December weather forecastManchester, CT
December
Weather in December
December in Manchester is a time when the city truly steps into the winter season. This month witnesses short days, less sunshine, and rapidly falling temperatures. The cityscape transforms as snowfall occurs, giving the city a festive and beautiful white look. Intermittent snowfall takes place in Manchester, with an accumulated average of 3.15" (80mm) laying a blanket over the city. Despite lower temperatures, December's weather seems fitting, as it perfectly aligns with the holiday spirit of the month.Temperature
Onset of December comes with a temperature decline, the average high falling from a frosty 48.9°F (9.4°C) in November to a wintry 38.7°F (3.7°C). Nightly temperatures drop to an average low of 28°F (-2.2°C) in December.Humidity
In December, the average relative humidity is 78%.Rainfall
December is the month with the most rainfall. Rain falls for 11.8 days and accumulates 3.27" (83mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Manchester, in December, snow falls for 5.8 days, with typically accumulated 3.15" (80mm) of snow. In Manchester, during the entire year, snow falls for 31.6 days and aggregates up to 17.13" (435mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 6:58 am and sunset at 4:20 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 4:29 pm EST.
Sunshine
In Manchester, the average sunshine in December is 4.8h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A daily maximum UV index of 2 in December translates into the following instructions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Manchester, CT
- Average high temperature in December: 38.7°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (32.9°F).
- Average low temperature in December: 28°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure in December
Manchester, CT
- Average pressure in December: 30.05"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Manchester, CT
- Average wind speed in December: 7.8mph
The windiest months (with the highest average wind speed) are January and March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Manchester, CT
- Average humidity in December: 78%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (71%).
Average rainfall in December
Manchester, CT
- Average rainfall in December: 3.27"
The wettest month (with the highest rainfall) is December (3.27").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in December
Manchester, CT
- Average rainfall days in December: 11.8 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (10 days).
Average snowfall in December
Manchester, CT
- Average snowfall in December: 3.15"
The month with the highest snowfall is February (4.8").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Manchester, CT
- Average snowfall days in December: 5.8 days
The month with the highest number of snowfall days is February (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Manchester, CT
- Average daylight in December: 9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 48min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Manchester, CT
- Average sunshine days in December: 15.1 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (11.2 days).
Average UV index in December
Manchester, CT
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Manchester, CT
- Average cloud cover in December: 48
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Manchester, CT
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are February, May and September (5mi).
