Vancouver vs Seattle

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Seattle edges ahead as the better destination in December. Seattle offers 4 hours of daily sunshine with only 18 rain days, while Vancouver sees 4 sunshine hours and 19 rain days.

Vancouver is on the cooler side at 6°C, requiring warmer clothing. Seattle is cooler at 7°C.

For travelers who prioritize dry weather, Seattle is the stronger choice in December.

Vancouver reaches an average high of 6°C (43°F) and drops to 2°C (36°F) at night during December. The daily temperature range is 4°C, meaning relatively stable temperatures from day to night.

Seattle averages 7°C (45°F) for the high and 2°C (36°F) for the low, with a daily range of 5°C. The two cities feel quite similar in terms of temperature.

Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in December.

Vancouver receives approximately 298 mm of rainfall across 19 rain days during December. Rain is frequent, so waterproof gear is essential.

Seattle sees 176 mm over 18 rain days. That makes Seattle the drier option by 1 rain day and 122 mm of total precipitation.

Both cities share similar humidity levels at 65%.