The short answer
When to go to Siem Reap
The best window is November to February, when the rains have ended, the landscape is green, and days are warm but not punishing. March to May is hot and humid, and the temples are best seen at dawn. June to October is the green season: fewer visitors and lower prices, but frequent downpours, with September the wettest. For older travellers, choose December or January and plan morning temple visits with a long midday rest.
Month by month
Siem Reap weather by month
| Month | High | Low | Rain | Verdict | What to expect |
|---|---|---|---|---|---|
| January | 32°C | 20°C | 4 mm | Dry, cooler mornings; ideal for temples | |
| February | 34°C | 22°C | 5 mm | Dry and warming; clear skies | |
| March | 35°C | 24°C | 29 mm | Hotter; start temple days at dawn | |
| April | 36°C | 25°C | 57 mm | Hottest month; Khmer New Year crowds mid-month | |
| May | 35°C | 25°C | 150 mm | Rains begin; hot and humid | |
| June | 34°C | 25°C | 214 mm | Green season; afternoon downpours | |
| July | 33°C | 25°C | 193 mm | Wet but quieter temples | |
| August | 32°C | 25°C | 209 mm | Frequent rain; fewer visitors | |
| September | 32°C | 25°C | 288 mm | Wettest month; muddy paths, flooded roads | |
| October | 32°C | 25°C | 200 mm | Still very wet; improves late month | |
| November | 31°C | 23°C | 51 mm | Rains end; green landscape, comfortable | |
| December | 31°C | 21°C | 7 mm | Cool, dry; peak season, book early |
Temperatures and rainfall are long-term monthly averages. Check the forecast a few days before you travel.
Seasons at a glance
Siem Reap seasons for families and seniors
The easiest months: January, February, November and December
- January: Dry, cooler mornings; ideal for temples
- February: Dry and warming; clear skies
- November: Rains end; green landscape, comfortable
- December: Cool, dry; peak season, book early
Good, with small trade-offs: March
- March: Hotter; start temple days at dawn
Possible, with planning: April, May, June, July and August
- April: Hottest month; Khmer New Year crowds mid-month
- May: Rains begin; hot and humid
- June: Green season; afternoon downpours
- July: Wet but quieter temples
- August: Frequent rain; fewer visitors
Best avoided with parents or children: September and October
- September: Wettest month; muddy paths, flooded roads
- October: Still very wet; improves late month
Useful answers
Best time to visit Siem Reap: FAQs
What is the best month to visit Siem Reap?
January, February, November and December are the best months to visit Siem Reap, with March also good. The best window is November to February, when the rains have ended, the landscape is green, and days are warm but not punishing. March to May is hot and humid, and the temples are best seen at dawn. June to October is the green season: fewer visitors and lower prices, but frequent downpours, with September the wettest. For older travellers, choose December or January and plan morning temple visits with a long midday rest.
Which months should I avoid in Siem Reap with elderly parents?
September and October are the months to avoid with older travellers. Wettest month; muddy paths, flooded roads Still very wet; improves late month
When does it rain most in Siem Reap?
September is the wettest month, with about 288 mm of rain on average. The hottest month is April, with average highs around 36°C.