September in Lower Hutt averages a daily high of 14.6°C. Expect roughly 12.9 wet days totalling 79.6mm. 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. 17 years of September data.