Best time to visit Siem Reap
The best months to visit Siem Reap are December, January and November, based on month-by-month temperature and rainfall data. The full year of weather, daylight, holidays, and festival timing is below.
December, January and November score best for Siem Reap weather:
- January31° / 22°CJanuary is dry and busy, excellent for Angkor sunrise starts and Tonle Sap trips.
- November30° / 23°CNovember turns drier, making Angkor loops easier and visitor numbers rise.
- December30° / 22°CDecember is dry and peak season, with comfortable mornings and crowded sunrise spots.
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By TripSapien Research · Updated May 20, 2026
Siem Reap weather by month
| Month | High | Low | Rain (mm) | Rainy days | Daylight |
|---|---|---|---|---|---|
| JanuaryBest weather | 31° | 22° | 10 | 2 | 11h |
| February | 32° | 24° | 15 | 2 | 12h |
| March | 33° | 26° | 59 | 6 | 12h |
| April | 34° | 26° | 100 | 11 | 12h |
| May | 32° | 26° | 157 | 16 | 13h |
| June | 32° | 26° | 137 | 15 | 13h |
| July | 31° | 26° | 142 | 16 | 13h |
| August | 31° | 26° | 169 | 17 | 12h |
| September | 30° | 25° | 254 | 18 | 12h |
| October | 30° | 24° | 230 | 17 | 12h |
| NovemberBest weather | 30° | 23° | 68 | 7 | 11h |
| DecemberBest weather | 30° | 22° | 17 | 2 | 11h |
Temperatures in °C. Long-term monthly averages.
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Siem Reap month by month
JanuaryBest weather
Siem Reap in January: 30.6°C high, 22.1°C low, 10mm rain over 2 days, 11.3h daylight. Hot and dry — outdoor friendly, hydrate.
February
Siem Reap in February: 32.2°C high, 23.6°C low, 15mm rain over 2 days, 11.6h daylight. Hot and dry — outdoor friendly, hydrate.
The Annual Street Puppet Festival
March
Siem Reap in March: 33.4°C high, 25.5°C low, 59mm rain over 6 days, 11.9h daylight. Hot and dry — outdoor friendly, hydrate.
April
Siem Reap in April: 33.6°C high, 26.3°C low, 100mm rain over 11 days, 12.3h daylight. Hot and rainy — afternoon storms, plan indoor afternoons.
May
Siem Reap in May: 32.4°C high, 26.3°C low, 157mm rain over 16 days, 12.6h daylight. Hot and rainy — afternoon storms, plan indoor afternoons.
June
Siem Reap in June: 31.8°C high, 26°C low, 137mm rain over 15 days, 12.8h daylight. Hot and rainy — afternoon storms, plan indoor afternoons.
July
Siem Reap in July: 31.3°C high, 25.7°C low, 142mm rain over 16 days, 12.7h daylight. Hot and rainy — afternoon storms, plan indoor afternoons.
August
Siem Reap in August: 31°C high, 25.5°C low, 169mm rain over 17 days, 12.4h daylight. Hot and rainy — afternoon storms, plan indoor afternoons.
September
Siem Reap in September: 30.3°C high, 25°C low, 254mm rain over 18 days, 12.1h daylight. Hot and rainy — afternoon storms, plan indoor afternoons.
October
Siem Reap in October: 30.1°C high, 24.4°C low, 230mm rain over 17 days, 11.7h daylight. Hot and rainy — afternoon storms, plan indoor afternoons.
The Water Festival
NovemberBest weather
Siem Reap in November: 30.1°C high, 23.3°C low, 68mm rain over 7 days, 11.4h daylight. Hot and dry — outdoor friendly, hydrate.
Angkor Photography Festival: Photography for Change · The Water Festival
DecemberBest weather
Siem Reap in December: 29.8°C high, 21.8°C low, 17mm rain over 2 days, 11.2h daylight. Hot and dry — outdoor friendly, hydrate.
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