San Fernando, La Union Temperature by Month

San Fernando, La Union in Luzon, Philippines enjoys a stable climate, with daytime temperatures staying close to 30°C (86°F) throughout the year. Explore the full monthly breakdown below.

The climate in San Fernando, La Union remains fairly constant, offering very warm temperatures throughout the year. Maximum daytime temperatures reach a very warm 31°C (88°F) in May, dropping to a comfortable 29°C (84°F) in January. Nighttime lows stay between 27°C (81°F) and 26°C (79°F).

The chart below illustrates the average maximum day and minimum night temperatures in San Fernando, La Union by month:

Low temperatures are most often recorded between 4 AM and 6 AM, while highs typically occur around 3 PM.

The chart below shows the average temperature throughout the year:

San Fernando, La Union's average annual maximum temperature is 30°C (86°F). To put that in context, here's how it compares to a few well-known destinations:

Lisbon, Portugal averages 21°C (70°F) annually, warm summers, mild winters, and rain mainly in the cooler months.

Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.

San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation, summers are often cool and foggy, winters mild.

Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in San Fernando, La Union this rarely lasts long on the ground.

For more on San Fernando, La Union's weather, including monthly rainfall, sunshine hours, and humidity, visit our San Fernando, La Union climate page.