May in Barking averages a daily high of 18.7°C with nights around 9.2°C. Expect roughly 10.8 wet days totalling 45.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Barking is May–September.
Based on HEATHROW, UK (26km), 1995–2024. 30 years of May data.