Cambodia
Siem Reap in September: weather & travel advice
This month's data profile
Rain shapes the decision
Siem Reap in September is climatically mixed. The average daily high is around 30 °C. With about 26 rainy days it is very wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
40/100 · #8
Warmth
#12
Dryness
#12
Sun
#11
Published best categories: none
Siem Reap · SeptemberPhoto: Bahnfrend · CC BY-SA 4.0Climate facts
- Average high
- 30 °C
- Average low
- 24 °C
- Rainy days (est.)
- 26 rainy days (est.)
- Sun (est.)
- 6 h/day
- Humidity
- 87 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Score |
|---|---|---|---|---|---|---|---|---|
| August | 31 | 24 | 25 | 212 | 6.4 | 86 | 1.8 | 39 |
| September (selected) | 30 | 24 | 26 | 240 | 6.0 | 87 | 1.4 | 40 |
| October | 31 | 24 | 19 | 140 | 6.1 | 84 | 1.3 | 43 |
How do the previous and next months compare?
Baseline: September (40/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | |
|---|---|---|---|---|---|---|---|---|
| August | -1 | +0.4 °C | +0.1 °C | -0.8 | -27.9 mm | +0.4 h | -0.9 % | +0.3 m/s |
| October | +3 | +0.5 °C | -0.7 °C | -6.9 | -100.5 mm | +0.1 h | -2.7 % | -0.2 m/s |
All twelve months in context
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Where to stay in Siem Reap
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Useful next decisions
Frequently asked questions
How warm is Siem Reap in September?
The average daily high is around 30 °C, with an average daily low of about 24 °C.
Does it rain a lot in Siem Reap in September?
The curated estimate is about 26 rainy days per month, not a directly measured long-term average. Total precipitation averages around 240 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Siem Reap?
By the climate score, January, February, November and December are the strongest months for Siem Reap. September is not among them.