December weather forecast
Connecticut, USA

December in Connecticut signifies the full onset of the winter season, bringing colder temperatures, increased cloud cover, and the potential for substantial snowfall. The landscape transforms, with bare trees and often snow-covered grounds replacing the colorful foliage of autumn.

Average high temperatures continue their decline, ranging from 30°F (-1.1°C) to 40°F (4.4°C) (−34°F (1.1°C) to 39.9°F (4.4°C)). Coastal regions may experience slightly milder conditions, but overall, the temperatures become markedly cooler, particularly during the night.

Snowfall becomes a significant weather feature, particularly in northern and inland areas. Accumulations vary but can be substantial, especially in hilly regions. Coastal areas receive less snow on average but are not immune to winter storms.

Rainfall remains consistent with the yearly average of 44" (1118mm) to 48" (1219mm), but precipitation is more likely to fall as snow or sleet, depending on the temperatures. Winter storms can bring a mix of rain, snow, and ice, making for challenging travel conditions.

Humidity is generally low during December, contributing to the crisp winter air. However, the presence of snow and ice can add moisture to the atmosphere, particularly during and after winter storms.

Sunshine is less abundant in December, with shorter days and increased cloud cover often associated with the winter season. The sunniest period between June and August is a distant memory, and December's weather tends to be more subdued and grey.

December's weather in Connecticut is characterized by a winter chill, potential for snow, and reduced sunshine. The state's diverse geography, from the northern hardwood and conifer forests to the coastal marshes and beaches, influences the local weather patterns, creating variations in temperature and snowfall. The transition from November's cooler conditions to December's full embrace of winter is marked, setting the stage for the coldest months of the year. The contrast between the mild and colorful autumn and the cold and often stark winter landscape becomes fully apparent as Connecticut settles into the winter season.

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• Hartford - December »
  With an average of 9h and 12min of daylight, December has the shortest days of the year in Hartford, Connecticut. In Hartford, during December, snow falls for 3.5 days and regularly aggregates up to 0.79" (20mm) of snow.
• New Haven - December »
  The month with the most rainfall in New Haven is December, when the rain falls for 12.5 days and typically aggregates up to 3.86" (98mm) of precipitation. In New Haven during December, snow falls for 3.5 days and regularly aggregates up to 1.34" (34mm) of snow.
• Stamford - December »
  In Stamford, in December, during 3.9 snowfall days, 1.65" (42mm) of snow is typically accumulated. February, May, June and December, with an average relative humidity of 75%, are most humid months in Stamford, Connecticut.
• Bridgeport - December »
  In Bridgeport during December, snow falls for 4.3 days and regularly aggregates up to 1.81" (46mm) of snow. January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Bridgeport, Connecticut.
• Waterbury - December »
  The month with the most rainfall in Waterbury is December, when the rain falls for 10.5 days and typically aggregates up to 3.78" (96mm) of precipitation. In Waterbury in December, during 6.2 snowfall days, 2.87" (73mm) of snow is typically accumulated.
• Norwalk - December »
  In Norwalk, in December, during 3.6 snowfall days, 1.77" (45mm) of snow is typically accumulated. December has the shortest days of the year in Norwalk, Connecticut, with an average of 9h and 18min of daylight.
• Danbury - December »
  In Danbury, Connecticut, during December, the rain falls for 8.1 days and regularly aggregates up to 1.02" (26mm) of precipitation. In Danbury, in December, during 8.1 rainfall days, 1.02" (26mm) of precipitation is typically accumulated.
• New Britain - December »
  The month with the most rainfall in New Britain is December, when the rain falls for 12.1 days and typically aggregates up to 3.54" (90mm) of precipitation. In New Britain in December, during 5.5 snowfall days, 3.23" (82mm) of snow is typically accumulated.
• Bristol - December »
  The month with the most rainfall in Bristol is December, when the rain falls for 11.7 days and typically aggregates up to 3.74" (95mm) of precipitation. In Bristol in December, snow falls for 6.4 days, with typically accumulated 3.23" (82mm) of snow.
• Meriden - December »
  In Meriden during December, the rain falls for 11.5 days and regularly aggregates up to 3.82" (97mm) of precipitation. In Meriden in December, during 5.4 snowfall days, 2.28" (58mm) of snow is typically accumulated.
• Milford - December »
  In Milford in December, during 3.7 snowfall days, 1.65" (42mm) of snow is typically accumulated. In Milford, in December, snow falls for 3.7 days, with typically accumulated 1.65" (42mm) of snow.
• West Haven - December »
  The month with the most rainfall in West Haven is December, when the rain falls for 12.5 days and typically aggregates up to 3.86" (98mm) of precipitation. In West Haven, during December, snow falls for 3.5 days and regularly aggregates up to 1.34" (34mm) of snow.