Sihanoukville Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Sihanoukville, Preah Sihanouk Province, Cambodia. These values are calculated using 30 years of data (1990–2020) to ensure accuracy. Now, let's explore all the details to give you a full picture.
Sihanoukville is known for its substantial rainfall, with annual precipitation reaching 3382 mm (133 in). While the overall climate is wet, there are notable seasonal patterns that create interesting contrasts, as demonstrated in our graph below.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
The climate in Sihanoukville shows significant variation throughout the year. Expect 583 mm (23 in) of precipitation during the wettest month July, distributed over 20 rainy days.
In contrast, February offers drier and sunnier days, with around 38 mm (1.5 in) of rainfall over 5 rainy days.
July, the wettest month, has a maximum daytime temperature of 30°C (86°F). The city receives 170 hours of sunshine in this period. During the driest month February you can expect a temperature of 30°C (86°F). For more detailed insights into the city's temperatures, visit our Sihanoukville Temperature page.
Daily Historical Precipitation
48-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in July
Explore Sihanoukville's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Sihanoukville spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Cambodia: City Comparison
The map below shows the annual precipitation across Cambodia. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Sihanoukville vs World: Rainfall Compared
Sihanoukville's average annual precipitation is 3382 mm (133 in). Let's compare this to some popular worldwide tourist destinations:
Boston, USA, experiences 1238 mm (49 in) of annual precipitation, including significant snowfall during the winter.
Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm (39 in) of annual rainfall, mostly in the summer.
Adelaide, Australia, enjoys 511 mm (20 in) of annual precipitation, with dry summers and wet winters.
Kuala Lumpur, Malaysia, receives 2529 mm (100 in) of annual rainfall, characteristic of its equatorial tropical rainforest climate, with consistent rainfall throughout the year and peak months during March and November.
Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.
Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.
The proximity of a location to a large body of water can significantly affect its rainfall patterns:
- Ocean Influence: Coastal regions typically receive more rainfall due to the presence of moisture-laden winds from the ocean. These regions tend to have more humid climates and experience more frequent precipitation, especially in winter.
- Continental Climates: Areas further from the sea, such as inland or continental regions, experience less frequent rainfall and more extreme seasonal variations in precipitation.
- The U.S. has a significant number of thunderstorms every year, with over 14.6 million taking place across the world annually.
- Approximately 70% of lightning bolts strike land rather than oceans.
- A storm named John was the longest-lasting Pacific tropical storm, continuing for 31 days. As it crossed the dateline twice, it changed status from a hurricane to a typhoon and back to a hurricane.
For more detailed information about Sihanoukville's weather, including sunshine hours, humidity levels, and temperature data, visit our Sihanoukville Climate page.
