June in Fredericton averages a daily high of 22.2°C with nights around 10.6°C. Expect roughly 13 wet days totalling 98.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Fredericton is June–September.
Based on FREDERICTON CDA CS, NB CA (4.9km), 1995–2024. 24 years of June data.