Phnom Penh Temperature by Month
Phnom Penh, Phnom Penh Municipality, 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.
Phnom Penh Monthly Temperatures
The climate in Phnom Penh remains fairly constant, offering very warm temperatures throughout the year. Maximum daytime temperatures reach a very hot 37°C (99°F) in April, dropping to a very warm 33°C (91°F) in January. Nighttime lows stay between 27°C (81°F) and 23°C (73°F).
The chart below illustrates the average maximum day and minimum night temperatures in Phnom Penh by month:
The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. April, the warmest month, gets 241 hours of sunshine.
The chart below shows the average temperature throughout the year:
Historical Phnom Penh Temperatures: 1989-2026
Browse day-by-day temperature records for Phnom Penh spanning 38 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Phnom Penh 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
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Phnom Penh vs World: Temperature Compared
Phnom Penh'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:
Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.
Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.
Buenos Aires, Argentina averages 23°C (73°F) a year, with hot summers and mild winters — and seasons reversed compared to Europe.
Melbourne, Australia averages 20°C (68°F) annually — known for unpredictable weather, with four seasons sometimes happening in one day.
What Does the Temperature Feel Like in Phnom Penh?
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 Phnom Penh, January is the coolest month, with average highs of 34°C (93°F) and humidity around 72% — considered high. In April, the warmest month, temperatures average 37°C (99°F) with 73% humidity — conditions that feel high. 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 Phnom Penh's weather — including monthly rainfall, sunshine hours, and humidity — visit our Phnom Penh climate page.
