Best and Worst Months to Visit Siem Reap: Weather and Seasonal Guide

Quick Weather Answer: Best and Worst Time to Visit Siem Reap

The best time to visit Siem Reap for weather is usually November, when average daytime temperatures are around 88F (31C) and nights are near 72F (22C). The worst time to visit Siem Reap is usually March, because the weather is less comfortable for long walks, outdoor sightseeing, and casual transit-heavy days.

• Best month for weather: November
• Worst month for weather: March
• Most comfortable season: Winter
• Hottest month: March, with average highs near 98F (37C)
• Coldest month: December, with average lows near 69F (20C)
• Rainiest month: September, with about 9.7 inches of rain
• Driest month: December, with about 0.2 inches of precipitation
• Most unpredictable weather period: the summer rainy period
• Best weather for a first-time trip: January, November, and December

What Is the Weather Like in Siem Reap?

Siem Reap has a warm climate all year, so the main difference between months is not cold versus warm. The real question is rain, humidity, storms, cloud cover, and how heavy the air feels during the wettest part of the year. The Siem Reap climate by month shows average highs from about 90F (32C) in the coolest part of the year to about 98F (37C) in the hottest part. Annual precipitation averages roughly 52.3 inches.

Weather in Siem Reap changes the feel of the city because this is a place where comfort depends on more than the number on a forecast. A mild month can make metro transfers, neighborhood walks, outdoor meals, and photography feel easy. A difficult month can make the same itinerary feel slower, sweatier, colder, wetter, or more dependent on indoor breaks.

Best Month to Visit Siem Reap for Weather

November is the best month to visit Siem Reap for weather in a typical year. Average daytime highs are near 88F (31C), while nights are around 72F (22C). Precipitation averages 1.5 inches, so the month is usually more comfortable than the wetter, hotter, or colder parts of the year.

What makes November stand out is balance. It is not necessarily perfect every day, but it usually gives travelers the best combination of outdoor comfort, manageable weather risk, and enough flexibility for a first-time trip. If hotel prices or crowds rise during this period, that popularity is at least partly weather-driven.

Worst Month to Visit Siem Reap for Weather

March is the worst month to visit Siem Reap from a pure weather perspective. Average highs are around 98F (37C), and nights are near 77F (25C). The month also brings some rain, averaging about 1.8 inches, which can make long outdoor days less comfortable.

Heat is the main problem. Even if mornings are workable, afternoons can make long walks tiring, and travelers who dislike heat may end up planning the day around shade and air conditioning. Lower hotel prices or fewer visitors can make March acceptable for flexible travelers, but it is not the month I would choose for the best weather in Siem Reap.

Siem Reap Weather by Season

Spring Weather in Siem Reap

In Siem Reap, spring is less distinct than in a four-season climate, but March, April, and May still have their own weather pattern. Daytime highs typically run from 93F (34C) to 98F (37C), with nights from about 77F (25C) to 78F (26C). Across the season, precipitation averages around 10.8 inches. The season is usable, but comfort changes from month to month, so the exact travel month matters. The best spring month for weather is usually April, while March is the least comfortable part of the season.

Summer Weather in Siem Reap

In Siem Reap, summer is less distinct than in a four-season climate, but June, July, and August still have their own weather pattern. Daytime highs typically run from 87F (30C) to 89F (32C), with nights from about 76F (24C) to 77F (25C). Across the season, precipitation averages around 23.2 inches. Rain and humidity shape the season, so outdoor plans need more flexibility than the temperature alone suggests. The best summer month for weather is usually July, while June is the least comfortable part of the season.

Fall Weather in Siem Reap

In Siem Reap, fall is less distinct than in a four-season climate, but September, October, and November still have their own weather pattern. Daytime highs typically run from 86F (30C) to 88F (31C), with nights from about 72F (22C) to 76F (24C). Across the season, precipitation averages around 16.9 inches. Rain and humidity shape the season, so outdoor plans need more flexibility than the temperature alone suggests. The best fall month for weather is usually November, while September is the least comfortable part of the season.

Winter Weather in Siem Reap

In Siem Reap, winter is less distinct than in a four-season climate, but December, January, and February still have their own weather pattern. Daytime highs typically run from 90F (32C) to 96F (36C), with nights from about 69F (20C) to 73F (23C). Across the season, precipitation averages around 1.5 inches. This is one of the more comfortable stretches of the year for walking, transit transfers, outdoor meals, and photography. The best winter month for weather is usually December, while February is the least comfortable part of the season.

Siem Reap Weather by Month: What to Expect

January in Siem Reap

January in Siem Reap typically brings daytime highs around 93F (34C) and nighttime lows near 69F (21C). Expect dry weather, with only about 0.4 inches of rain, and average winds near 3 mph. In real life, this is warm to hot city weather; it can still work, but midday walking needs shade, water, and a flexible pace.

Outdoor comfort is good, with a few weather tradeoffs for most travelers. Pack light breathable clothing, strong sun protection, a refillable water bottle. Verdict: January is a good month for weather in Siem Reap.

February in Siem Reap

February in Siem Reap typically brings daytime highs around 96F (36C) and nighttime lows near 73F (23C). Expect dry weather, with only about 0.8 inches of rain, and average winds near 3 mph. In real life, the heat can feel sticky and draining, especially when clouds build and the air does not cool much after sunset.

Outdoor comfort is too hot for many travelers for most travelers. Pack light breathable clothing, strong sun protection, a refillable water bottle. Verdict: February is weather-challenging in Siem Reap and needs more planning than the comfortable months.

March in Siem Reap

March in Siem Reap typically brings daytime highs around 98F (37C) and nighttime lows near 77F (25C). Expect some rain, averaging about 1.8 inches, and average winds near 3 mph. In real life, the afternoons can feel harsh, and long walks are best kept to early morning, evening, or shaded routes with air-conditioned breaks.

Outdoor comfort is one of the least comfortable periods of the year for most travelers. Pack light breathable clothing, strong sun protection, a refillable water bottle. Verdict: March is the weakest weather month in Siem Reap, even if prepared travelers can still make it work.

April in Siem Reap

April in Siem Reap typically brings daytime highs around 96F (36C) and nighttime lows near 78F (26C). Expect moderate rain, averaging about 3.2 inches, and average winds near 3 mph. In real life, the heat can feel sticky and draining, especially when clouds build and the air does not cool much after sunset.

Outdoor comfort is too hot for many travelers for most travelers. Pack light breathable clothing, strong sun protection, a refillable water bottle, a compact umbrella or rain shell. Verdict: April is weather-challenging in Siem Reap and needs more planning than the comfortable months.

May in Siem Reap

May in Siem Reap typically brings daytime highs around 93F (34C) and nighttime lows near 78F (26C). Expect moderate rain, averaging about 5.8 inches, and average winds near 3 mph. In real life, the heat can feel sticky and draining, especially when clouds build and the air does not cool much after sunset.

Outdoor comfort is not ideal for most travelers. Pack light breathable clothing, strong sun protection, a refillable water bottle, a compact umbrella or rain shell. Verdict: May is not one of the better months for weather in Siem Reap.

June in Siem Reap

June in Siem Reap typically brings daytime highs around 89F (32C) and nighttime lows near 77F (25C). Expect heavy rain, averaging about 7.0 inches, and average winds near 4 mph. In real life, the heat can feel sticky and draining, especially when clouds build and the air does not cool much after sunset.

Outdoor comfort is rainy and less reliable for most travelers. Pack light clothing, sunglasses, a light layer for evenings, a compact umbrella or rain shell. Verdict: June is possible, but it is not one of the easier weather months in Siem Reap.

July in Siem Reap

July in Siem Reap typically brings daytime highs around 87F (31C) and nighttime lows near 76F (24C). Expect heavy rain, averaging about 8.0 inches, and average winds near 4 mph. In real life, this is warm to hot city weather; it can still work, but midday walking needs shade, water, and a flexible pace.

Outdoor comfort is rainy and less reliable for most travelers. Pack light clothing, sunglasses, a light layer for evenings, a compact umbrella or rain shell. Verdict: July is possible, but it is not one of the easier weather months in Siem Reap.

August in Siem Reap

August in Siem Reap typically brings daytime highs around 87F (30C) and nighttime lows near 76F (24C). Expect heavy rain, averaging about 8.2 inches, and average winds near 4 mph. In real life, this is warm to hot city weather; it can still work, but midday walking needs shade, water, and a flexible pace.

Outdoor comfort is rainy and less reliable for most travelers. Pack light clothing, sunglasses, a light layer for evenings, a compact umbrella or rain shell. Verdict: August is possible, but it is not one of the easier weather months in Siem Reap.

September in Siem Reap

September in Siem Reap typically brings daytime highs around 86F (30C) and nighttime lows near 76F (24C). Expect heavy rain, averaging about 9.7 inches, and average winds near 3 mph. In real life, this is warm to hot city weather; it can still work, but midday walking needs shade, water, and a flexible pace.

Outdoor comfort is rainy and less reliable for most travelers. Pack light clothing, sunglasses, a light layer for evenings, a compact umbrella or rain shell. Verdict: September is possible, but it is not one of the easier weather months in Siem Reap.

October in Siem Reap

October in Siem Reap typically brings daytime highs around 87F (31C) and nighttime lows near 74F (24C). Expect moderate rain, averaging about 5.6 inches, and average winds near 3 mph. In real life, this is warm to hot city weather; it can still work, but midday walking needs shade, water, and a flexible pace.

Outdoor comfort is manageable with planning for most travelers. Pack light clothing, sunglasses, a light layer for evenings, a compact umbrella or rain shell. Verdict: October is a good month for weather in Siem Reap.

November in Siem Reap

November in Siem Reap typically brings daytime highs around 88F (31C) and nighttime lows near 72F (22C). Expect some rain, averaging about 1.5 inches, and average winds near 3 mph. In real life, this is warm to hot city weather; it can still work, but midday walking needs shade, water, and a flexible pace.

Outdoor comfort is the best of the year for most travelers. Pack light clothing, sunglasses, a light layer for evenings. Verdict: November is one of the best weather months in Siem Reap.

December in Siem Reap

December in Siem Reap typically brings daytime highs around 90F (32C) and nighttime lows near 69F (20C). Expect dry weather, with only about 0.2 inches of rain, and average winds near 4 mph. In real life, this is warm to hot city weather; it can still work, but midday walking needs shade, water, and a flexible pace.

Outdoor comfort is good, with a few weather tradeoffs for most travelers. Pack light clothing, sunglasses, a light layer for evenings. Verdict: December is a good month for weather in Siem Reap.

Month-by-Month Weather Table for Siem Reap

Hottest Time of Year in Siem Reap

The hottest time of year in Siem Reap is usually February, March, and April. The hottest month in Siem Reap is March, with average highs near 98F (37C) and nights around 77F (25C). If humidity or strong sun is present, the heat can feel more demanding than the average high suggests.

Early mornings and evenings are usually better than midafternoon during this period. If the hot months overlap with summer vacation or peak travel, the city may still be busy, but from a weather perspective this is not automatically the most comfortable time to visit.

Coldest Time of Year in Siem Reap

The coldest time of year in Siem Reap is usually January and December. The coldest month in Siem Reap is December, with average lows near 69F (20C) and daytime highs around 90F (32C). Snow is not the main issue, but cool mornings, wind, rain, or shorter daylight can still affect comfort.

Rainiest, Snowiest, or Most Humid Months in Siem Reap

The rainiest month is usually September, with about 9.7 inches of rain. This is the month when showers, humidity, storms, or wet pavement are most likely to shape the trip. It can still be possible, but it is less reliable for outdoor-heavy plans.

Driest and Clearest Months in Siem Reap

The driest month in Siem Reap is usually December, with about 0.2 inches of precipitation. The broader dry-weather window often includes January, February, and December. These months are generally better for walking, photos, outdoor meals, and day trips because the odds of weather interruptions are lower.

Most Unpredictable Weather Period in Siem Reap

The most unpredictable weather period in Siem Reap is usually the summer rainy period. During this stretch, travelers should expect the forecast to matter more than the calendar. Pack flexible layers, check conditions before long walks, and avoid building a trip around only one kind of weather.

Best Weather for First-Time Visitors

For a first-time trip, the best weather window is usually January, November, and December. This period gives the strongest balance of mild temperatures, manageable rain, outdoor comfort, and enough daylight for a relaxed city schedule. It is also the period most likely to answer the question of when is the weather best in Siem Reap without asking travelers to tolerate the year’s worst heat, cold, or wet weather.

When to Avoid Siem Reap Because of Weather

Consider avoiding February, March, April, May, July if your trip depends on comfortable walking weather. These months are more likely to be too hot, too cold, too wet, too snowy, or simply less pleasant than the better parts of the year.

Families with kids, older travelers, photographers, and visitors who want to walk a lot should be especially careful with the worst weather months. Travelers who dislike heat should avoid the hottest stretch around February, March, and April; travelers who dislike cold should avoid the coldest stretch around January and December; travelers who dislike rain should be cautious around September.

Final Weather Verdict: When Should You Visit Siem Reap?

The best month to visit Siem Reap for weather is November. The worst month to visit Siem Reap is March. The best season overall is usually Winter, while the best mild-weather period for a first-time visitor is January, November, and December.

If you want the best month to visit Siem Reap, choose the month that gives you comfortable daytime temperatures and the lowest risk of weather disrupting outdoor plans. If you are comparing Siem Reap weather by month, do not look only at the hottest month in Siem Reap or the coldest month in Siem Reap. Rain, snow, wind, humidity, and daylight can matter just as much.

For most travelers, the practical answer is simple: visit during the comfortable middle of the Siem Reap seasons, avoid the most extreme month if you can, and pack for the specific weather pattern of your chosen dates.