Siem Reap, Cambodia Weather
Siem Reap hourly forecast: next 24 hours
Today's high of 95°F (35°C) is about 6°F (3°C) above the typical July high of 89°F (32°C).
Current conditions in detail
Siem Reap weather tomorrow (Sunday, July 19)
Tomorrow in Siem Reap looks sunny, with a high of 95° and an overnight low of 76°. Rain is unlikely (5% chance). Winds top out near 12 mph, and the UV index reaches 11 (extreme).
Siem Reap 14-day forecast
About the weather in Siem Reap
Weather in Siem Reap is shaped by its tropical wet-and-dry climate - expect year-round warmth split between a rainy season and a pronounced dry season. April afternoons typically reach 94°F (34°C), while December highs hover near 86°F (30°C). Annual precipitation averages 66.7 inches (1694 mm) over about 193 rainy days.
Siem Reap weather: quick facts
- Hottest month: April - highs near 94°F (34°C)
- Coldest month: December - highs near 86°F (30°C)
- Record high: 104°F (40°C) · Record low: 57°F (14°C) (2015–2024)
- Wettest month: September (27 rainy days) · Sunniest: March (11.1 h sun/day)
- Climate type: tropical wet-and-dry - year-round warmth split between a rainy season and a pronounced dry season
Temperatures through the year
The warmest stretch of the year centers on April. Highs average 94°F (34°C) and overnight lows stay near 78°F (26°C). The coolest month is December, with typical highs of 86°F (30°C) and lows around 71°F (22°C). Based on 2015–2024 weather data, temperatures have reached as high as 104°F (40°C) and dropped as low as 57°F (14°C).
Rain, sun and snow
September is usually the wettest month. It brings about 12.8 inches (324 mm) of rain over 27 days, while January is the driest. March brings the most sunshine, averaging 11.1 hours of sun a day.
Season by season
March through May
March through May in Siem Reap turns very hot, with daytime highs averaging 93°F (34°C) and nights around 78°F (26°C); expect showers on roughly 48 days across the season. With the humidity factored in, afternoons often feel hotter than the thermometer reads - run the numbers through the humidity and dew point converter to see why.
June through August
June through August in Siem Reap is hot, with daytime highs averaging 90°F (32°C) and nights around 78°F (25°C); expect showers on roughly 73 days across the season.
September through November
September through November in Siem Reap brings hot afternoons, with daytime highs averaging 87°F (30°C) and nights around 75°F (24°C); expect showers on roughly 63 days across the season.
December through February
December through February in Siem Reap runs hot, with daytime highs averaging 88°F (31°C) and nights around 72°F (22°C); rain falls on about 10 days over the three months.
Average temperatures in Siem Reap by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 88° | 71° | 2 | 0.7 in | 10.3 h/day | 64% |
| February | 91° | 73° | 4 | 1.0 in | 10.7 h/day | 62% |
| March | 94° | 77° | 10 | 2.0 in | 11.1 h/day | 66% |
| April | 94° | 78° | 14 | 4.2 in | 10.8 h/day | 69% |
| May | 92° | 79° | 23 | 7.7 in | 10.0 h/day | 77% |
| June | 91° | 78° | 22 | 6.1 in | 9.4 h/day | 78% |
| July | 89° | 78° | 26 | 8.7 in | 8.1 h/day | 81% |
| August | 89° | 77° | 25 | 8.4 in | 8.5 h/day | 81% |
| September | 87° | 76° | 27 | 12.8 in | 7.7 h/day | 86% |
| October | 87° | 75° | 23 | 10.1 in | 8.7 h/day | 85% |
| November | 87° | 74° | 13 | 4.0 in | 9.7 h/day | 78% |
| December | 86° | 71° | 4 | 1.0 in | 9.9 h/day | 70% |