May in Guildford averages a daily high of 18.9°C with nights around 8°C. Expect roughly 11.9 wet days totalling 88.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Guildford is June–September.
Based on PITT MEADOWS CS, BC CA (8.5km), 1995–2024. 29 years of May data.