Siem Reap Weather Forecast
Siem Reap weather: 82°F, overcast. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
14-day forecast for Siem Reap
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Tue, Aug 25 | 🌦️ Light drizzle | 91° / 80° | 92% · 0,0 in | 16 mph | 9 |
| Wed, Aug 26 | 🌦️ Light showers | 91° / 79° | 100% · 0,2 in | 15 mph | 8 |
| Thu, Aug 27 | ⛈️ Thunderstorm | 91° / 78° | 94% · 0,2 in | 13 mph | 9 |
| Fri, Aug 28 | ⛈️ Thunderstorm | 90° / 78° | 86% · 0,1 in | 15 mph | 8 |
| Sat, Aug 29 | 🌦️ Light drizzle | 88° / 79° | 94% · 0,0 in | 16 mph | 7 |
| Sun, Aug 30 | 🌦️ Light drizzle | 87° / 78° | 67% · 0,0 in | 13 mph | 9 |
| Mon, Aug 31 | 🌦️ Light drizzle | 87° / 78° | 65% · 0,0 in | 14 mph | 7 |
| Tue, Sep 1 | 🌦️ Light drizzle | 91° / 78° | 73% · 0,0 in | 13 mph | 2 |
| Wed, Sep 2 | ⛈️ Thunderstorm | 92° / 78° | 82% · 0,3 in | 13 mph | 1 |
| Thu, Sep 3 | 🌦️ Light showers | 88° / 76° | 86% · 0,5 in | 16 mph | 2 |
| Fri, Sep 4 | ⛈️ Thunderstorm | 82° / 77° | 92% · 1,1 in | 8 mph | 7 |
| Sat, Sep 5 | ⛈️ Thunderstorm | 88° / 77° | 86% · 0,4 in | 9 mph | 2 |
| Sun, Sep 6 | 🌦️ Light showers | 78° / 76° | 92% · 1,1 in | 9 mph | 4 |
| Mon, Sep 7 | 🌦️ Drizzle | 82° / 76° | 88% · 0,4 in | 8 mph | 4 |
The two-week trend
Cooling. The second half of the window averages 35°F cooler than the days immediately ahead.
The window averages 88°F against a August normal of 91°F - right on average.
The next 7 days look unusually dry - roughly 39% of a normal August week (0,6 in against 1,5 in).
What this means for Siem Reap
Today is about average for August. The forecast high of 91°F is in line with the 91°F typical for this month.
A 92% chance means rain is expected over most of the area. Plan indoor alternatives.
Gusts to 35 mph will push high-sided vehicles on exposed roads and bridges. Wet roads are likely; braking distances roughly double in heavy rain.
Within 15 degrees of the equator, day length barely changes all year; seasons are defined by rain, not temperature.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 43°F - an unusually even climate through the year.
What to pack, what to skip
- Lightweight, light-coloured clothing and a refillable water bottle
- Sunglasses, a brimmed hat and SPF 30+
- A packable rain shell - 7 of the next 7 days carry a real chance of rain
- Insect repellent and quick-dry fabrics for humidity
- Avoid exposed ridgelines, small boats and rooftop viewpoints while gusts stay above 35 mph.
- If your dates are flexible, avoid May, July and September - historically the least comfortable months here.
See the Siem Reap forecast by time range
Siem Reap weather - more answers
Explore Siem Reap
Every topic we hold for this place, and the same topic for the places around it.
Weather for related places
Frequently asked questions
Where is Siem Reap?
Siem Reap is a city in Cambodia. Its coordinates are 13.3671, 103.8448. It lies in Asia.
What is the weather like in Siem Reap right now?
It is currently 82°F (28°C) with overcast. Humidity is 76% and wind is 9 mph.
When is the best time to visit Siem Reap?
January, February and December offer the most comfortable conditions in Siem Reap, which has a tropical climate. May, July and September are usually the hardest months for outdoor plans.
What time zone is Siem Reap in?
Siem Reap observes Asia/Phnom_Penh (UTC+07:00). The local time is 1:09 AM.
How many people live in Siem Reap?
Siem Reap has a population of approximately 245.000.
What is the nearest airport to Siem Reap?
The closest airports are Suvarnabhumi Airport (BKK), 209 mi away.
What are the top things to do in Siem Reap?
Popular options include Angkor Wat, Angkor and Grand Palace.
What places are in Siem Reap?
Siem Reap covers 2 places in this atlas, including Angkor Wat and Angkor.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (cities-world) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 26, 2026 at 1:09 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
