Some parts of Mindanao may experience scattered rains on Friday due to the intertropical convergence zone (ITCZ), or the converging of trade winds from the northern and southern hemispheres.
The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) said the ITCZ was already affecting Southern Mindanao on Thursday.
It appears as a band of clouds consisting of showers with occasional thunderstorms that encircles the globe near the equator.
Cloudy skies with scattered light to moderate rain showers that may become heavy in the event of severe thunderstorms are likely in Agusan del Norte, Agusan del Sur, Dinagat Islands, Surigao del Norte, Surigao del Sur, Davao de Oro, Davao del Norte, Davao del Sur, Davao Oriental, Davao Occidental, South Cotabato, Cotabato, Sultan Kudarat, and Sarangani this Friday.
Meanwhile, Metro Manila and the rest of the country will continue to experience hot and humid weather due to the warm easterlies until the weekend.
The hot weather in the morning, however, may spark thunderstorms later in the day.
PAGASA reminded the public that severe or intense thunderstorms that most often occur in the afternoon or evening may trigger flash floods or landslides in high-risk areas.
Weather specialist Ezra Bulquerin said there is a slim chance that a low pressure area or tropical cyclone may affect the country in the next three to five days.
Based on the PAGASA's historical data from 1948 to 2016, an average of two to four tropical cyclones enter or form in the Philippine area of responsibility in July.