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.

---

• 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, the rain falls for 7.6 days and regularly aggregates up to 0.94" (24mm) of precipitation.
• 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. 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.
• Stamford - December »
  In Stamford in December, during 3.9 snowfall days, 1.65" (42mm) of snow is typically accumulated. The months with the highest humidity in Stamford are February, May, June and December, with an average relative humidity of 75%.
• Bridgeport - December »
  The month with the most rainfall in Bridgeport is December, when the rain falls for 12.7 days and typically aggregates up to 4.21" (107mm) of precipitation. In Bridgeport in December, during 4.3 snowfall days, 1.81" (46mm) of snow is typically accumulated.
• Waterbury - December »
  In Waterbury, during December, the rain falls for 10.5 days and regularly aggregates up to 3.78" (96mm) of precipitation. In Waterbury, in December, snow falls for 6.2 days, with typically accumulated 2.87" (73mm) of snow.
• Norwalk - December »
  In Norwalk, in December, snow falls for 3.6 days, with typically accumulated 1.77" (45mm) of snow. In Norwalk, during December, snow falls for 3.6 days and regularly aggregates up to 1.77" (45mm) of snow.
• Danbury - December »
  In Danbury in December, during 4.1 snowfall days, 0.55" (14mm) of snow is typically accumulated. In December, in Danbury the rain falls for 8.1 days.
• New Britain - December »
  In New Britain during December, the rain falls for 12.1 days and regularly 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 »
  In Bristol, during December, snow falls for 6.4 days and regularly aggregates up to 3.23" (82mm) of snow. In Bristol, during December, snow falls for 6.4 days and regularly aggregates up to 3.23" (82mm) of snow.
• Meriden - December »
  The month with the most rainfall in Meriden is December, when the rain falls for 11.5 days and typically aggregates up to 3.82" (97mm) of precipitation. The month with the most rainfall in Meriden is December, when the rain falls for 11.5 days and typically aggregates up to 3.82" (97mm) of precipitation.
• Milford - December »
  In Milford, in December, snow falls for 3.7 days, with typically accumulated 1.65" (42mm) of snow. In Milford, in December, during 3.7 snowfall days, 1.65" (42mm) of snow is typically accumulated.
• 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, the rain falls for 12.5 days and regularly aggregates up to 3.86" (98mm) of precipitation.