Climate and Average Weather Year Round in Cambodia

We show the climate in Cambodia by comparing the average weather in 2 representative places: Phnom Penh and Siem Reap.

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Phnom Penh
Siem Reap

Average High and Low Temperature in Cambodia

Average High and Low Temperature in CambodiaJanFebMarAprMayJunJulAugSepOctNovDec70°F70°F75°F75°F80°F80°F85°F85°F90°F90°F95°F95°F100°F100°F105°F105°F8173968681709584861059110287NowNowPhnom PenhPhnom PenhSiem ReapSiem Reap
The daily average high and low air temperature at 2 meters above the ground. The thin dotted lines are the corresponding perceived temperatures.
Phnom Penh 88°F91°F94°F95°F94°F92°F90°F90°F89°F87°F87°F87°F
Siem Reap 87°F90°F94°F95°F93°F90°F88°F88°F87°F86°F86°F85°F
Phnom Penh 73°F75°F78°F80°F80°F79°F79°F78°F78°F78°F76°F73°F
Siem Reap 71°F74°F78°F81°F81°F80°F79°F79°F79°F78°F75°F71°F

Phnom Penh

Average Hourly Temperature in Phnom PenhJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowwarmwarmhotcomfortablecomfortable

Siem Reap

Average Hourly Temperature in Siem ReapJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowwarmhotcomfortablecomfortable
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Chance of Clearer Skies in Cambodia

Chance of Clearer Skies in CambodiaJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%49855NowNowPhnom PenhPhnom PenhSiem ReapSiem Reap
The percentage of time the sky is clear, mostly clear, or partly cloudy (i.e., less than 60% of the sky is covered by clouds).
Clearer SkiesJanFebMarAprMayJunJulAugSepOctNovDec
Phnom Penh 45%48%38%20%11%10%11%9%11%19%31%42%
Siem Reap 53%53%40%19%11%9%9%8%11%21%37%51%

Daily Chance of Precipitation in Cambodia

Daily Chance of Precipitation in CambodiaJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%666722NowNowPhnom PenhPhnom PenhSiem ReapSiem Reap
The percentage of days in which precipitation is observed, excluding trace quantities.
Days of Precip.JanFebMarAprMayJunJulAugSepOctNovDec
Phnom Penh 1.9d2.1d3.8d7.5d13.5d17.4d18.5d19.1d18.8d17.2d8.8d3.0d
Siem Reap 1.3d2.4d5.2d8.9d16.4d18.8d20.3d21.5d20.7d13.8d4.6d0.9d

Average Monthly Rainfall in Cambodia

Average Monthly Rainfall in CambodiaJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in7. PenhPhnom PenhSiem ReapSiem Reap
The average rainfall accumulated over the course of a sliding 31-day period centered on the day in question.
Phnom Penh 0.3″0.4″0.7″1.8″4.2″6.8″6.8″7.5″7.2″5.5″2.4″0.6″
Siem Reap 0.2″0.5″1.1″2.2″4.7″6.7″7.1″8.1″8.4″4.5″1.1″0.2″

Hours of Daylight in Cambodia

Hours of Daylight in CambodiaJanFebMarAprMayJunJulAugSepOctNovDec4 hr4 hr6 hr6 hr8 hr8 hr10 hr10 hr12 hr12 hr14 hr14 hr16 hr16 hr18 hr18 hr20 hr20 hr12.811.4NowNowPhnom PenhPhnom PenhSiem ReapSiem Reap
The number of hours during which the Sun is at least partly above the horizon.
Phnom Penh 11.5h11.8h12.1h12.4h12.7h12.8h12.7h12.5h12.2h11.9h11.6h11.5h
Siem Reap 11.4h11.7h12.1h12.4h12.7h12.9h12.8h12.6h12.2h11.8h11.5h11.4h

Chance of Muggy Conditions in Cambodia

Chance of Muggy Conditions in CambodiaJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%1006510055NowNowPhnom PenhPhnom PenhSiem ReapSiem Reap
The percentage of time that is muggy, oppressive, or miserable (i.e., a dew point greater than 65°F).
Muggy daysJanFebMarAprMayJunJulAugSepOctNovDec
Phnom Penh 20.5d22.7d27.7d29.1d30.8d30.0d31.0d31.0d30.0d30.9d28.8d24.1d
Siem Reap 17.3d20.3d26.5d28.5d30.8d30.0d31.0d31.0d30.0d30.7d27.5d21.3d

Average Wind Speed in Cambodia

Average Wind Speed in CambodiaJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mph7. PenhPhnom PenhSiem ReapSiem Reap
The average of mean hourly wind speeds at 10 meters above the ground.
Wind Speed (mph)JanFebMarAprMayJunJulAugSepOctNovDec
Phnom Penh
Siem Reap

Tourism Score in Cambodia

Tourism Score in CambodiaJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.72.16.7NowNowPhnom PenhPhnom PenhSiem ReapSiem Reap
The tourism score, which favors clear, rainless days with perceived temperatures between 65°F and 80°F.

Beach/Pool Score in Cambodia

Beach/Pool Score in CambodiaJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.94.1NowNowPhnom PenhPhnom PenhSiem ReapSiem Reap
The beach/pool score, which favors clear, rainless days with perceived temperatures between 75°F and 90°F.

Growing Season in Cambodia

Growing Season in CambodiaJanFebMarAprMayJunJulAugSepOctNovDec0%0%20%20%40%40%60%60%80%80%100%100%NowNowPhnom PenhPhnom PenhSiem ReapSiem Reap
The percentage chance that a given day is within the growing season, defined as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Growing Degree Days in Cambodia

Growing Degree Days in CambodiaJanFebMarAprMayJunJulAugSepOctNovDec2,000°F2,000°F4,000°F4,000°F6,000°F6,000°F8,000°F8,000°F10,000°F10,000°F12,000°F12,000°FNowNowPhnom PenhPhnom PenhSiem ReapSiem Reap
The average growing degree days accumulated over the course of the year, where growing degree days are defined as the integral of warmth above a base temperature (50°F in this case).

Average Daily Incident Shortwave Solar Energy in Cambodia

Average Daily Incident Shortwave Solar Energy in CambodiaJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh6.43.96.0NowNowPhnom PenhPhnom PenhSiem ReapSiem Reap
The average daily shortwave solar energy reaching the ground per square meter.
Solar Energy (kWh)JanFebMarAprMayJunJulAugSepOctNovDec
Phnom Penh
Siem Reap

This report illustrates the typical weather for Phnom Penh and Siem Reap year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

The details of the data sources used on this page vary between places and are discussed in detail on each place's dedicated page:


The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

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