Best Time to Visit Cambodia: A Month-by-Month Guide for Americans

Rainy season (May-October): cheaper, greener, underrated

The phrase "rainy season" scares off a lot of Americans, and it should not. Cambodia in the green season does not mean gray skies and washed-out days. For most of May through October, the pattern is a hot, often sunny morning, building cloud through the afternoon, and then a heavy but short downpour — frequently in the late afternoon or evening — that clears as fast as it arrives. You can structure entire days around it: temples and outdoor sights in the morning, the rain through a long lunch, and you are back out before sunset.

The upside is real. Prices on flights and hotels fall, the crowds at Angkor thin dramatically, the moats and reflecting pools fill, and the whole countryside turns an electric, photogenic green that you simply never see in the brown of late dry season. Rice paddies glow, waterfalls run, and Tonle Sap swells to its full size. For photographers and travelers who would rather trade guaranteed sun for space, atmosphere, and value, the green season is a quietly excellent call.

September and October are the wettest stretch, when rainfall is heaviest and the occasional all-day soaker does happen, plus some rural roads to far-flung temples can flood. If you go in those two months, keep your itinerary loose, build in a buffer day or two, and lean toward the well-served sights around Siem Reap and Phnom Penh rather than the most remote jungle temples. May, June, and July are the gentler, lower-risk end of the green season and arguably the best value-to-weather ratio in the whole year.

Because green-season demand is lower, flights and hotels tend to be at their softest in these months too. If your budget is the deciding factor rather than guaranteed sunshine, our Cambodia trip cost breakdown in USD lays out what a green-season trip actually runs so you can see exactly what you are trading.

The best month to visit Angkor Wat, and the full year at a glance

If Angkor Wat is the reason you are going — and for most first-time American visitors it is — the standout months are December and January. The air is clearest, the sunrise behind the central towers is at its most reliable, the famous reflecting-pool shot actually works, and the mid-80s daytime heat lets you explore the wider Angkor complex on foot without wilting. November and February are nearly as good and slightly less crowded at the headline sunrise spots.

That said, the "best" month depends on what you are optimizing for. Want the green moats and a near-empty causeway for your photos? Late green season delivers that, with the gamble of an afternoon storm. Want guaranteed dry stone and cool mornings, and you do not mind sharing the sunrise with a few hundred others? December and January are unbeatable. There is no wrong answer — there is only the trade-off between weather certainty on one side and price, space, and lushness on the other.

Whatever month you land on, the temples reward an early start and a plan. If you want a day-by-day shape to build around your chosen season, our 10-day Cambodia itinerary for first-timers sequences Angkor, Phnom Penh, and the coast so the weather works for you rather than against you.

Your eVisa timing does not change with the season

Here is the reassuring part: the season you choose has no effect on how the Cambodia eVisa works. Whether you fly in for a cool December sunrise or a green-season July storm, the rules are identical. A Tourist eVisa is $80 USD all-in, approved in 3 business days, valid for 3 months from the date it is issued, and gives you a 30-day single-entry stay that starts when you arrive. A Business eVisa is $90 USD on the same 3-business-day timeline. Nothing about the weather, peak season, or the holidays changes those numbers.

What the season can affect is the calendar around the application, not the visa itself. Cambodian public holidays — Khmer New Year in mid-April, Pchum Ben in the fall — can slow processing slightly, so if your trip lands near one, apply at the earlier end of your window and give the 3-business-day clock a little extra breathing room. Peak December demand does not change the approval time, but it does mean booking flights and hotels well ahead. The one thing worth flagging year-round: the tourist auto-extension ended in November 2025, so the 30-day stay is now a hard ceiling — plan your dates inside it.

Because the eVisa is valid for 3 months from issue, there is a sweet spot for lodging it that holds in every season. Our guide on the best time to apply for your Cambodia eVisa works through that timing in detail, including how the 3-business-day clock counts and where the separate e-Arrival window fits.

So when should you actually go?

Strip away the detail and the decision is short. If this is your first trip and you want the easiest, most photogenic version with the lowest weather risk, go in the November-to-February dry season and book ahead — December and January if Angkor is the headline. If you are flexible, budget-minded, and would rather have space and green scenery than guaranteed sun, the May-to-July early green season is the best-kept secret of the Cambodian calendar. March, April, and the late green months of September and October are for travelers who know exactly what they are signing up for: serious heat in the spring, real rain in the fall, but real rewards in light, value, and quiet.

Across all of it, KTI Techo International in Phnom Penh, Siem Reap-Angkor, and the southern coast handle arrivals the same way every month of the year. The arrival experience does not get worse in the rain or better in the dry — it is your sightseeing, not your landing, that the season touches. Pick the months that match how you like to travel, and the rest is just packing for either cool-and-clear or warm-and-wet.

When your window is set, the visa is the simple part: a Tourist eVisa at $80 USD or a Business eVisa at $90 USD, approved in 3 business days, delivered as a printable PDF by email, with free resubmission if Immigration flags a correction and US-timezone support if you get stuck. When your dates firm up, apply for your Cambodia eVisa, then set a reminder for the e-Arrival Card in the week before you fly.