May in Oas averages a daily high of 32.5°C with nights around 25.1°C. Expect roughly 14.4 wet days totalling 185.5mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Oas is November–March.
Based on LEGASPI, RP (29.2km), 1995–2024. 27 years of May data.