May in Beaverton averages a daily high of 19.9°C with nights around 9.6°C. Expect roughly 11.8 wet days totalling 64.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Beaverton is July–September.
Based on PORTLAND KGW TV, OR US (9.6km), 1995–2024. 29 years of May data.