December in Hamden averages a daily high of 5.9°C with nights around -3.8°C. Expect roughly 9.9 wet days totalling 109.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Hamden is May–June.
Based on MOUNT CARMEL, CT US (1.4km), 1995–2024. 26 years of December data.