Siem Reap Temperature by Month
Siem Reap, Siem Reap Province, Cambodia has a consistently very warm climate year-round, with daytime highs averaging 34°C (93°F). Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Siem Reap Monthly Temperatures
With little seasonal fluctuation, Siem Reap offers a predictable and steady climate. Maximum daytime temperatures reach a very hot 36°C (97°F) in April and a very warm 32°C (90°F) in December. At night, lows range from 27°C (81°F) to 22°C (72°F) throughout the year.
The chart below illustrates the average maximum day and minimum night temperatures in Siem Reap by month:
Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM.
The chart below shows the average temperature throughout the year:
Historical Siem Reap Temperatures: 1993-2026
Browse day-by-day temperature records for Siem Reap spanning 34 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Siem Reap vs Cambodia
The map below shows the annual temperature across Cambodia. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Siem Reap vs World: Temperature Compared
Siem Reap's average annual maximum temperature is 34°C (93°F). To put that in context, here's how it compares to a few well-known destinations:
Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.
Reykjavík, Iceland averages 9°C (48°F) a year — mild summers by Icelandic standards, but cold winters and frequent wind.
Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.
Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.
What Does the Temperature Feel Like in Siem Reap?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In Siem Reap, December is the coolest month, with average highs of 32°C (90°F) and humidity around 64% — considered high. In April, the warmest month, temperatures average 36°C (97°F) with 59% humidity — conditions that feel moderate. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round — large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.
For more on Siem Reap's weather — including monthly rainfall, sunshine hours, and humidity — visit our Siem Reap climate page.
