Cha Am Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows both the average monthly rainfall and the number of rainy days in Cha Am, Petchaburi Province, Thailand. These averages rely on historical data collected over 30 years, from 1990 to 2020. Let's now guide you through the details for a complete overview.

Cha Am has a relatively rainy climate with high precipitation levels, averaging 1019 mm of rainfall annually.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm)

The climate in Cha Am shows significant variation throughout the year. Expect 254 mm of precipitation during the wettest month October, distributed over 17 rainy days.

In contrast, February offers drier and sunnier days, with around 13 mm of rainfall over 2 rainy days.

October, the wettest month, has a maximum daytime temperature of 31°C. The city receives 147 hours of sunshine in this period. During the driest month February you can expect a temperature of 32°C. For more detailed insights into the city’s temperatures, visit our Cha Am Temperature page.

Annual Precipitation in Thailand

The map below shows the annual precipitation across Thailand. You can also select the different months in case you are interested in a specific month.

Amsterdam Precipitation Compared World Wide

Cha Am’s average annual precipitation is 1019 mm. Let’s compare this to some popular worldwide tourist destinations:

The city of Rome, Italy, has an average annual precipitation of 832 mm, spread fairly evenly throughout the year.

Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm of annual rainfall, mostly in the summer.

Adelaide, Australia, enjoys 511 mm of annual precipitation, with dry summers and wet winters.

Ho Chi Minh City, Vietnam, receives 1955 mm of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.

How is Precipitation Measured?

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.

Sea vs. Land Precipitation

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.

For more detailed information about Cha Am’s weather, including sunshine hours, humidity levels, and temperature data, visit our Cha Am Climate page.