Phnom Penh, Cambodia Climate & Monthly Averages
The climate of Phnom Penh
Phnom Penh has a tropical wet-and-dry climate, marked by year-round warmth split between a rainy season and a pronounced dry season. Average daytime highs range from about 87°F (30°C) in December to around 94°F (35°C) in April, and the city records roughly 199 days of measurable precipitation a year.
Climate quick facts
- Hottest month: April - highs near 94°F (35°C)
- Coldest month: December - highs near 87°F (30°C)
- Record high: 103°F (39°C) · Record low: 65°F (18°C) (2015–2024)
- Wettest month: October (25 rainy days) · Sunniest: March (11.4 h sun/day)
- Climate type: tropical wet-and-dry - year-round warmth split between a rainy season and a pronounced dry season
Temperatures through the year
The warmest stretch of the year centers on April. Highs average 94°F (35°C) and overnight lows stay near 79°F (26°C). The coolest month is December, with typical highs of 87°F (30°C) and lows around 74°F (23°C). Based on 2015–2024 weather data, temperatures have reached as high as 103°F (39°C) and dropped as low as 65°F (18°C).
Rain, sun and snow
October is usually the wettest month. It brings about 12.0 inches (306 mm) of rain over 25 days, while February is the driest. March brings the most sunshine, averaging 11.4 hours of sun a day.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 89° | 74° | 4 | 0.7 in | 10.4 h/day | 67% |
| February | 91° | 74° | 2 | 0.6 in | 11.0 h/day | 62% |
| March | 94° | 77° | 5 | 1.5 in | 11.4 h/day | 63% |
| April | 94° | 79° | 14 | 3.7 in | 11.2 h/day | 69% |
| May | 92° | 80° | 25 | 7.0 in | 10.1 h/day | 77% |
| June | 90° | 78° | 24 | 6.4 in | 9.3 h/day | 79% |
| July | 89° | 78° | 24 | 7.4 in | 8.4 h/day | 80% |
| August | 90° | 78° | 26 | 8.2 in | 9.0 h/day | 80% |
| September | 88° | 77° | 28 | 11.7 in | 8.0 h/day | 85% |
| October | 87° | 76° | 25 | 12.0 in | 8.7 h/day | 85% |
| November | 87° | 76° | 16 | 6.0 in | 9.8 h/day | 80% |
| December | 87° | 74° | 7 | 1.6 in | 9.9 h/day | 72% |
Phnom Penh month by month
Phnom Penh weather in January
January brings highs around 89°F (31°C), lows near 74°F (23°C), about 4 wet days.
Phnom Penh weather in February
February brings highs around 91°F (33°C), lows near 74°F (24°C), about 2 wet days - typically the driest month of the year in Phnom Penh.
Phnom Penh weather in March
March brings highs around 94°F (34°C), lows near 77°F (25°C), about 5 wet days - typically the sunniest month of the year in Phnom Penh.
Phnom Penh weather in April
April brings highs around 94°F (35°C), lows near 79°F (26°C), about 14 wet days - typically the hottest month of the year in Phnom Penh.
Phnom Penh weather in May
May brings highs around 92°F (34°C), lows near 80°F (26°C), about 25 wet days.
Phnom Penh weather in June
June brings highs around 90°F (32°C), lows near 78°F (26°C), about 24 wet days.
Phnom Penh weather in July
July brings highs around 89°F (32°C), lows near 78°F (25°C), about 24 wet days.
Phnom Penh weather in August
August brings highs around 90°F (32°C), lows near 78°F (25°C), about 26 wet days.
Phnom Penh weather in September
September brings highs around 88°F (31°C), lows near 77°F (25°C), about 28 wet days.
Phnom Penh weather in October
October brings highs around 87°F (30°C), lows near 76°F (24°C), about 25 wet days - typically the wettest month of the year in Phnom Penh.
Phnom Penh weather in November
November brings highs around 87°F (31°C), lows near 76°F (24°C), about 16 wet days.
Phnom Penh weather in December
December brings highs around 87°F (30°C), lows near 74°F (23°C), about 7 wet days - typically the coldest month of the year in Phnom Penh.
Seasons in Phnom Penh
March through May
March through May in Phnom Penh is intensely hot, with daytime highs averaging 94°F (34°C) and nights around 79°F (26°C); expect showers on roughly 43 days across the season. With the humidity factored in, afternoons often feel hotter than the thermometer reads - run the numbers through the humidity and dew point converter to see why.
June through August
June through August in Phnom Penh brings hot afternoons, with daytime highs averaging 90°F (32°C) and nights around 78°F (25°C); expect showers on roughly 74 days across the season.
September through November
September through November in Phnom Penh runs hot, with daytime highs averaging 87°F (31°C) and nights around 76°F (24°C); expect showers on roughly 69 days across the season.
December through February
December through February in Phnom Penh is hot, with daytime highs averaging 89°F (32°C) and nights around 74°F (23°C); rain falls on about 13 days over the three months.
Climate questions, answered
What is the average temperature in Phnom Penh?
Is Phnom Penh hot in summer?
Is Phnom Penh cold in winter?
How many rainy days does Phnom Penh get in a year?
Best time to visit Phnom Penh
The best time to visit Phnom Penh is generally November to February, when these months combine the driest skies with the most comfortable heat. Daytime temperatures in that window typically sit near 88°F (31°C).
Pack for Phnom Penh with lightweight, breathable clothing and strong sun protection for the hot months; a compact umbrella or rain shell - showers are a regular feature; moisture-wicking fabrics to cope with the humidity. Evenings can feel noticeably cooler than afternoons - April nights average 79°F (26°C).
Phnom Penh temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.