September in Mackay averages a daily high of 26.6°C with nights around 15.1°C. Expect roughly 3.5 wet days totalling 24.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Mackay is June–September.
Based on MACKAY AERO, AS (2.4km), 1995–2024. 28 years of September data.