December in Medan 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 Medan is December–July.
Based on POLONIA, ID (2.9km), 1995–2024. 16 years of December data.