Siem Reap (Angkor) weather in June
June in Siem Reap: sweltering, rainy, with clean air — a gamble, with 21 rainy days.
Updated September 2026 · climate normals from ERA5 reanalysis
#6 of 12 months in Siem Reap · #1086 of 1413 destinations to visit in June · comfort 62/100 (tier C)
- Days
- 34°C
- Nights
- 26°C
- Wet days
- 21
- Sun
- 9.9 h
- Humidity
- 78%
- Daylight
- 13 h

Traveller notes on Siem Reap in June
Notes from nearby Battambang (77 km away)
Siem Reap doesn't have its own notes for June yet — these are about Battambang, close enough to share the season.
Cambodia's forum is generally upbeat about June: it's the start of the rainy season, but posters were clear it doesn't rain every day, and the rain actually helps take the edge off the heat. The typical pattern is an hour-long deluge that floods the street briefly before life carries on as normal - keep your phone and passport dry and expect it, not dread it. Battambang specifically sits inland, and forum posters noted coastal areas take the brunt of the wetter weather, so this stretch of the country generally sees less rain than the coast at the same time of year.
Other months in Siem Reap
Regulars are direct that temperatures here are essentially guaranteed to top 35C this month, though generally less humid than the peak of July, with the standard workaround being an early start, a midday retreat to a pool and air conditioning, then heading back out again late in the afternoon. Our row backs that hot, genuinely dry read, 35C reading as a scorching 40C, over 24.3C nights feeling 28C, with rain light at 36.9mm across 6.4 days and humidity at 65 percent. Regulars are consistent some visitors do manage this month and even April despite the intensity, while others avoid it deliberately, the temples themselves offering little shade regardless of timing. Sun protection and a genuinely early start remain the standard advice throughout. The record: 11 hours of sun, a 13.1 kph wind and AQI 78.
Siem Reap-forum threads asking if April is simply too hot don't sugarcoat it - one thread calls the month stinking hot, brain-bakingly hot, everything parched, brown and dusty, with daytime temperatures well into the 40s Celsius on the worst days. Regulars offer the same standing advice: start sightseeing at first light, retreat for a long midday siesta somewhere air-conditioned with a pool, then go back out in the late afternoon once the worst heat breaks. A tuk tuk ride is recommended over an enclosed car, since the breeze dries off sweat rather than trapping heat the way air conditioning does when you step back out. Khmer New Year lands in April too, and mango season is in full swing. The midday temples empty out fast as visitors retreat indoors. The record: a scorching 35.3C by day feeling like a punishing 41C, 25.4C nights, 74mm across 10 days, 67 percent humidity, an unhealthy 77 AQI and 11 hours of sun.
Siem Reap-forum threads on November weather call it the downhill side of the wet season - locals treat November through January as their cold season, bundling up for the mornings until around 9:30 or 10am even though visitors mostly find it warm rather than cold. The standard itinerary follows that same schedule: Angkor tours start around 8am while it's still cool, wrapping up by midday once it gets too warm to keep walking. The monsoon is winding down but still unpredictable enough that a poncho is standard advice, with any downpour usually arriving in a concentrated morning or evening window rather than spread through the day. Posters call the November-to-mid-January stretch one of the best climate windows of the year, which is exactly why it's also peak season. The record: 31.5C days feeling like a sticky 37C, 23.6C nights, 98mm across 12.9 days, 79 percent humidity and 9.4 hours of sun.
February is the last comfortable month at Angkor. It is firmly inside the dry season - our row gives 15.5mm across 2.9 days - and the mornings are still among the year's coolest, which matters when the plan is a sunrise at the temples. What regulars warn about is the dust, because months without rain leave the roads and the causeways powdery, and about the direction of travel: February is where the temperature begins its climb towards 39 or 40C by April. Tonle Sap still has enough water for the boat trips in this month, which stops being true later. It is high season, so the temples are busy. The record: 32.8C days that feel like 36C, 21.9C nights, humidity 61 percent and 10.6 hours of sun.
Add your own note from Siem Reap's card on the map.
Siem Reap climate normals — June
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Siem Reap in June
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 3 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Siem Reap's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherSiem Reap's weather peaks December–February, best around January.
Best weatherFair weatherToughest weather
What's on in Siem Reap in June
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Southwest monsoon
15 May – 31 Oct · usuallyAfternoon rain, empty temples in the mornings and the moats full enough to give the reflections the postcards use. The unpaved roads out to the far temples are the catch.
Where is Siem Reap?
Siem Reap in June — FAQ
- Is June a good time to visit Siem Reap?
- June in Siem Reap: sweltering, rainy, with clean air — a gamble, with 21 rainy days. It ranks #6 of 12 months for Siem Reap on SeasonMap's comfort score (62/100).
- What is the weather like in Siem Reap in June?
- In June, Siem Reap averages a daily high of 33.5°C and a low of 25.5°C, with about 123.7 mm of rain over roughly 20.9 rainy days.
- What is the air quality in Siem Reap in June?
- Siem Reap has a mean US Air Quality Index of about 33 in June.