Best Day to Visit Siem Reap
Siem Reap, Cambodia
Forecast updated:
We rank the next 14 days on rain risk, wind, temperature comfort and sky conditions, then name the single best day.
Stable conditions often produce better results than perfect sunshine.
Forecast accuracy is highest within the next 1–3 days.
Best Day Intelligence for Siem Reap
Siem Reap sits at 13.4° N in the tropical zone. It is autumn there now, and the sun currently spends 12 hours above the horizon each day.
Siem Reap has Tropical monsoon with distinct wet and dry seasons. Siem Reap's climate revolves around the monsoon cycle. The wet season (May-October) brings heavy afternoon downpours but mornings are often clear. The dry season (November-April) has reliable sunshine but March-April heat can be oppressive, exceeding 40°C. Angkor Wat's moats reflect the sky differently depending on water levels — fuller in wet season, more reflective in dry. Near 13.4° latitude, Siem Reap's "best day" typically means the day with the lowest afternoon-storm probability rather than the warmest temperature — daytime highs vary little week to week.
Across a typical year, the strongest cluster of "best days" in Siem Reap falls during November to February (dry and cool) and Early March, aligned with the sunnier months of January, February, December. During August, September, October, best-day scores compress — the top day of the week may only reach 55–65/100 rather than the 80+ typical of peak season.
Angkor Wat sunrise photography requires arriving by 5:00 AM — the equinox alignment in March and September is special Use the 7-day best-day view for tactical planning, and the monthly best-month view for trip decisions more than a week out.
City-specific facts for Siem Reap
- •Latitude: 13.4° — best-day usually = lowest afternoon-storm probability
- •Peak best-day seasons: November to February (dry and cool) and Early March
- •Highest reliability months: January, February, December
- •Compressed-score months: August, September, October
- •Summer vs winter daylight: ~12.9h vs ~11.3h — sets the ceiling for outdoor day quality
- •Local season right now: autumn (northern hemisphere)
- •Daylight today: 12 h — annual range 11.3–12.9 h
- •Solar regime today: normal sunrise/sunset cycle
Find the Best Day to Visit Siem Reap
Day-to-day weather variation in Siem Reap often matters more than seasonal averages. Our algorithm scores the next 14 days on temperature comfort, precipitation risk, wind speed, and sky clarity — then ranks them so you can pick the single best window for your visit.
Best time to visit Siem Reap: November to February (dry and cool) and Early March. Summer highs reach 28-35°C, winters average 22-32°C. But even within a single week, the gap between the best and worst day can exceed 30 score points — that's why checking daily forecasts beats picking a month and hoping for the best.
💡 For the most reliable plans, book activities within the 3-day forecast window — accuracy drops significantly beyond day 5.
🧳 Travel Score
Sightseeing comfort: pleasant temperatures, low rain, gentle winds.
🏔️ Outdoor Score
Active pursuits: hiking, cycling, beach. Weighs wind safety and UV.
📸 Photography Score
Shooting conditions: sky clarity, visibility, atmospheric stability.
October requires flexible planning in Siem Reap
Siem Reap's climate revolves around the monsoon cycle. The wet season (May-October) brings heavy afternoon downpours but mornings are often clear. The dry season (November-April) has reliable sunshine but March-April heat can be oppressive, exceeding 40°C. Angkor Wat's moats reflect the sky differently depending on water levels — fuller in wet season, more reflective in dry.
October falls within Siem Reap's wetter season, with temperatures around 22-32°C. While rain is more frequent, it rarely lasts all day. Smart travelers use this to their advantage — fewer crowds, lower prices, and dramatic skies. Have indoor alternatives ready and check the daily forecast each morning before heading out.
Who Should Visit Siem Reap in October?
Travelers
Budget-friendly period with fewer tourists. Mix indoor attractions (museums, galleries, cafés) with outdoor exploration during dry windows. Waterproof shoes and a compact umbrella are essential. Many restaurants offer cozy indoor atmospheres perfect for this season.
Outdoor Enthusiasts
Outdoor activities require flexibility. Morning hours often provide the driest conditions. If rain starts, it typically passes within 1-2 hours. Trails may be muddy — wear waterproof boots. The cooler temperatures actually make long walks and hikes more comfortable than peak summer.
Photographers
Overcast skies create soft, even lighting that's ideal for portraits, street photography, and architectural details. Wet surfaces reflect light beautifully, creating mirror-like effects on streets and pavements. Dramatic cloud formations at sunset can produce spectacular colors that clear skies rarely match.
Planning Your Siem Reap Visit
☀️ Best Months for Sunshine
January, February, December
These months offer the most reliable dry weather and longest daylight hours. Ideal for beach activities, outdoor events, and landscape photography.
🌧️ Wetter Months
August, September, October
Higher chance of rain, but also fewer crowds and better hotel rates. Many travelers prefer this period for a more authentic, less touristy experience of Siem Reap.
📍 Did You Know About Siem Reap's Weather?
Angkor Wat is precisely aligned so that during the spring equinox, the sun rises directly over the central tower — a 900-year-old astronomical feat that draws photographers from around the world.
Local Weather Tips for Siem Reap
Angkor Wat sunrise photography requires arriving by 5:00 AM — the equinox alignment in March and September is special
Wet season visits mean fewer crowds and lusher green temples
Ta Prohm (the "Tomb Raider temple") is most atmospheric with wet, moss-covered stones after rain
When to Avoid Visiting Siem Reap
- •Persistent rain or storms — multiple consecutive rainy days limit sightseeing, outdoor dining, and photography. Check the rain forecast for Siem Reap before booking.
- •Extreme heat waves (above 40°C / 104°F) — heat exhaustion risk makes walking, sightseeing, and outdoor activities uncomfortable or dangerous.
- •Strong winds above 40 km/h — can close outdoor attractions, cancel boat tours, and make walking unpleasant.
- •Very high UV index (8+) without shade access — sunburn risk in under 20 minutes. See today's UV index for Siem Reap.
How We Calculate the Best Day to Visit
The best day to visit Siem Reap is determined by our Weather Score algorithm, which combines temperature comfort (20–25°C is optimal), precipitation probability (lower is better), wind speed (calm conditions score highest), and cloud cover into a single 0–100 rating. A score above 80 indicates excellent conditions for sightseeing, outdoor activities, and photography. Scores between 60–80 mean good but imperfect weather. Below 60, consider indoor alternatives or rescheduling. The forecast is updated daily with data from Open-Meteo and is most accurate within the next 1–3 days.
Frequently Asked Questions
Explore Nearby Destinations
Planning a multi-city trip? Check out best day to visit for these popular destinations near Siem Reap:
Sunrise & sunset photography
Best nights for lunar shots
Accurate sunset & sunrise
Live lunar status tonight
Month-by-month weather guide
Rain forecast & umbrella guide
Saturday & Sunday forecast
Sun protection & SPF guide
Best months for outdoor weddings
How to Choose the Best Travel Day
Learn our scoring methodology
Understanding Weather Forecasts
Why day 1-3 forecasts are most reliable
More about Siem Reap
Explore other weather tools for Siem Reap to plan your trip perfectly.
Guides & Articles for Siem Reap
Go deeper — learn how to make better weather decisions.
Want to understand how our scores work? Read our FAQ for details on Travel, Outdoor & Photography scores.