Vancouver vs Seattle

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Seattle edges ahead as the better destination in August. Seattle offers 12 hours of daily sunshine with only 5 rain days, while Vancouver sees 12 sunshine hours and 7 rain days.

Vancouver sits in the comfortable travel range at 23°C. Seattle is also comfortable at 25°C.

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

Vancouver reaches an average high of 23°C (73°F) and drops to 15°C (59°F) at night during August. The daily temperature range is 8°C, meaning moderate variation throughout the day.

Seattle averages 25°C (77°F) for the high and 14°C (57°F) for the low, with a daily range of 11°C. The 2°C difference is noticeable but not dramatic.

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

Vancouver receives approximately 72 mm of rainfall across 7 rain days during August. Rain is occasional, so a light rain jacket should suffice.

Seattle sees 34 mm over 5 rain days. That makes Seattle the drier option by 2 rain days and 38 mm of total precipitation.

Both cities share similar humidity levels at 65%.