If you plan to visit Siem Reap in May, the weather is typically alright, with an average high temperature of +93°F during the day and approximately 0 sunny days. Expect some rainy, though, as there are typically 27 rainy days in the month and around 145 mm of precipitation. The weather is changeable so you may have to pack for every eventuality. Search flightsin one click on Avionero.
Average weather
☀️
+93°F
Avg. max. temperature
+72°F
Min.
+104°F
Max.
145 mm
Total precipitation
77%
Avg. humidity
1 m/s
Avg. wind
0 ☀️
Sunny Days
3 ⛅️
Cloudy
27 🌦
Rainy
Our opinion: Siem Reap has OK weather in May.
Avionero – A better way to search for flights:
Cheapest prices on the market!
Check all your dates and date combinations in a single search!
Want inspiration, set your dates and find the cheapest destinations!
Saves your searches in the browser so you can easily return to them!
Average temperature in Siem Reap in May
Here are the expected maximum, average and minimum temperatures in Siem Reap for May based on the historical data.
Last Year
Historical Data
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
Siem Reap weather looks like this, on average, in May and the surrounding months.
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.
Wind speed in Siem Reap in May based on historical data.
Last Year
Historical Data
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
Amount of rainfall in mm during May in Siem Reap based on historical data.
Last Year
Historical Data
Typically, there is a 58% chance of rain on an average day in May, with total rainfall of approximately 110 mm. The maximum amount of rainfall per day is around 23 mm, which is considered light rain.May is a pretty wet month with over 18 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
Here’s how May is compared with other months in the amount of precipitation, total mm:
Siem Reap wettest month is September, where a typical day has a 93% chance of precipitation and 253 mm of rainfall per day. January, on the other hand, is the driest month with a mere 16% chance of precipitation and 9 mm of rainfall per day.
How was the weather last May in Siem Reap?
This is the weather in Siem Reap in May 2023:
1 May
☁️
+93°F
2 May
☁️
+95°F
3 May
☁️
+95°F
4 May
☀️
+97°F
5 May
☁️
+100°F
6 May
☁️
+102°F
7 May
☁️
+103°F
8 May
☁️
+97°F
9 May
🌧️
+94°F
10 May
🌧️
+92°F
11 May
☁️
+92°F
12 May
🌧️
+88°F
13 May
☁️
+92°F
14 May
☁️
+94°F
15 May
☁️
+94°F
16 May
☁️
+96°F
17 May
☁️
+97°F
18 May
☁️
+99°F
19 May
☁️
+100°F
20 May
☁️
+100°F
21 May
☁️
+97°F
22 May
☁️
+97°F
23 May
☁️
+95°F
24 May
☁️
+96°F
25 May
🌧️
+92°F
26 May
☁️
+95°F
27 May
🌧️
+92°F
28 May
🌧️
+88°F
29 May
🌧️
+89°F
30 May
☁️
+92°F
31 May
☁️
+91°F
In May 2023 Siem Reap had 1 sunny days, 23 cloudy days, and 7 rainy days. The average maximum temperature was +95°F, with an absolute maximum of +104°F and a minimum of +88°F. The average humidity was 76%, with a maximum of 100% and a minimum of 44%. The average wind speed was 2 m/s, with a maximum of 8 m/s and a minimum of 0 m/s.
Are you planning a trip in May?
Climate Change Over the Years
This is how Siem Reap climate has changed over the last 43 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
Frequently asked questions about the weather in Siem Reap in May:
Is May a good time to visit Siem Reap?
It’s always a good time to visit Siem Reap, but the weather is changeable in May, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.
Can you sunbathe in Siem Reap in May?
Absolutely, May is hot in Siem Reap. Plan on beach and pool time, and ensure that you pack light and breathable options to stay comfortable.
Is Siem Reap rainy in May?
Siem Reap is often rainy in May. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Siem Reap in May?
Usually, it’s not very sunny in Siem Reap in May, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
Other cities in Cambodia
Check out the weather for other cities in Cambodia.
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.
