Siem Reap is the gateway to the Angkor Archaeological Park, home to more than 50 temples built by the kings of the Khmer Empire between the 9th and 13th centuries. But this Cambodian city is far more than a staging ground for Angkor Wat. Wander through the Old Market at dawn for a bowl of nom banh chok (rice noodles in fish-based green curry), catch an evening show at Phare the Cambodian Circus, take a cooking class to learn the art of fish amok steamed in banana leaves, or explore the floating villages of Tonle Sap, Southeast Asia's largest freshwater lake. The food scene runs deep here, with Khmer classics like beef lok lak and red curry served alongside French baguettes, a legacy of colonial influence that still shapes breakfast tables across town.
The best time to visit Siem Reap is late October through early July, with the peak window falling in the dry season from December through February. This is when humidity drops, rain is virtually nonexistent, and evening temperatures dip to their most comfortable levels of the year, making long days of temple exploration far more bearable. December and November draw the biggest crowds thanks to ideal conditions and the annual Water Festival, so book accommodation early if you're targeting those months. February is the quietest month for tourism, making it a smart pick if you want the same dry weather with fewer visitors, though air quality can slip into the Unhealthy for Sensitive Groups range. For a secondary window, consider late October or November when the landscape is still lush from the rains and the Bon Om Touk festivities bring boat races and floating lanterns to the Siem Reap River. Avoid a stretch from late July through mid-October, when September alone sees precipitation roughly 19% of the time and humidity peaks.
Spring in Downtown Siem Reap, Cambodia
Spring in Siem Reap is the hottest stretch of the year, and you'll feel it the moment you step outside. Highs average 94.3°F (34.6°C), and mornings offer little relief with lows hovering at 78.6°F (25.9°C). Rain is almost unheard of during these months, with only 2 to 4 wet days across the entire season, so you'll have uninterrupted sunshine for temple visits. The tradeoff is that the midday heat at Angkor can be punishing. Start your temple circuits before 7am, retreat to your hotel pool or a cafe by noon, and save the Angkor National Museum or a Khmer cooking class for the afternoon hours.
Mid-April brings the absolute peak of the heat, with highs reaching 97°F (36.1°C) and overnight lows of 79.8°F (26.6°C). This also coincides with Khmer New Year, or Chaul Chnam Thmey, a three-day celebration in mid-April marking the end of the harvest season. In Siem Reap, the Angkor Sankranta festival fills the archaeological park with traditional games, parades, and ceremonial bird releases among the temple ruins. The city takes on a festive atmosphere with water splashing in the streets, though many local businesses close as Cambodians return to their hometowns for family reunions. Tourism runs at its slowest pace during spring, which means accommodation deals are plentiful. Pack a wide-brimmed hat, reef-safe sunscreen, and a refillable water bottle; you'll go through several liters a day exploring the ruins.
Summer in Downtown Siem Reap, Cambodia
The wet season settles in fully by June, and Siem Reap shifts into a greener, more humid rhythm. Highs ease slightly to 90.7°F (32.6°C), which feels less oppressive than spring's scorching afternoons, though the increased moisture in the air keeps things sticky. Showers typically roll in during the afternoon or evening, leaving mornings clear enough for temple visits. Expect 2 to 5 days with significant rain per month, with August tending toward the wetter end. The surrounding rice paddies turn a vivid emerald, and the moats around Angkor Wat fill to their brim, creating mirror-like reflections that photographers love.
Despite being the rainy season, June ranks among the busiest months for tourism, and accommodation prices run higher than usual. July and August see slightly fewer visitors. Lows stay warm at 78.1°F (25.6°C), so you won't need anything heavier than a light cotton layer, but a compact rain jacket or travel umbrella is essential. This is a good season for the Phare Cambodian Circus, which runs nightly evening performances combining acrobatics, live music, and traditional storytelling. The intimate show is run by graduates of a nonprofit arts school and makes for a compelling alternative to another temple day. A Khmer cooking class also works well as a rainy-afternoon activity: learning to prepare fish amok, the national dish of fresh fish steamed with coconut milk and kroeung spice paste in banana leaves, connects you to Cambodia's culinary roots.
Fall in Downtown Siem Reap, Cambodia
Fall is a season of two halves in Siem Reap. September is the wettest month, with precipitation occurring roughly 19% of the time, and humidity climbing to its annual peak. But conditions improve rapidly: by October the rains taper off, and November delivers some of the best weather of the year. Highs across the season average 88°F (31.1°C) and lows cool to 76.9°F (24.9°C), a noticeable improvement over the sweltering spring months. The landscape carries the deep green of the recent monsoon, and Tonle Sap Lake swells to its maximum size, making boat tours through the flooded forest and floating villages especially dramatic.
Pchum Ben, a deeply spiritual 15-day Buddhist festival honoring ancestors, typically falls in late September or early October. Cambodians visit pagodas to bring food offerings and pray for the departed, and the temples of Angkor take on a reverent, ceremonial atmosphere. A few weeks later, the Bon Om Touk Water Festival transforms Siem Reap in early November. Colorful dragon boat races line the Siem Reap River, floating lanterns drift downstream at night, and fireworks cap off the celebrations. This is one of Cambodia's largest holidays, and the city fills with visitors and locals alike. November and the weeks surrounding the Water Festival represent the busiest tourism period, so accommodation prices climb and advance booking is strongly recommended. Bring a light rain layer for September visits, but by November you can often leave the umbrella behind and focus on comfortable walking shoes for long days among the ruins.
Winter in Downtown Siem Reap, Cambodia
Winter is when Siem Reap is at its most comfortable. Highs hold steady at 88.1°F (31.2°C), warm but manageable, while lows dip to 71.5°F (21.9°C), the coolest overnight temperatures of the year. That drop makes a real difference: mornings feel fresh enough to start an Angkor Wat sunrise visit without immediately breaking a sweat. Rain is virtually absent, with January, February, and December all registering a 0% chance of significant precipitation. Humidity eases compared to the wet season, and the air feels noticeably lighter on your skin.
December is the single busiest month for tourism in Siem Reap, so expect higher accommodation rates and longer queues at the most popular temples like Angkor Wat, Bayon, and Ta Prohm. Spreading your visit across a three-day temple pass helps you explore at a relaxed pace and leaves room for non-temple activities: a quad bike ride through the rice fields on the edge of town, a zipline course near the Ta Nei temple, or an evening on the mellower bars of Street 26 as an alternative to the louder Pub Street scene. The Angkor Photo Festival, an international photography event with exhibitions and workshops, typically runs in December and adds a creative dimension to the city's cultural calendar. February is the quietest month for visitors, making it the sweet spot for travelers who want dry weather without the December crowds. Keep in mind that air quality can reach Unhealthy for Sensitive Groups levels in February due to seasonal agricultural burning; travelers with respiratory sensitivities should carry a mask for extended outdoor days. Lightweight, breathable clothing is all you need for daytime, with a light layer for cooler evenings when dining along the river.
At a Glance
Monthly weather, visitor crowds, air quality, holidays, and daylight hours to help you plan your trip.
Travel Tips & Safety for Downtown Siem Reap, Cambodia
Tuk-tuks are the primary way to get between downtown and the Angkor temples, and most hotels can arrange a driver for the day. Negotiate the price before departure, or ask your accommodation for their standard rate sheet. The US dollar is widely accepted alongside the Cambodian riel; ATMs dispense dollars in most cases, and you'll receive small change in riel. Dress modestly when visiting temples: shoulders and knees must be covered at Angkor Wat and other religious sites, and comfortable closed-toe shoes handle the uneven stone paths far better than sandals.
Watch your belongings in crowded market areas around Old Market and Pub Street, where opportunistic bag-snatching from passing motorbikes can occur. Drink only bottled or filtered water, and exercise caution with ice and raw produce from street stalls until you've identified vendors with good hygiene practices. The tropical heat is a genuine health concern year-round: carry water, take shade breaks, and recognize signs of heat exhaustion, especially during the scorching March through May window.