According to Keep umbrellas handy: Pagasa officially declares rainy season | Inquirer News, the start of the country's rainy season was confirmed by the state weather agency on Friday.
According to the Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa), its beginning was signaled by the passage of Super Typhoon "Betty" and the prevailing southwest monsoon, or habagat
According to Pagasa officer-in-charge Esperanza Cayanan, the occurrence of sporadic thunderstorms, the passage of Super Typhoon (STY) "Betty," and the Southwest Monsoon (Habagat) over the past few days have brought widespread rains over the western portions of Luzon and Visayas, signaling the beginning of the rainy season in the country, especially over the Climate Type I areas.
El Niño is anticipated to reduce rainfall, but habagat will make up for it, according to Cayanan.
El Niño raises the possibility of below-average rainfall circumstances, which might have unfavorable effects (such as dry spells and droughts) in various regions of the nation. However, an intensified Southwest monsoon season (Habagat) may also be anticipated, which might lead to circumstances with above-average rainfall across the country's western region, the meteorologist added.
A shift from ENSO-neutral to El Niño is anticipated in the coming months, with a larger likelihood that El Niño will continue through the first quarter of 2024.