Phnom Penh, Cambodia Weather
Phnom Penh hourly forecast: next 24 hours
Today's high of 93°F (34°C) is about 3°F (2°C) above the typical August high of 90°F (32°C).
Current conditions in detail
Phnom Penh weather tomorrow (Friday, August 28)
Tomorrow in Phnom Penh looks overcast, with a high of 91° and an overnight low of 79°. There is a 61% chance of rain - plan accordingly. Winds top out near 23 mph, and the UV index reaches 10 (very high).
Phnom Penh 14-day forecast
About the weather in Phnom Penh
Temperature barely moves in Phnom Penh - 3°C between the average April and the average December. Rainfall does the work instead: 12.0 inches (306 mm) in October against 14 mm (0.6 in) in February.
Phnom Penh weather: quick facts
- Hottest month: April - highs near 94°F (35°C)
- Coldest month: December - highs near 87°F (30°C)
- Decade extremes (2015-2024): 103°F (39°C) high · 65°F (18°C) low
- Wettest month: October (25 rainy days) · Sunniest: March (11.4 h sun/day)
- Climate type: tropical wet-and-dry
- Annual swing: 3°C between the average warmest and coolest month · day to night: 7°C
- Months averaging 30°C or hotter: 12
- Average humidity: 75%
Temperatures through the year
Average highs hold at or above 30°C for 12 months of the year, January through December being the unbroken run. December is the coolest month, with highs of 87°F (30°C) and lows near 74°F (23°C). April is the warm end of the year, averaging 94°F (35°C) by day and 79°F (26°C) overnight. Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 103°F (39°C) and the lowest daily minimum 65°F (18°C). The wettest month is October (12.0 inches (306 mm) across 25 days) and the driest February.
Rain, sun and snow
Between the average April and the average December lie 3°C, a narrower spread than all but 9% of the 3496 cities in our dataset.
Season by season
March through May
Through March through May, Phnom Penh brings serious heat: 94°F (34°C) by day, 79°F (26°C) after dark, and rain falls on around 43 of the 90 days. Daylight is generous - around 10.9 hours of sun a day. With the moisture factored in, afternoons feel hotter than the reading suggests - the humidity and dew point converter shows why.
June through August
June through August is hot here - highs near 90°F (32°C), nights near 78°F (25°C), and rain falls on around 74 of the 90 days.
September through November
September through November in Phnom Penh is hot, with daytime highs averaging 87°F (31°C) and nights around 76°F (24°C); rain falls on around 69 of the 90 days.
December through February
December through February in Phnom Penh brings hot afternoons, with daytime highs averaging 89°F (32°C) and nights around 74°F (23°C); rain comes on about 13 days over the three months. Daylight is generous - around 10.4 hours of sun a day.
Average temperatures in Phnom Penh by month
| 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% |