December weather forecast and climate
Connecticut, USA

December is the beginning of the icy winter in Connecticut, with the average temperatures in the 20°F (-6.7°C) to 44°F (6.7°C) range. Cold fronts occasionally push the temperatures below 0°F (-17.8°C) as gray skies rule the roost. Nights vary by 5°F (-15°C) or more between the interior and the coastal regions. Groton on the coast registers between 28°F (-2.2°C) to 44°F (6.7°C), while West Thompson Lake in the interior is between 20°F (-6.7°C) to 34°F (1.1°C).
Ten to fifteen days yield 3" (76mm) to 5" (127mm) of rain, but the 6" (152mm) to 8" (203mm) of snowfall makes the roads slippery and the month unfavorable for visitors. The snowfall varies by region and registers as high as 16" (406mm) in Norfolk. The ocean water is cold and uninviting in the winter.
Cross country skiing has its enthusiasts, as the accumulation of snow offers fantastic opportunities for snowmobiling and tubing. Christmas is predominantly white in the interior, even though the sunshine lasts for a daily 4 hours. December is a time for bulky jackets and caps in Connecticut.