The month in detail
What to expect in May
In May, Siem Reap sees 91°F during the day with 5.9h of sunshine per day. Expect rain on 44% of days — a light raincoat in the bag is recommended.
May ranks 12 out of 12 months in Siem Reap. Compared to April: −2°F daytime, 20 pts more rainy days, −1.4h of sun per day.
This month's conditions
What it's like in May
UV index
8 · very high
protection essential
Feels like
oppressive heat
24°
Daylight
12.6h of daylight
Air quality
good
AQI 39
Compare
Is May the right month?
The best month in Siem Reap is January (6.1/10), 1.7 pt higher than May.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · Siem Reap
Expedia →
Activities
Tours, tickets, experiences
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Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · Siem Reap
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a tropical stay.
Country · Cambodia
🗣️LanguageKhmer
💶CurrencyRiel cambodgien (៛)
🚗DrivingRight-hand
🛡️Safety ⓘSafe · 2/5
💰Cost of living ⓘCheap · 2/5
🌡️ Climate
🌍Climate typeTropical
📈Climate trend ⓘStable
🔥Hottest monthMarch · 93°F
❄️Coolest monthDecember · 86°F
🌧️Rainiest month ⓘSeptember · 63%
🏝️ Tropical stay
🌞Dry season ⓘMay → Sep
🌧️Wet season ⓘDec → Mar
🌀Cyclones ⓘSeason Nov-Apr
Explore
Other destinations in May
If May doesn't convince you for this destination, compare with others.
Similar climate
Phnom PenhCambodiaCambodiaCambodia
BangkokThailandBattambangCambodiaChiang MaiThailand
Location
Where is Siem Reap ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
CambodiaTropical climate with a 6.1 → 4.4 gap between best and worst month. 10 years of ERA5 data to choose by project.
13.36°N · 103.86°E
Questions
Frequently asked questions
What is the best time to visit Siem Reap?
January is the best month with 88°F highs, 72°F lows, 8.2h of sunshine and 4.0% rainy days.
How many hours of sunshine does Siem Reap get in January?
Siem Reap averages 8.2 sunshine hours per day in January. It is the sunniest month with a climate score of 6.0/10.
What is the rainiest month in Siem Reap?
May is the most unfavourable month with May has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Siem Reap in January?
In January, overnight lows reach 72°F, while afternoon highs average 88°F.
Is Siem Reap good in winter?
In winter (December-February), Siem Reap scores 5.9/10 on average — Acceptable conditions for cultural visits.. The best month overall remains January with a score of 6.0/10.
When should you avoid Siem Reap?
May is the most difficult month to visit Siem Reap, with May has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Do you need sun protection in Siem Reap in May?
The average UV index reaches 8 in May in Siem Reap (very high), with about 12.6h of daylight. Protection essential.