San Fernando, La Union Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in San Fernando, La Union, Luzon, Philippines. The figures are based on a 30-year period (1990–2020) to provide a reliable average. Now, let's explore all the details to give you a full picture.

San Fernando, La Union has a relatively rainy climate with high precipitation levels, averaging 2464 mm (97 in) of rainfall annually. Despite the high annual total, it does experience a distinct rainy season during certain months. Examine our detailed charts below to understand these seasonal patterns.

Monthly Precipitation Levels

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

San Fernando, La Union can be quite wet during July, receiving approximately 377 mm (15 in) of precipitation over 22 rainy days.

In contrast February, experiences much drier conditions, with 50 mm (2 in) of rainfall, spread across a single rainy day.

July, the wettest month, has a maximum daytime temperature of 30°C (86°F). During the driest month February you can expect a temperature of 29°C (84°F). For more detailed insights into the city's temperatures, visit our San Fernando, La Union Temperature page.

San Fernando, La Union's average annual precipitation is 2464 mm (97 in). Let's compare this to some popular worldwide tourist destinations:

Seville, Spain, experiences 541 mm (21 in) of rainfall annually, with wet winters and dry summers typical of southern Spain.

Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm (39 in) of annual rainfall, mostly in the summer.

Melbourne, Australia, has 690 mm (27 in) of rainfall annually, spread fairly evenly throughout the year.

Singapore, situated near the equator, gets 2581 mm (102 in) of rainfall annually, with no distinct dry season and consistent monthly precipitation.

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.

Climate change is affecting precipitation patterns worldwide, including San Fernando, La Union:

• Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
• Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.

• 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 San Fernando, La Union's weather, including sunshine hours, humidity levels, and temperature data, visit our San Fernando, La Union Climate page.