Phnom Penh weather in January
In January, Phnom Penh has an average high of 34 °C93 °F and an average low of 22 °C71 °F, with about 16 mm0.6 in of precipitation. It is the 6th warmest month of the year and ranks 11th for precipitation.
How January compares with other months
Compared with December, January is 1 °C1.8 °F warmer on average and drier by 11 mm0.5 in. Compared with February, January is 2 °C3.6 °F cooler on average. Daylight lasts about 11.5 hours around the middle of the month. Average relative humidity is 61% and the average cloud amount 51%.
Is January a good time to visit Phnom Penh?
January is not among the most comfortable months by our comfort score: it is hot (average high 34 °C93 °F). The most comfortable months in Phnom Penh are December.
What to wear in January
For Phnom Penh in January, pack very light, breathable clothing, a sun hat and plenty of water.
January in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Phnom Penh | 3493 | 2271 | 160.6 |
| Takeo | 3392 | 2170 | 170.7 |
| Tân Châu | 3392 | 2171 | 170.7 |
| Hồng Ngự | 3392 | 2170 | 130.5 |
| Tịnh Biên | 3290 | 2171 | 190.7 |
| Hòa Thành | 3493 | 2170 | 100.4 |
| Hà Tiên | 3187 | 2374 | 230.9 |
| Long Xuyên | 3290 | 2170 | 160.6 |
| Trảng Bàng | 3392 | 2170 | 110.4 |
Nearby places that are more than 1 °C1.8 °F cooler: Long Xuyên.
Other months in Phnom Penh
- January34 °C93 °F / 22 °C71 °F
- February36 °C97 °F / 23 °C74 °F
- March37 °C99 °F / 25 °C77 °F
- April36 °C98 °F / 26 °C79 °F
- May34 °C93 °F / 25 °C78 °F
- June31 °C89 °F / 24 °C76 °F
- July31 °C87 °F / 24 °C75 °F
- August30 °C87 °F / 24 °C75 °F
- September30 °C86 °F / 24 °C75 °F
- October30 °C86 °F / 24 °C75 °F
- November31 °C87 °F / 23 °C73 °F
- December32 °C89 °F / 22 °C71 °F
Frequently asked questions
How warm is Phnom Penh in January?
In January the average high in Phnom Penh is 34 °C (93 °F) and the average low is 22 °C (71 °F).
Does it rain a lot in Phnom Penh in January?
On average about 16 mm (0.6 in) of precipitation falls in January; it ranks 11th of the 12 months.
Is January the warmest month in Phnom Penh?
No. The warmest month in Phnom Penh is March, with an average high of 37 °C (99 °F). The coldest month is December, with an average low of 22 °C (71 °F).
How long is the day in Phnom Penh in January?
In the middle of January the day in Phnom Penh lasts about 11.5 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Phnom Penh in January?
The average relative humidity in January is about 61%. This is a long-term average for the whole day.
How cloudy is Phnom Penh in January?
On average about 51% of the sky is covered by cloud in January. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.