Weather in Siem Reap in May 2025
Average weather
Average temperature in Siem Reap in May
Going from a maximum of +104°F during the day to a minimum of +77°F during the night, the temperature in May averages around +95°F.
The average maximum temperature goes down 7% by the end of the month, compared with the beginning of the month, from +93°F to +91°F.
Is Siem Reap warm or cold in May?
Siem Reap is typically hot in May.
Maximum temperatures go down compared to the previous month from +95°F to +93°F. The minimum temperature also goes up from +81°F to +81°F.
Make sure that you pack your summer linen and swimming costumes; it’s probably going to be hot.
May is one of the warmest months in Siem Reap, here is the comparison with other months:
Climate in Siem Reap in May
| April | May | June | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +95°F | +93°F | +91°F | ||||
| Min. temperature | ||||||
| +66°F | +72°F | +75°F | ||||
| Max. temperature | ||||||
| +104°F | +104°F | +100°F | ||||
| Rainfall | ||||||
| 97 mm | 145 mm | 129 mm | ||||
| Wind | ||||||
| 1 m/s | 1 m/s | 2 m/s | ||||
| Humidity | ||||||
| 72% | 77% | 77% | ||||
| Air pressure | ||||||
| 1008 HPa | 1007 HPa | 1006 HPa | ||||
| Sunny days | ||||||
| 3 | 0 | 0 | ||||
| Cloudy days | ||||||
| 4 | 3 | 3 | ||||
| Rainy days | ||||||
| 22 | 27 | 26 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
May weather is still as ok as in April. It’s getting colder in May. From +95°F in the day, the average maximum temperature lowers to +93°F. Prepare for more rain. Average rainfall goes from 97 mm to 145 mm. Humidity rises from 72% to 77%. The average wind speed doesn’t change much during May, staying around 1 m/s. The days becoming less sunny, going from 3 sunny days in April to 0 in May.
June brings much the same weather, it remains ok.
Wind
The average wind speed is 2 m/s getting up to 3 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Siem Reap is gradually increasing during May, going from 1 m/s to 2 m/s over the course of the month.
Rain
How was the weather last May in Siem Reap?
Climate Change Over the Years
The climate in Siem Reap in May has not changed that much over the last 43 years.
The average temperature was the lowest in 1999 (+88°F) and the highest in 2015 (+92°F). The driest year was 2015 with only 880 mm of rainfall, and the wettest year was 1999 with 1854 mm.
FAQ
Is May a good time to visit Siem Reap?
Can you sunbathe in Siem Reap in May?
Is Siem Reap rainy in May?
Is it sunny in Siem Reap in May?
Other cities in Cambodia
Monthly weather in Siem Reap
Source of the data
For this page, we’ve looked at the typical weather in Siem Reap, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.