September in Delta averages a daily high of 18.7°C with nights around 12°C. Expect roughly 8.3 wet days totalling 51.3mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Delta is June–August.
Based on DELTA TSAWWASSEN BEACH, BC CA (8.7km), 1995–2024. 25 years of September data.