Climate Chart of Phnom Penh, Cambodia
Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023
For Phnom Penh, Cambodia, the climate data describe 2013–2023. Monthly mean temperatures remain warm across the year, with the supplied monthly extremes ranging from December at 26.3 °C to March at 29.7 °C. The rainfall and sunshine figures add a more varied picture for planning: mean daily rainfall has a pronounced low and high among the reported monthly averages, while daily sunshine also reaches its recorded maximum and minimum in different months.
Climate overview
Temperature
The monthly mean temperature is highest in March, at 29.7 °C, and lowest in December, at 26.3 °C. These are averages for each month, not daytime maximum temperatures, so they describe the broader monthly pattern rather than the hottest conditions a visitor might experience on an individual day. The unweighted mean of the monthly means is 27.8 °C; it summarizes the supplied monthly averages without weighting months by their number of days.
Rain
Mean daily rainfall is lowest in February, at 0.46 mm/day, and highest in September, at 9.27 mm/day. The figures are daily averages within each month, not monthly rainfall totals, and they do not show how often rain falls or whether a particular day will be wet. Across the calendar months, the unweighted mean of these monthly daily averages is 4.38 mm/day; use it as a broad summary rather than a day-weighted annual figure.
Sunshine
Mean daily sunshine reaches its highest monthly value in March, at 10.99 hours/day, and its lowest in September, at 7.97 hours/day. These averages can help indicate how sunshine duration varies across the year, but they are not measures of day length and cannot guarantee the conditions on a particular day. The unweighted mean across the monthly sunshine averages is 9.56 hours/day.
Best Travel Time Guide for Phnom Penh, Cambodia: Ideal Seasons and Weather Insights
For visitors prioritising lower average rainfall, February is the conditional option in this dataset: mean daily rainfall is 0.46 mm/day. That average does not guarantee dry days or quantify rain frequency, so retain flexible plans and consider rain protection rather than treating the figure as a promise. If you are planning outdoor sightseeing around cooler monthly averages, December is the relevant month, with a monthly mean temperature of 26.3 °C; this is not a daytime high or a forecast for any particular visit. For sunshine-led planning, mean daily sunshine is highest in March at 10.99 hours/day and lowest in September at 7.97 hours/day. Sunshine duration is not day length, and these criteria point to different considerations rather than establishing one universally best time to visit. For rain preparation, September has the highest supplied mean daily rainfall, at 9.27 mm/day, making rain-ready clothing or a compact umbrella sensible considerations for plans then. The average does not indicate the chance of rain on a specific day, so check conditions nearer your departure.
Climate Data Overview for Phnom Penh, Cambodia
Explore the comprehensive climate data for Phnom Penh, Cambodia. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.
| Month | Average: Temperature °C | Rain (mm) / day | Snow (mm) / day | Sunshine (h) / day |
|---|---|---|---|---|
| Jan | 26.8 | 0.57 | 0.00 | 9.96 |
| Feb | 28.0 | 0.46 | 0.00 | 10.53 |
| Mar | 29.7 | 1.16 | 0.00 | 10.99 |
| Apr | 29.5 | 3.57 | 0.00 | 10.85 |
| May | 29.2 | 5.14 | 0.00 | 10.26 |
| Jun | 28.3 | 5.41 | 0.00 | 9.26 |
| Jul | 27.8 | 5.77 | 0.00 | 8.33 |
| Aug | 27.8 | 6.34 | 0.00 | 8.84 |
| Sep | 27.1 | 9.27 | 0.00 | 7.97 |
| Oct | 26.8 | 9.03 | 0.00 | 8.67 |
| Nov | 26.9 | 4.69 | 0.00 | 9.54 |
| Dec | 26.3 | 1.14 | 0.00 | 9.47 |
| Average | 27.8 | 4.38 | 0.00 | 9.56 |
