December in Bellingham averages a daily high of 7.4°C with nights around 1.4°C. Expect roughly 20.7 wet days totalling 121.5mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Bellingham is July–August.
Based on BELLINGHAM 3 SSW, WA US (5.1km), 1995–2024. 28 years of December data.