THE northeast monsoon or "amihan" which brings cooler temperatures is about to end and will be replaced by the warm and dry season, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa) said on Monday.

Weather specialist Benison Estareja said the northeast monsoon is affecting areas in extreme Northern Luzon but it may still bring cold nights and mornings in Southern Luzon until it ends.

"The cold effects of amihan could still prevail in these areas but it could be the last as it is expected to end as the warm-dry season approaches," the Estareja said.

In its 5 a.m. advisory, the weather agency said the easterlies – winds coming from the east that pass through the Pacific Ocean and carry humid and warm weather – are affecting the entire archipelago.

Metro Manila and the rest of the country will have partly cloudy to overcast skies with scattered rain showers or thunderstorms due to the combined effects of the easterlies and localized thunderstorms.