Climate averages 1991–2020
Phnom Penh weather
in January.
A hot, fairly dry month: the joint 7th warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a hot month in Phnom Penh: daytime highs average 31.7°C and nights cool to about 22.6°C. By daytime temperature it is the joint 7th warmest of the 12 months.
Expect about 15 mm of rain on roughly 3 days, which makes January a fairly dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 32 min on an average January day.
The nearest other city in this atlas is Dangkao (7 km away). In January its highs average 31.7°C, about as warm as Phnom Penh, with 15 mm of rain.
Among the 8 cities listed in Cambodia, Phnom Penh ranks joint 2nd of 8 for the warmest January highs and joint 5th of 8 for the driest January (rainfall, lowest first). The mean January high of those 8 cities is 31.3°C; Phnom Penh is 0.4°C warmer than that mean.
From January to February, average highs rise by 1.6°C to 33.3°C, and monthly rainfall falls from 15 mm to 8.1 mm.
The annual picture
January 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, selected | 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 | 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
January in nearby cities
- Dangkao in JanuaryCambodia · 7 kmHigh 31.7°C · Low 22.6°C · 15 mm rain
- Takeo in JanuaryCambodia · 65 kmHigh 31.4°C · Low 22.3°C · 20 mm rain
- Kampong Chhnang in JanuaryCambodia · 81 kmHigh 31.9°C · Low 22.5°C · 10 mm rain
- Tân Châu in JanuaryVietnam · 92 kmHigh 30.9°C · Low 22.2°C · 23 mm rain
- Hồng Ngự in JanuaryVietnam · 97 kmHigh 30.8°C · Low 22.1°C · 23 mm rain
- Châu Đốc in JanuaryVietnam · 98 kmHigh 30.6°C · Low 22.1°C · 23 mm rain
- Tịnh Biên in JanuaryVietnam · 107 kmHigh 30.8°C · Low 22.1°C · 25 mm rain
- Hòa Thành in JanuaryVietnam · 136 kmHigh 32.1°C · Low 22.5°C · 18 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.