What to expect in Siem Reap in May
May is a mixed month in Siem Reap. You get 35° / 24°, but manageable crowds at the big attractions. Worth it for the right traveller.
Siem Reap weather in May
Typical conditions in Siem Reap during May, based on long-run climate normals rather than any single year. Treat it as a planning guide, not a forecast.
| Average high | 35°C 95°F |
|---|---|
| Average low | 24°C 75°F |
| Rainfall | Wet 60/100 |
| Total rainfall | 143 mm5.6 in |
| Daylight | 12 h 45 min |
| How it feels | Hot — midday shade matters |
Average highs sit around 35°C with lows near 24°C. Expect a fair amount of rain, so plan indoor backups.
Crowds & demand
Crowd levels are Low for Siem Reap — plenty of space at the main sights.
Prices & value
This month counts as low season: some of the best deals of the year.
What to pack
Lightweight, breathable clothes, strong sun protection and a refillable bottle — highs near 35°C make midday heat the main constraint. Add a compact rain shell and shoes you do not mind soaking; this is one of the wetter months.
What it costs
This is one of the cheaper months to visit Siem Reap. Flights and accommodation sit near their yearly floor, and you can usually book late without being punished for it. Compared with the most expensive month of the year, you are looking at roughly 59% less.
Who this month suits
- Anyone travelling on a budget
- People who would rather have space than perfect conditions
Events & what’s on
No major festivals fall in May, so the destination feels like its everyday self.
Siem Reap in May compared with nearby months
If your dates are flexible by a few weeks, this is what shifting them actually buys you.
| Month | Temp | Crowds | Price | Score |
|---|---|---|---|---|
| March | 35° / 23° | Moderate | $$ | 53 |
| April | 36° / 24° | Moderate | $$ | 56 |
| May · This month | 35° / 24° | Low | $ | 60 |
| June | 33° / 24° | Low | $ | 63 |
| July | 32° / 24° | Low | $ | 63 |
These months score higher for Siem Reap on the same blend of weather, crowds and price. Same destination, better odds.
Or go somewhere else in May
If the destination is negotiable but the month is not, these places are at their best in May.
Figures are climate normals and modelled estimates — a planning guide, not a forecast. We separate fact, estimate and recommendation. Updated October 2026
