Vancouver vs Seattle

Vancouver and Seattle are closely matched in August. Neither city has a clear advantage across all metrics. Your decision should come down to personal preference, cultural interests, and travel logistics rather than weather alone.

Vancouver sits in the comfortable travel range at 23°C. Seattle is also comfortable at 26°C.

For travelers who prioritize dry weather, Seattle is the stronger choice in August. Vancouver receives 6 more hours of sunshine per day, which matters for sightseeing and outdoor activities.

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 26°C (79°F) for the high and 17°C (63°F) for the low, with a daily range of 9°C. The 3°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 27 mm over 2 rain days. That makes Seattle the drier option by 5 rain days and 45 mm of total precipitation.

Both cities share similar humidity levels at 65%.