Best Time to Visit Phnom Penh (Cambodia)
I have been to Phnom Penh four times across different parts of the year, and I can tell you the city reads completely differently depending on the season. My honest answer to when to visit is November through February. I want to explain why, and also help you figure out what the rain and the heat really feel like so you land on the right months for your own trip. Phnom Penh is a city of riverfront promenades, colonial boulevards, and the enormous Royal Palace complex, and every one of those places hits differently under a clear January sky than it does in the middle of a September downpour.
Phnom Penh has two seasons, not four
Cambodia sits in a tropical monsoon climate, so the year splits into a dry season and a wet season. The dry season runs roughly from November to April. The wet season fills May through October. Within the dry half you still get a big shift, because the early months are cooler and the later ones turn brutally hot.
Daytime temperatures hover in the high 20s Celsius (low 80s Fahrenheit) for much of the year, which sounds pleasant until you add humidity. The real swings come from rain and the dry-season heat. In my experience the humidity makes even a moderate number feel heavier than it does back home, so I stopped trusting plain forecasts and started checking the feel of the air instead.
November, December, and January are my favorites
This is the sweet spot. The monsoon has wound down, the skies stay mostly clear, and the worst of the heat has not arrived yet. I found December and January the most comfortable months, with afternoon highs around 31 to 33 degrees Celsius (88 to 92 Fahrenheit) and much lower humidity. Evening walks along the riverside are genuinely enjoyable, and motorbike trips across town stop feeling like a workout. I covered the palace, the national museum, and the markets without rushing or hiding from the sun.
Crowds peak here too, especially with the Water Festival in November. Accommodation prices rise and good hotels book out, so I always reserve well ahead. My rule is to book at least two months out if I travel in December, because I learned that lesson the hard way one year.
February and March turn hot but stay dry
February still treats you well, though the mercury starts climbing. By March I noticed temperatures pushing past 35 degrees Celsius (95 Fahrenheit). The tradeoff is that you see almost no rain, and the dry air makes sightseeing trips to the Royal Palace, the Silver Pagoda, and the National Museum far more bearable than in the wettest months. I packed extra water and went out early in the day during this stretch.
April is the hottest month, and Khmer New Year
April is Phnom Penh at its most extreme. This is the peak of the hot, dry season and easily the hottest month of the year. The city empties out during Khmer New Year in mid April, when locals travel home and many shops close for days. I have been caught in that quiet stretch, and while I enjoyed the calm, I missed a few places I had hoped to see. If you want energy and full opening hours, skip April.
May is the turning point
Late May usually brings the first serious rains as the monsoon begins building. Humidity climbs fast, and the combination of heat and close air is the hardest thing I have dealt with in the country. Prices drop sharply, though, since the tourism rush is gone. If you are on a tight budget and can handle sweat, this is your chance to stretch money further and find near-empty guesthouses.
The wet season from June to October
June through October is the true rainy season. Rain typically arrives in sudden afternoon and evening downpours. I learned to plan my days around them, doing outdoor exploring in the morning and saving indoor time like museums, cafés, and cooking classes for later. The storms are usually short, and the city smells fresher because of them.
September and October are the wettest, with the heaviest totals of the year. Streets near the Tonlé Sap can flood after big storms, and I found some riverside paths under shallow water within the hour. Transport gets slower and indoor plans matter more. The upside is lush green scenery, fewer travelers, and low room rates that made my trip noticeably cheaper.
My month-by-month verdict
If I had to rank Phnom Penh for a first visit, I would aim for December or January as the top choice, with November and February close behind. That window gives me comfortable weather, mostly dry days, and full access to the city’s sights. Budget travelers will get the best value in the shoulder months of May and late October. April and the deep wet season of September work only if you come ready for heat or rain.
Whatever month you pick, pack light breathable clothes, a decent umbrella, and sturdy shoes that survive wet pavement. Phnom Penh repays you with its history and energy in every season. Choose November through February for comfort, or embrace the rain and the savings in the summer. Both versions of the city are worth your time.
