January in Bislig averages a daily high of 29.6°C with nights around 22.8°C. Expect roughly 25.4 wet days totalling 765.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Bislig is November–April.
Based on HINATUAN, RP (17km), 1995–2024. 20 years of January data.