December in Fredericton averages a daily high of 0.1°C with nights around -8.1°C. Expect roughly 14.7 wet days totalling 106.1mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Fredericton is June–September.
Based on FREDERICTON CDA CS, NB CA (4.9km), 1995–2024. 23 years of December data.