December in Danbury averages a daily high of 5°C with nights around -3.5°C. Expect roughly 12.2 wet days totalling 118.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Danbury is May–June.
Based on DANBURY, CT US (2.8km), 1995–2024. 26 years of December data.