Phnom Penh weather in August
Temperature, rain and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Poor
Best time to visit: December – January
What is the weather like in Phnom Penh in August?
In August, Phnom Penh is hot: daytime highs average 32 °C, and even at night it stays warm at around 25 °C. Expect around 5 hours of sunshine a day. It is the rainy season: rain falls on about 26 days, totalling 177 mm. On about 27 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is not an ideal month for a holiday in Phnom Penh.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 27 | 27 | 30 |
| Day | 32° | 32° | 31° |
| Night | 25° | 25° | 25° |
| Sun | 5 h | 5 h | 5 h |
| Rain days | 26 | 26 | 27 |
More details for August
- Daylight
- 12 h 31 min05:50 – 18:21
- UV index
- 13 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 15 km/haverage daily peakAll months
- Cloud cover
- 88 %on averageAll months
- Hot days
- 27 days30 °C or moreAll months
- Time zone
- UTC+7Asia/Phnom_Penh
How the score comes together
- Temperatureweight 50 %40 %
- Sunshineweight 20 %33 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in August
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Phnom Penh in August: quick answers
Is Phnom Penh hot in August?
Yes. In August, Phnom Penh is hot: daytime highs average 32 °C and nights stay around 25 °C. On about 27 days the thermometer climbs to 30 °C or more.
Does it rain much in Phnom Penh in August?
It rains often – on about 26 days, adding up to 177 mm.
Phnom Penh month by month
The whole year in Phnom PenhAll destinations: CambodiaWhere to go in August
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences