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San Fernando, La Union Weather in September
In San Fernando, La Union, September brings very high daytime temperatures around 30°C (86°F), with nights cooling to 26°C (79°F). This month falls within the rainy season, so expect frequent rainfall.
Rainfall in San Fernando, La Union in September
As part of the rainy season, San Fernando, La Union sees around 19 days of rain in September, with an average of 357 mm (14 in). The rain this month falls heavily when it arrives. Late afternoons in particular can see strong showers, so waterproofs are worth keeping handy.
Temperature in San Fernando, La Union in September
San Fernando, La Union in September gets highs of 30°C (86°F) during the day and drops to 26°C (79°F) at night. Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. With lows around 26°C (79°F), the nights are warm enough that a sheet is usually all you need for bedding.September in San Fernando, La Union has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
San Fernando, La Union Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
30°C (86°F)
Chance of Rain
64%
Precipitation
357 mm (14 in)
Rainy days
19 days
San Fernando, La Union Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in San Fernando, La Union - and find the best time to visit.
Historical weather records for San Fernando, La Union in September
Browse day-by-day weather records for San Fernando, La Union spanning 21 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San Fernando, La Union historical weather extremes in September
Based on 20 years of weather observations in San Fernando, La Union between 2006 and 2026, these are the recorded extremes.
- The warmest day in September was on September 1, 2026, with a maximum of 32°C (90°F).
- The coldest September day was on September 25, 2025, with a maximum of 26°C (79°F).
- The coldest night in September in San Fernando, La Union was on September 2, 2012, with a minimum of 24°C (75°F).
- The wettest day in September San Fernando, La Union was on September 14, 2024 with 92 mm (3.6 in) of precipitation.
Best Places in Philippines in September
Find out more about the weather in Philippines and which places have the best travel conditions in this month. See all of Philippines in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in San Fernando, La Union in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can.
What To Do in San Fernando, La Union in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
San Fernando, La Union 3-Day Forecast
More climate data for San Fernando, La Union
See the full San Fernando, La Union climate overview or explore weather in Philippines.
Popular in September
Where to go in September - average daytime high across popular destinations.
Angeles City
31°C (88°F) Manila32°C (90°F) Cebu City31°C (88°F) Mactan30°C (86°F) Puerto Princesa30°C (86°F) Davao City31°C (88°F) Boracay29°C (84°F) Panglao City
30°C (86°F) Bucket list
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