Asia › Cambodia › Siem Reap
30-year normals (1991-2020)
Siem Reap has a tropical monsoon climate, classified as Am in the Köppen system. The warmest month is March with an average high of 34°C, while the coldest month is January with lows dropping to 21°C. The annual temperature range of 13°C indicates a relatively stable climate year-round.
The driest month is January with only 2 rain days and 8mm of precipitation. For travellers, January through to the following month typically offers the best balance of warm temperatures and dry conditions. Average humidity ranges from 82% to 82% throughout the year.
Based on temperature and rainfall data, the best months to visit Siem Reap are January, December, February. These months offer the most comfortable temperatures with relatively low rainfall, ideal for sightseeing and outdoor activities.
Full Best Time to Visit GuideWarmest Month
34°C
March
Coldest Month
21°C
January
Driest Month
2 days
January
Annual Range
13°C
21° to 34°
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 31°C | 21°C | 2 | 11h | View |
| February | 33°C | 23°C | 3 | 11h | View |
| March | 34°C | 25°C | 9 | 11h | View |
| April | 34°C | 26°C | 15 | 11h | View |
| May | 33°C | 26°C | 22 | 11h | View |
| June | 32°C | 26°C | 21 | 10h | View |
| July | 32°C | 25°C | 22 | 9h | View |
| August | 31°C | 25°C | 25 | 9h | View |
| September | 30°C | 25°C | 26 | 9h | View |
| October | 30°C | 24°C | 23 | 10h | View |
| November | 30°C | 23°C | 9 | 10h | View |
| December | 30°C | 21°C | 3 | 10h | View |
January
2 rain days, 11h sun
February
3 rain days, 11h sun
March
9 rain days, 11h sun
April
15 rain days, 11h sun
May
22 rain days, 11h sun
June
21 rain days, 10h sun
July
22 rain days, 9h sun
August
25 rain days, 9h sun
September
26 rain days, 9h sun
October
23 rain days, 10h sun
November
9 rain days, 10h sun
December
3 rain days, 10h sun
Siem Reap in March
Data Sources for Siem Reap
Climate normals represent 30-year averages (1991-2020). Individual years may vary.