Siem Reap Weather Forecast
Siem Reap weather: 78°F, light drizzle. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Risk assessment for Siem Reap
Derived from the current forecast window - not an official warning.
Peak gusts of 34 mph and 4 thunderstorm days in the next 16 days.
Wettest single day forecast at 0,3 in, 2,1 in across the window. Flash flooding risk rises sharply above 50 mm in a day.
16-day forecast for Siem Reap
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Fri, Aug 21 | 🌦️ Drizzle | 89° / 77° | 71% · 0,1 in | 12 mph | 8 |
| Sat, Aug 22 | ⛈️ Thunderstorm | 90° / 77° | 94% · 0,1 in | 14 mph | 5 |
| Sun, Aug 23 | ⛈️ Thunderstorm | 89° / 78° | 88% · 0,2 in | 15 mph | 6 |
| Mon, Aug 24 | 🌦️ Light drizzle | 85° / 78° | 73% · 0,1 in | 14 mph | 7 |
| Tue, Aug 25 | 🌦️ Light drizzle | 90° / 78° | 88% · 0,0 in | 15 mph | 6 |
| Wed, Aug 26 | ⛈️ Thunderstorm | 90° / 78° | 73% · 0,2 in | 16 mph | 8 |
| Thu, Aug 27 | 🌦️ Light drizzle | 89° / 79° | 82% · 0,1 in | 14 mph | 7 |
| Fri, Aug 28 | 🌦️ Light drizzle | 92° / 78° | 86% · 0,1 in | 11 mph | 7 |
| Sat, Aug 29 | 🌦️ Light drizzle | 89° / 78° | 82% · 0,1 in | 14 mph | 2 |
| Sun, Aug 30 | 🌧️ Heavy drizzle | 85° / 78° | 82% · 0,3 in | 13 mph | 3 |
| Mon, Aug 31 | 🌦️ Drizzle | 87° / 78° | 86% · 0,1 in | 13 mph | 1 |
| Tue, Sep 1 | ☁️ Overcast | 87° / 78° | 76% | 11 mph | 2 |
| Wed, Sep 2 | 🌦️ Light drizzle | 91° / 78° | 76% · 0,0 in | 9 mph | 5 |
| Thu, Sep 3 | ⛈️ Thunderstorm | 91° / 78° | 75% · 0,3 in | 12 mph | 8 |
| Fri, Sep 4 | 🌦️ Drizzle | 89° / 77° | 81% · 0,2 in | 16 mph | 6 |
| Sat, Sep 5 | ☀️ Clear sky | -- / -- | 65% | -- | — |
What this means for Siem Reap
Today is about average for August. The forecast high of 89°F is in line with the 91°F typical for this month.
A 71% chance means rain is expected over most of the area. Plan indoor alternatives.
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.
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 78°F (25°C) with light drizzle. Humidity is 89% and wind is 10 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 5:27 PM.
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 21, 2026 at 5:27 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
