August in Moncton averages a daily high of 24.7°C with nights around 13.5°C. Expect roughly 13.5 wet days totalling 79.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Moncton is June–September.
Based on BUCTOUCHE CDA CS, NB CA (37.7km), 1995–2024. 25 years of August data.