May in Lower Hutt averages a daily high of 15.6°C. Expect roughly 13.6 wet days totalling 90.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Lower Hutt is December–March.
Based on WELLINGTON AERO AWS, NZ (16.2km), 1995–2024. 19 years of May data.