La Union (San Juan La Union) weather in January

January in La Union: hot, rainy, with clean air — an excellent time to visit.

Updated September 2026 · climate normals from ERA5 reanalysis

La Union🇵🇭 Philippines · Philippines · Beach85
  1. 85Jan
  2. 89Feb
  3. 93Mar
  4. 90Apr
  5. 75May
  6. 63Jun
  7. 57Jul
  8. 55Aug
  9. 60Sep
  10. 66Oct
  11. 78Nov
  12. 81Dec

#4 of 12 months in La Union · #333 of 1413 destinations to visit in January · comfort 85/100 (tier A)

Days
27°C
Nights
24°C
Wet days
13
Sun
9.8 h
Humidity
83%
Daylight
11 h
La Union, Philippines
Photo: Luzviminda7641 · CC0

Traveller notes on La Union in January

Other months in La Union

Forum posters describe September as one of the wettest months across the Philippines, second only to October on average, with typhoon season adding real variability - a typhoon can bring rain for days, while an ordinary rainy stretch typically means a sharp, short downpour rather than an all-day event. Posters describe a typical 10-day window as mixing a few bright, sunny days with a few genuinely torrential ones, and note forecasts only become reliable a few days out given how quickly conditions shift. Posters describing La Union specifically highlight it as a well-established surf destination with newer resort development, implying the wave conditions tied to this wetter, windier season can actually work in a surfer's favor. Posters generally rate September as genuinely wet and typhoon-prone but still very visitable for La Union with flexible plans, particularly appealing for surf-focused travelers.
Tripadvisor community · September · 1 month ago · Read more on Tripadvisor ↗
Forum posters describe the La Union/Baler surf season as running roughly October through March, placing March near the tail end of the best window rather than deep in the off-season - posters call the weather generally fine for a March trip, though peak conditions (November-February) are technically just behind. La Union is repeatedly named as the Philippines' second-most-popular surf destination, drawing a crowd that skews heavily toward surfers rather than general beachgoers, with decent snorkeling spots nearby as a secondary activity. Wave conditions this time of year are described as generally beginner-friendly, a pattern posters say tends to hold from the December low-season stretch through into early spring.
Tripadvisor community · March · 1 month ago · Read more on Tripadvisor ↗

Add your own note from La Union's card on the map.

La Union climate normals — January

Daytime high27°C / 81°F🥵 hot
Nighttime low24°C / 74°F
Feels like (high)32°C / 90°F
Sea temperature28°C / 83°F♨️ bath-warm
Rainfall87 mm / 3.4 in🌧 rainy
Rainy days13 days
Humidity83%💦 very humid
Dew point22°C / 72°F
Sunshine9.8 h/day
Daylight11.3 h
Wind14 km/h / 9 mph
Air quality (US AQI)31🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in La Union in January

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

Peak crowdsAmihan surf season, Christmas and New Year season, Year-end break in Philippines(estimated)

JFMAMJJASOND

Peak crowdsBusyShoulder seasonQuiet

Best months for La Union's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Fair weatherLa Union's weather peaks February–April, best around March.

JFMAMJJASOND

Best weatherFair weatherToughest weather

What's on in La Union in January

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Season

    Amihan surf season

    1 Nov – 31 Mar · usuallyCrowded

    The northeast swell that made San Juan the surf town of northern Luzon — cleaner, more consistent lines than the summer season, and cold enough at dawn for a top. Source ↗

  • Holiday

    Christmas and New Year season

    16 Dec – 1 JanChristmas & New YearCrowdedBook early

    The peak of the country's long Christmas season: dawn Simbang Gabi masses run 16 to 24 December, lanterns hang everywhere, and domestic travel surges towards New Year, so book flights and ferries early. Source ↗

What's on around the world in January →

Nearby, and something's on

Within 300 km of La Union — a day trip or a short hop — with something on this month. Never part of the comfort score.

Where is La Union?

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La Union in January — FAQ

Is January a good time to visit La Union?
January in La Union: hot, rainy, with clean air — an excellent time to visit. It ranks #4 of 12 months for La Union on SeasonMap's comfort score (85/100).
What is the weather like in La Union in January?
In January, La Union averages a daily high of 27.1°C and a low of 23.5°C, with about 87.2 mm of rain over roughly 13.3 rainy days.
What is the air quality in La Union in January?
La Union has a mean US Air Quality Index of about 31 in January.

Within 300 km: Manila's Feast of the Black Nazarene on 9 Jan.