December in Binjai averages a daily high of 30.7°C with nights around 23.1°C. Expect roughly 8.8 wet days totalling 74.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Binjai is December–July.
Based on POLONIA, ID (21.2km), 1995–2024. 16 years of December data.