Philippine's Severe Heatwave Shows Slight Relief

Since mid-April, most regions in the Philippines have experienced persistent hot and high-temperature weather, with the number of days recording a daily maximum temperature exceeding 35°C ranging from 28 to 36 days, accompanied by relative humidity levels of 80-90%.

It is forecasted that over the next week, the subtropical high pressure will weaken. Most regions of Luzon in the Philippines will experience predominantly sunny and hot weather with thunderstorms. In some localized areas, the maximum temperature will still reach 35-37°C, though the extent of extreme heat will be reduced compared to the previous period. In Manila and its southern regions, the frequency of thunderstorms will increase, with maximum temperatures around 32°C, offering some relief from the heat (Figures 1-2).

Figure 1: 500 hPa Geopotential Height (Contour Lines) and 850 hPa Wind Field (Wind Barbs) at 1200 UTC, May 22, 2025

Figure 2: Forecast of Daily Maximum Temperatures (≥35°C) from 20:00 on May 21 to 20:00 on May 26, 2025

Author: Cao Yuenan                                 Reviewer: Guan Yue 

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