May in Tacoma averages a daily high of 19.1°C with nights around 9.6°C. Expect roughly 10.5 wet days totalling 48mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Tacoma is July–September.
Based on TACOMA NUMBER 1, WA US (2.5km), 1995–2024. 27 years of May data.