Climate averages 1991–2020
Phnom Penh weather
in October.
A hot, very wet month: the 11th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a hot month in Phnom Penh: daytime highs average 30.4°C and nights cool to about 24.1°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 244 mm of rain on roughly 25 days, which makes October a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 53 min on an average October day.
The nearest other city in this atlas is Dangkao (7 km away). In October its highs average 30.4°C, about as warm as Phnom Penh, with 244 mm of rain.
Among the 8 cities listed in Cambodia, Phnom Penh ranks joint 1st of 8 for the warmest October highs and joint 5th of 8 for the driest October (rainfall, lowest first). The mean October high of those 8 cities is 30.0°C; Phnom Penh is 0.4°C warmer than that mean.
From October to November, average highs stay level at 30.3°C, and monthly rainfall falls from 244 mm to 78 mm.
The annual picture
October in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Phnom Penh climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 31.7°C22.6°C | 22.6°C | 15 | 3.0 | 11.512 h |
| February | 33.3°C23.6°C | 23.6°C | 8.1 | 1.7 | 11.812 h |
| March | 34.5°C25.1°C | 25.1°C | 36 | 6.1 | 12.112 h |
| April | 34.7°C25.9°C | 25.9°C | 81 | 14.6 | 12.412 h |
| May | 33.6°C25.9°C | 25.9°C | 154 | 22.7 | 12.713 h |
| June | 32.4°C25.4°C | 25.4°C | 154 | 24.3 | 12.813 h |
| July | 31.8°C25.0°C | 25.0°C | 154 | 25.5 | 12.713 h |
| August | 31.7°C24.9°C | 24.9°C | 178 | 25.9 | 12.513 h |
| September | 31.0°C24.5°C | 24.5°C | 245 | 27.1 | 12.212 h |
| October, selected | 30.4°C24.1°C | 24.1°C | 244 | 24.7 | 11.912 h |
| November | 30.3°C23.5°C | 23.5°C | 78 | 11.1 | 11.612 h |
| December | 30.5°C22.7°C | 22.7°C | 27 | 5.1 | 11.511 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
October in nearby cities
- Dangkao in OctoberCambodia · 7 kmHigh 30.4°C · Low 24.1°C · 244 mm rain
- Takeo in OctoberCambodia · 65 kmHigh 30.3°C · Low 23.7°C · 258 mm rain
- Kampong Chhnang in OctoberCambodia · 81 kmHigh 30.3°C · Low 24.0°C · 209 mm rain
- Tân Châu in OctoberVietnam · 92 kmHigh 30.6°C · Low 24.0°C · 276 mm rain
- Hồng Ngự in OctoberVietnam · 97 kmHigh 30.6°C · Low 24.0°C · 276 mm rain
- Châu Đốc in OctoberVietnam · 98 kmHigh 30.4°C · Low 23.8°C · 297 mm rain
- Tịnh Biên in OctoberVietnam · 107 kmHigh 30.4°C · Low 23.8°C · 324 mm rain
- Hòa Thành in OctoberVietnam · 136 kmHigh 30.1°C · Low 23.7°C · 257 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Phnom Penh) is explained once on the Phnom Penh year overview and on the Sources, method and limits page.
Dangkao lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.