In May 2025, above-normal rainfall was observed across much of Myanmar, Thailand, and parts of Cambodia and Vietnam. Wetter-than-normal conditions were also noted in southern Sumatra, southern Malaysia, eastern Indonesia (including parts of Papua), and portions of the Philippines.

On the other hand, below-normal rainfall occurred in areas of northern Cambodia, Brunei Darussalam, central Indonesia (including Kalimantan and Sulawesi), and around Singapore.

The maps on the right (top to bottom) indicate the observed rainfall for May 2025, along with the climatological normal from 1991 to 2020, providing context for the anomaly map on the left.