December in Zamboanga averages a daily high of 33°C with nights around 23.5°C. Expect roughly 10.2 wet days totalling 90.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Zamboanga is January–April.
Based on ZAMBOANGA, RP (1.4km), 1995–2024. 21 years of December data.