Click on a day for an hourly weather forecast
The temperatures in Siem Reap during May are extremely high, between 27°C and hot as 35°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of May in Siem Reap. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Siem Reap in May 2025.
If you’re planning to visit Siem Reap in the near future, we highly recommend that you review the 14 day weather forecast for Siem Reap before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 32° / 21° | 1 | 30 | 0 | 24 mm | Good | Siem Reap in January |
| February | 34° / 23° | 1 | 27 | 0 | 31 mm | Ok | Siem Reap in February |
| March | 36° / 26° | 4 | 27 | 0 | 99 mm | Ok | Siem Reap in March |
| April | 36° / 27° | 10 | 20 | 0 | 216 mm | Bad | Siem Reap in April |
| May | 35° / 27° | 13 | 18 | 0 | 298 mm | Bad | Siem Reap in May |
| June | 33° / 26° | 17 | 13 | 0 | 367 mm | Ok | Siem Reap in June |
| July | 32° / 25° | 21 | 10 | 0 | 426 mm | Ok | Siem Reap in July |
| August | 32° / 25° | 20 | 11 | 0 | 444 mm | Ok | Siem Reap in August |
| September | 31° / 25° | 22 | 8 | 0 | 575 mm | Ok | Siem Reap in September |
| October | 31° / 24° | 16 | 15 | 0 | 487 mm | Ok | Siem Reap in October |
| November | 31° / 23° | 6 | 24 | 0 | 151 mm | Good | Siem Reap in November |
| December | 31° / 22° | 1 | 30 | 0 | 32 mm | Good | Siem Reap in December |