MANILA, Philippines — Most parts of the archipelago will experience generally fair weather as the northeast monsoon, locally known as amihan, continues to weaken, the state-run weather agency said on Thursday. Weather specialist Veronica Torres of the Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa) said in a 5 a.m. briefing that no weather disturbance has been monitored inside or outside the Philippine Area of Responsibility in the coming days. Torres said the cool, dry winds brought by the amihan will continue to affect Batanes, Cagayan, Isabela, Apayao, and Aurora, where cloudy skies with light rains may occur. The same weather system will also prevail over Manila and the rest of Luzon, where partly cloudy to overcast skies with isolated light rains are likely, the national weather bureau added. The rest of the country, meanwhile, may experience partly cloudy to cloudy skies with isolated rain showers or thunderstorms due to localized thunderstorms. Pagasa said it may soon declare the onset of the dry season—commonly referred to as “summer” in the Philippines—following the continued weakening of the northeast monsoon. As for the heat index outlook, Cotabato City in Maguindanao is expected to record the highest heat index of the day at 40 degrees Celsius, which falls under the “extreme caution” category. In Metro Manila, the heat index is expected to range from 30°C to 31°C, the weather agency said.