Weather in Phnom Penh

Live weather and 7-day forecast for Phnom Penh, Cambodia, followed by what to expect in each month of the year.

Sunrise 05:51 Sunset 17:40 Daylight 11h 49m Sun times →

Climate in Phnom Penh: month by month

Averaged over 2023–2025, the warmest month in Phnom Penh is April, with highs around 36 °C (96 °F) and lows around 26 °C (79 °F); the coolest is January, with highs around 31 °C (87 °F) and lows around 22 °C (71 °F). Temperatures barely change through the year — the monthly averages stay within 5 °C of each other.

Phnom Penh gets about 2,062 mm (81 in) of precipitation a year. The wettest month is September (384 mm over about 27 days) and the driest is January (20 mm).

Month	Avg high	Avg low	Precipitation (mm)	Wet days	Daylight
January	31°	22°	20	2	11h 31m
February	33°	23°	20	3	11h 46m
March	34°	25°	33	4	12h 3m
April	36°	26°	75	12	12h 23m
May	34°	26°	237	26	12h 39m
June	33°	26°	205	24	12h 48m
July	32°	25°	238	26	12h 44m
August	33°	25°	253	28	12h 31m
September	31°	25°	384	27	12h 12m
October	31°	24°	378	29	11h 53m
November	31°	24°	171	15	11h 36m
December	31°	23°	48	6	11h 27m

Averages of daily values from the ERA5 reanalysis for 2023–2025 at Phnom Penh's coordinates (model elevation 14 m), via Open-Meteo (CC BY 4.0). Three recent years are not a 30-year climate normal; reanalysis smooths local extremes and tends to count more light-rain days than a rain gauge would. Daylight is sunrise to sunset on the 15th of each month.

Weather questions for Phnom Penh

What is the hottest month in Phnom Penh?

April, with average highs of 36 °C (96 °F) and lows of 26 °C (79 °F) over 2023–2025. The coolest month is January, averaging 31 °C (87 °F) by day and 22 °C (71 °F) at night.

What is the rainiest month in Phnom Penh?

September, with about 384 mm of precipitation on roughly 27 days. The driest month is January (20 mm), and the yearly total is around 2,062 mm.

When is the weather mildest in Phnom Penh?

No month in Phnom Penh has average highs between 18 °C and 27 °C (64–81 °F). The coolest month, January, averages highs of 31 °C (87 °F).

More about Phnom Penh

Time & Time Zone

Local time, IANA designation, coordinates.

Sunrise & Sunset

Today's solar data with monthly table.

Moon Phase

Current phase, moonrise, and moonset.

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About this forecast

The live forecast comes from Open-Meteo, which blends models from national weather services and is fetched fresh in your browser on each visit. Times in the hourly outlook are Phnom Penh local time (Asia/Phnom_Penh).