Phnom Penh weather in January
Temperature, rain and sunshine in January: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in January
Good
Best time to visit: December – January
What is the weather like in Phnom Penh in January?
In January, Phnom Penh is hot: daytime highs average 32 °C, and even at night it stays warm at around 23 °C. The sun shines for around 8 hours a day. Rain is rare: about 3 days bring 16 mm in total. On about 26 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, January is a good month for a holiday in Phnom Penh.
January compared
How the weather changes from December to February. Tap a month to open it.
| DecemberDec | JanuaryJan | FebruaryFeb | |
|---|---|---|---|
| Score | 68 | 67 | 58 |
| Day | 30° | 32° | 33° |
| Night | 23° | 23° | 24° |
| Sun | 7 h | 8 h | 8 h |
| Rain days | 6 | 3 | 2 |
More details for January
- Daylight
- 11 h 31 min06:24 – 17:54
- UV index
- 9 · very highclear sky, noon (estimate)All months
- Muggy days
- 20 daysdew point 18 °C or moreAll months
- Wind
- 13 km/haverage daily peakAll months
- Cloud cover
- 57 %on averageAll months
- Hot days
- 26 days30 °C or moreAll months
- Time zone
- UTC+7Asia/Phnom_Penh
How the score comes together
- Temperatureweight 50 %44 %
- Sunshineweight 20 %75 %
- Few rainy daysweight 30 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in January
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
Phnom Penh in January: quick answers
Is Phnom Penh hot in January?
Yes. In January, Phnom Penh is hot: daytime highs average 32 °C and nights stay around 23 °C. On about 26 days the thermometer climbs to 30 °C or more.
Does it rain much in Phnom Penh in January?
Rain is rare: about 3 days bring 16 mm in total.
Phnom Penh month by month
The whole year in Phnom PenhAll destinations: CambodiaWhere to go in January
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