Best Time to Visit
Best Time to Visit Siem Reap
🇰🇭 Siem Reap, Cambodia · Asia
Based on 30-year climate data (1991-2020) from Open-Meteo
Recommended Travel Months
Jan
31°
21°
Great
Feb
33°
23°
Great
Mar
34°
25°
Good
Apr
34°
26°
Good
May
33°
26°
Good
Jun
32°
26°
Good
Jul
32°
25°
Good
Aug
31°
25°
Good
Sep
30°
25°
Good
Oct
30°
24°
Good
Nov
30°
23°
Good
Dec
30°
21°
Great
Month-by-Month Weather in Siem Reap
| Month | High | Low | Rain Days | Sunshine | Humidity | UV | Rating | Details |
|---|---|---|---|---|---|---|---|---|
| JanuaryRecommended | 31°C | 21°C | 2 | 11h | 82% | 3 | Great | View |
| FebruaryRecommended | 33°C | 23°C | 3 | 11h | 82% | 3 | Great | View |
| March | 34°C | 25°C | 9 | 11h | 82% | 6 | Good | View |
| April | 34°C | 26°C | 15 | 11h | 82% | 6 | Good | View |
| May | 33°C | 26°C | 22 | 11h | 82% | 8 | Good | View |
| June | 32°C | 26°C | 21 | 10h | 82% | 8 | Good | View |
| July | 32°C | 25°C | 22 | 9h | 82% | 8 | Good | View |
| August | 31°C | 25°C | 25 | 9h | 82% | 8 | Good | View |
| September | 30°C | 25°C | 26 | 9h | 82% | 6 | Good | View |
| October | 30°C | 24°C | 23 | 10h | 82% | 6 | Good | View |
| November | 30°C | 23°C | 9 | 10h | 82% | 3 | Good | View |
| DecemberRecommended | 30°C | 21°C | 3 | 10h | 82% | 3 | Great | View |
Data source: Open-Meteo ERA5 reanalysis archive, 30-year historical normals (1991-2020). Temperatures in Celsius. Sunshine hours are daily averages.
Seasonal Guide to Siem Reap
Spring (March to May)
Avg: 34°C high, 26°C low
Spring in Siem Reap brings gradually warm temperatures. Daytime highs reach around 34°C (93°F) while nights cool to 26°C (79°F). This is one of the wetter periods, so waterproof gear is recommended.
Summer (June to August)
Avg: 32°C high, 25°C low
Summer is the hottest season in Siem Reap, with temperatures reaching 32°C (90°F). The heat can be intense, but mornings and evenings remain pleasant for sightseeing. Long daylight hours and abundant sunshine provide plenty of time to explore.
Fall (September to November)
Avg: 30°C high, 24°C low
Fall in Siem Reap is a transitional season with changing conditions. Temperatures settle around 30°C (86°F) during the day and 24°C (75°F) at night. Rainfall picks up during this period, so waterproof clothing is advisable.
Winter (December to February)
Avg: 31°C high, 22°C low
Winter in Siem Reap brings the cooler period, though temperatures remain warm by most standards. This can actually be one of the most comfortable times to visit if you prefer less intense heat.
When to Avoid Siem Reap
The least favorable time to visit Siem Reap is April and May. During this period, you can expect very hot temperatures, heavy rainfall, high humidity.
April
Challenges: very hot temperatures, heavy rainfall, high humidity
May
Challenges: very hot temperatures, heavy rainfall, high humidity
March
Challenges: very hot temperatures, high humidity
Note: visiting during off-peak months often means lower prices, fewer crowds, and a more authentic experience. Consider your priorities when planning your trip.
What to Pack for Siem Reap
Packing recommendations for visiting Siem Reap during the best travel months (January, December, February), when temperatures range from 22°C to 31°C:
- +Lightweight, breathable clothing (cotton or linen)
- +Shorts, t-shirts, and sandals for daytime
- +Reusable water bottle
- +Universal power adapter
Siem Reap Year-Round Climate Overview
Siem Reap has a tropical climate (Koppen classification: Am). The warmest month is April with highs of 34°C, while the coldest month is December at just 30°C. Annual rainfall averages 1340mm across approximately 180 rain days.
| Metric | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °C | 31 | 33 | 34 | 34 | 33 | 32 | 32 | 31 | 30 | 30 | 30 | 30 |
| Low °C | 21 | 23 | 25 | 26 | 26 | 26 | 25 | 25 | 25 | 24 | 23 | 21 |
| Rain Days | 2 | 3 | 9 | 15 | 22 | 21 | 22 | 25 | 26 | 23 | 9 | 3 |
| Rain mm | 8 | 14 | 55 | 98 | 154 | 137 | 143 | 173 | 257 | 225 | 61 | 15 |
| Sun h/day | 11 | 11 | 11 | 11 | 11 | 10 | 9 | 9 | 9 | 10 | 10 | 10 |
| Humidity % | 82 | 82 | 82 | 82 | 82 | 82 | 82 | 82 | 82 | 82 | 82 | 82 |
| UV Index | 3 | 3 | 6 | 6 | 8 | 8 | 8 | 8 | 6 | 6 | 3 | 3 |
Compare Nearby Destinations
Considering alternatives to Siem Reap? Compare the best travel months for nearby cities:
Frequently Asked Questions
What is the best month to visit Siem Reap?+
The best time to visit Siem Reap is January, December, February. During these months, temperatures average 31°C (88°F) with 11 hours of daily sunshine and only 3 rain days per month. These conditions offer the most comfortable weather for sightseeing and outdoor activities.
What is the worst time to visit Siem Reap?+
The least ideal time to visit Siem Reap is April and May. During this period, you can expect very hot temperatures, heavy rainfall, high humidity. While Siem Reap can still be visited during this time (often with fewer crowds and lower prices), the weather may limit outdoor activities.
Is Siem Reap good to visit in summer?+
Summer in Siem Reap (June to August) brings temperatures of 32°C (90°F) highs and 25°C (77°F) lows, with about 9 hours of sunshine and 23 rain days per month. Consider visiting during the recommended months instead for better weather.
What is the rainy season in Siem Reap?+
The rainy season in Siem Reap runs from May to October, when average rain days increase to 23 days per month. Total monthly precipitation during this period averages 182mm.
What should I pack for Siem Reap?+
When visiting Siem Reap during the best travel months (January, December, February), pack lightweight breathable clothing, sun protection, and comfortable walking shoes. Rain gear is generally not needed. Sunscreen and sunglasses are recommended.
Is January a good time to visit Siem Reap?+
Yes, January is one of the best months to visit Siem Reap. Expect average highs of 31°C (88°F), 11 hours of daily sunshine, and only 2 rain days. The weather is ideal for exploring the city, visiting outdoor attractions, and enjoying local activities.
Detailed Monthly Weather for Siem Reap
For a complete day-by-day weather breakdown including packing lists, activities, and local events, explore each month individually:
January
February
March
April
May
June
July
August
September
October
November
December
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