December in Ilagan averages a daily high of 28.2°C with nights around 19.7°C. Expect roughly 14.6 wet days totalling 187.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Ilagan is January–March.
Based on TUGUEGARAO, RP (57km), 1995–2024. 16 years of December data.