Siem Reap Weather in May
What's the weather like in Siem Reap (Siem Reap) in May 2025?
The climate in Siem Reap during May can be summarized as very hot, humid and wet.
May is in the spring in Siem Reap and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a steamy 34°C (94°F), whilst at night 25°C (76°F) is normal.
| Daytime temperature | 34.2°C 93.6°F |
|---|---|
| Nightly temperature | 24.6°C 76.3°F |
| Average temperature | 29.4°C 84.9°F |
| Daily sunshine | 7.4 hrs |
| Avg rainfall | 146 mm 5.7 ins |
| Rainy days | 15 days |
| Sea temperature | 29.9°C 85.7°F |
| Humidity | 79% |
| Windspeed | 5.8kph 4 mph |
On average May is the 6th wettest month of the year in Siem Reap with around 146mm 5.7 inches of rain making it a wet time to visit. This rainfall is typically spread over 15 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.4 hours of sunshine per day.
May temperatures in Siem Reap
May rainfall
May hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Siem Reap in May 2025.
Other monthly averages
Siem Reap weather stats
| Hottest month: | April | 35.7°C 96.3°F |
|---|---|---|
| Driest month: | January | 1mm 0ins |
| Sunniest month: | January | 9.6hrs |
| Coldest month: | December | 30.1°C 86.2°F |
| Wettest month: | September | 250mm 9.8ins |
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