Ratchaburi Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Ratchaburi, Ratchaburi Province, Thailand. The figures are based on a 30-year period (1990–2020) to provide a reliable average. Let's explore the details to provide you with a complete overview.

Ratchaburi experiences significant rainfall throughout the year, averaging 1183 mm (47 in) of precipitation annually. However, this abundant rainfall is not evenly distributed, with a distinct dry season during certain months. You can clearly see this in our monthly precipitation graphs below.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm (0.01 in))

Ratchaburi can be quite wet during September, receiving approximately 221 mm (8.7 in) of precipitation over 19 rainy days.

In contrast December, experiences much drier conditions, with 12 mm (0.5 in) of rainfall, spread across a single rainy day.

September, the wettest month, has a maximum daytime temperature of 34°C (93°F). The city receives 107 hours of sunshine in this period. During the driest month December you can expect a temperature of 32°C (90°F). For more detailed insights into the city's temperatures, visit our Ratchaburi Temperature page.

Ratchaburi's average annual precipitation is 1183 mm (47 in). Let's compare this to some popular worldwide tourist destinations:

In Lisbon, Portugal, the average annual precipitation is 774 mm (30 in), characterized by wet winters and dry summers typical of the Mediterranean climate.

Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.

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 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 Ratchaburi's weather, including sunshine hours, humidity levels, and temperature data, visit our Ratchaburi Climate page.