C | +8°C | 88% | 75% |
| April | 36°C | 24°C | +12°C | 87% | 77% |
| May | 34°C | 22°C | +12°C | 82% | 79% |
| June | 33°C | 18°C | +15°C | 78% | 74% |
| July | 31°C | 18°C | +13°C | 75% | 80% |
| August | 32°C | 20°C | +12°C | 73% | 82% |
| September | 31°C | 22°C | +9°C | 72% | 82% |
| October | 31°C | 24°C | +7°C | 79% | 77% |
| November | 31°C | 25°C | +6°C | 85% | 74% |
| December | 30°C | 27°C | +3°C | 89% | 74% |
Daytime highs and lows on this page are 1991-2020 averages. Siem Reap: no weather station within 30 km at a similar height, so lows are ERA5 point values for 2023-2024, corrected month by month by NASA POWER's difference between those two years and 1991-2020, and highs are the uncorrected ERA5 values, which tested closer to station normals; rain is the CHELSA 1981-2010 climatology on a 1 km grid. Sydney: station normals from Sydney Observatory Hill (WMO), rain included. Sunlight vs a clear sky is NASA POWER's long-term average of the solar energy reaching the ground as a share of a cloudless day; it compares cloudiness and is not a count of sunshine hours. Sydney stands in for Australia here; other cities have their own climate tables.