Climate of the Philippines

Also known as: Tropical maritime climate of the Philippines (PAGASA's descriptive phrase) · Philippine tropical climate · The Amihan–Habagat regime (shorthand for the two-monsoon year) · Tag-ulan and tag-init seasons (vernacular season names)

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Definition

The climate of the Philippines is the tropical, maritime climate of the Philippine archipelago — in PAGASA’s official characterization, one of “relatively high temperature, high humidity and abundant rainfall,” classified under the Köppen system into tropical rainforest (Af), tropical monsoon (Am), and tropical savanna (Aw) types, plus humid subtropical and oceanic types in higher-altitude areas. The mean annual temperature is 26.6 °C excluding the 1,500-meter highland city of Baguio, which averages 18.3 °C; January is the coolest month (25.5 °C) and May the warmest (28.3 °C), while annual rainfall ranges from roughly 965 to 4,064 millimeters across the islands. (PAGASA — Climate of the Philippines, Wikipedia — Climate of the Philippines)

PAGASA officially divides the year into two seasons by rainfall and temperature — a rainy season from June to November and a dry season from December to May, the latter split into a cool dry season (December–February) and a hot dry season (March–May) — which popular usage renders as three: tag-init or tag-araw (hot dry), tag-ulan (rainy), and taglamig (cool dry). The rhythm is driven by the two monsoons, the southwest Habagat (May–October, copious rain) and the northeast Amihan (November–February, cool and relatively dry), and punctuated by about 20 tropical cyclones entering the Philippine Area of Responsibility yearly, eight or nine crossing the country, with the season peaking July–October. The El Niño–Southern Oscillation tilts the system: El Niño raises the odds of below-normal rainfall, dry spells, and drought, while La Niña brings above-normal rain and flood risk. (PAGASA — Climate of the Philippines, Wiktionary — tag-init, Wiktionary — tag-ulan, PAGASA — Tropical Cyclone Information, PAGASA — La Niña Watch)

Identities

Source Type	Identity
Wikipedia	Climate of the Philippines
Wikidata	climate of the Philippines (Q2485045)
DBpedia	Climate of the Philippines
ProductOntology	N/A
Wiktionary	N/A
Library of Congress Subject Headings (LCSH)	Philippines—Climate
MeSH	Climate
NCBI Taxonomy	N/A
AGROVOC	Climate
Google Scholar	Philippines tropical climate monsoon Amihan Habagat El Nino rainfall PAGASA
ConceptNet	N/A
OpenCyc	N/A

Also Known As

Tropical maritime climate of the Philippines (PAGASA’s descriptive phrase)
Philippine tropical climate
The Amihan–Habagat regime (shorthand for the two-monsoon year)
Tag-ulan and tag-init seasons (vernacular season names)

Examples and Analogies

One country, several rainfall regimes: PAGASA’s four climate types, based on rainfall distribution, give Manila two pronounced seasons (Type I), Borongan in Eastern Samar no dry season with a November–January maximum (Type II), Cebu no pronounced seasons with a relatively dry November–April (Type III), and General Santos rain spread evenly through the year (Type IV) — a reminder that “the Philippine climate” is a family of local regimes. (PAGASA — Climate of the Philippines, Wikipedia — Climate of the Philippines)
Two winds that own the year: the monsoons behave like a see-saw — the Habagat’s moist southwest flow ascends and rains from May to October, then gives way around late September to mid-October to the Amihan, whose descending northeast flow brings the cool, drier months — a wind calendar older than any instrument record. (Wikipedia — Climate of the Philippines)
Baguio, the exception that proves altitude: at 1,500 meters the “summer capital” averages 18.3 °C, about 8 degrees below the lowland mean, and once received 2,239 mm of rain in four July days (1911) — latitude barely matters in this climate, elevation does. (PAGASA — Climate of the Philippines, Wikipedia — Climate of the Philippines)
ENSO as a dimmer switch: El Niño dims the rainfall — PAGASA’s advisories warn of below-normal rain, dry spells, and drought — while La Niña turns it up toward above-normal rainfall, floods, and landslides; the Philippines sits squarely in the oscillation’s path. (PAGASA — El Niño Advisory, PAGASA — La Niña Watch)
Verified data (norms and extremes):
Temperature: mean 26.6 °C (excluding Baguio at 18.3 °C); January 25.5 °C, May 28.3 °C (PAGASA — Climate of the Philippines)
Rainfall: 965–4,064 mm annually; Manila about 2,047 mm, Borongan about 4,109 mm; wettest areas Baguio, eastern Samar, eastern Surigao (PAGASA — Climate of the Philippines, Wikipedia — Climate of the Philippines)
Humidity: monthly averages from 71 percent (March) to 85 percent (September) (PAGASA — Climate of the Philippines)
Cyclones: about 20 enter the PAR yearly, 8–9 crossing the country; the July–October peak sees nearly 70 percent of typhoon development (PAGASA — Tropical Cyclone Information)

Usage Scenarios

1. Seasonal Forecasting and Public Advisories

PAGASA operationalizes the climate by declaring seasonal onsets and issuing ENSO advisories: it announced the 2025 rainy season start on June 3, and it runs an El Niño/La Niña alert system — currently tracking a moderate-to-strong El Niño expected to persist into the first half of 2027 — used to time planting, storage, and preparedness. (Wikipedia — Climate of the Philippines, PAGASA — El Niño/La Niña Monitoring)

2. Agriculture and Water Resource Planning

Planting calendars, irrigation scheduling, and reservoir management across the four climate types are built on the rainfall regimes; in El Niño years the allocations shrink — the crises of 1997–98, 2015–16, and 2019 documented in this site’s dry season water scarcity entry are the standing case studies. (PAGASA — El Niño Advisory, PAGASA — Climate of the Philippines)

3. Disaster Preparedness and Risk Reduction

The typhoon calendar drives the preparedness cycle: local governments stage evacuation, pre-positioning, and flood control work around the July–October peak, while Habagat-enhanced rainfall events — often caused by cyclones passing north of the country — require separate monitoring from landfalling storms themselves, as this site’s typhoon and natural disasters entries document. (PAGASA — Tropical Cyclone Information)

4. Engineering, Architecture, and Land-Use Design

Designers use intensity-duration-frequency rainfall statistics, the climate-type map, and wind-zone data to size drainage, set roof loads, and site infrastructure — the practical consumption of the climatological normals PAGASA maintains. (PAGASA — Climate of the Philippines)

Strategies

Plan by climate type, not by national average: the Corona-based Type I–IV map tells a Cebu planner and a Borongan planner different stories about when water will and will not arrive. (PAGASA — Climate of the Philippines)
Manage the monsoon transition: infrastructure and agriculture should be timed to the Amihan–Habagat handover — the late-September-to-October window when rains ease — rather than fixed calendar dates that a shifting climate renders unreliable. (Wikipedia — Climate of the Philippines)
Institutionalize ENSO response: treat PAGASA’s El Niño and La Niña alerts as action triggers for water allocation, crop substitution, and flood pre-positioning, the logic embedded in the inter-agency drought response this site’s water scarcity entry records. (PAGASA — El Niño Advisory, PAGASA — La Niña Watch)
Exploit the cyclone asymmetry: northern Luzon and the eastern Visayas absorb most landfalls while Mindanao is largely spared — a fact PAGASA credits for Mindanao’s agricultural advantage. (Wikipedia — Climate of the Philippines)
Protect the watersheds that make rainfall usable: with 965–4,064 mm falling unevenly across the islands, forest cover and storage determine whether the water reaches users. (PAGASA — Climate of the Philippines)

Security and Safety Measures

Prepare water security for El Niño dry seasons: below-normal rainfall raises dry-spell and drought risk — conserve storage, ration early, and protect allocations for drinking water first, the failure modes of 1997–98, 2015–16, and 2019 documented in this site’s dry season water scarcity entry. (PAGASA — El Niño Advisory)
Flood-proof for La Niña and Habagat years: above-normal rainfall brings floods, flash floods, and rain-induced landslides; drainage clearing and slope monitoring belong in the seasonal checklist. (PAGASA — La Niña Watch)
Run the typhoon calendar: complete preparedness drills and repairs before July, when the peak that generates nearly 70 percent of typhoons begins. (PAGASA — Tropical Cyclone Information)
Manage heat in March–May: the hot dry season combines the year’s highest temperatures with the lowest humidity and greatest discomfort in PAGASA’s records — schedule outdoor labor and hydration accordingly. (PAGASA — Climate of the Philippines)
Respect local cyclone exposure: heed wind signals and evacuation even for “weak” systems, since flooding, not only wind, is the climate’s chronic killer, as this site’s typhoon entry documents. (PAGASA — Tropical Cyclone Information)

Historical Context

The scientific description of the climate is among the country’s oldest institutions: the rainfall-based classification of Philippine climates was established by the Jesuit meteorologist José Coronas in 1920 and has been maintained and modified by PAGASA ever since as the official four-type scheme, while the observational lineage runs from the Observatorio Meteorológico de Manila of 1865 — which issued the first typhoon warning on July 7, 1879 — to the modern agency documented in this site’s PAGASA entry. Early records fixed extremes still cited, above all the July 1911 Baguio cyclone that delivered 2,239 mm of rain in four days, followed by drought. (Wikipedia — Climate of the Philippines, PAGASA — Climate of the Philippines)

The modern era has added two layers to that inheritance. Köppen-based mapping now places the islands within the world tropical belt as Af, Am, and Aw territory, quantified in 1991–2020 normals; and ENSO monitoring became a standing public service, with PAGASA’s alert system currently tracking a moderate-to-strong El Niño that climate models expect to persist into the first half of 2027. Seasonal onsets are themselves watched as news — the 2025 rainy season was declared started on June 3 — and the variability of those onsets, together with warming trends and sea-level rise, has moved the climate from background condition to active policy subject. (Wikipedia — Climate of the Philippines, PAGASA — El Niño/La Niña Monitoring)

Challenges and Controversies

ENSO-Driven Water Crises

The documented El Niño impacts — below-normal rainfall, dry spells, drought — turned into national emergencies in 1997–98, 2015–16, and 2019, when Metro Manila households lost service and irrigation was cut, a record examined in this site’s dry season water scarcity entry and an ongoing dispute over storage investment versus rationing. (PAGASA — El Niño Advisory)

Climate Change and the Typhoon Question

After Haiyan, scientists and policymakers debated how much of the basin’s behavior to attribute to warming — the same debate reflected in this site’s typhoon and natural disasters entries — with rising sea levels and rainfall intensity the least contested elements and attribution of individual storms the most. (Wikipedia — Climate of the Philippines)

A Shifting Seasonal Calendar

Onset dates that drift — such as the June 3, 2025 declaration of the rainy season — put pressure on planting calendars, school schedules, and water management built on fixed dates, and PAGASA’s move to event-based declarations rather than calendar months is itself part of the adaptation debate. (Wikipedia — Climate of the Philippines)

The Age of the Four-Type Classification

The Corona scheme of 1920 remains the official planning map even as researchers publish finer-resolution rainfall analyses; agencies and scientists continue to weigh whether a century-old four-type framework still describes a changing climate adequately. (PAGASA — Climate of the Philippines)