December in Nanaimo averages a daily high of 7.1°C with nights around 3.7°C. Expect roughly 20.5 wet days totalling 159.4mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Nanaimo is July–August.
Based on ENTRANCE ISLAND, BC CA (10.6km), 1995–2024. 26 years of December data.