May in San Fernando averages a daily high of 24.8°C with nights around 16.5°C. Expect roughly 19 wet days totalling 380.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit San Fernando is January–March.
Based on BAGUIO, RP (42km), 1995–2024. 18 years of May data.