May in Mackay averages a daily high of 25.5°C with nights around 16°C. Expect roughly 8.9 wet days totalling 72.9mm. 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 May data.