December weather forecastUnion, CT
December
Weather in December
December, the first month of the winter in Union, is still a cold month, with an average temperature ranging between min 26.1°F (-3.3°C) and max 37°F (2.8°C).Temperature
Union's progression into December includes a drop in the average high-temperature, from a frosty 47.3°F (8.5°C) in November to an icy 37°F (2.8°C). Union records a steady low-temperature average of 26.1°F (-3.3°C) during December.Humidity
In Union, the average relative humidity in December is 79%.Rainfall
In Union, in December, it is raining for 9.4 days, with typically 2.64" (67mm) of accumulated precipitation. Throughout the year, in Union, there are 148.3 rainfall days, and 29.21" (742mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Union. In Union, in December, during 5.7 snowfall days, 3.03" (77mm) of snow is typically accumulated. In Union, during the entire year, snow falls for 35.3 days and aggregates up to 19.53" (496mm) of snow.Daylight
The month with the shortest days in Union is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 6:57 am and sunset at 4:18 pm. On the last day of December, sunrise is at 7:16 am and sunset at 4:27 pm EST.
Sunshine
In December, the average sunshine in Union, Connecticut, is 4.5h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Union. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 2 in December converts into the following recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Union, CT
- Average high temperature in December: 37°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (31.3°F).
- Average low temperature in December: 26.1°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in December
Union, CT
- Average pressure in December: 30.04"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Union, CT
- Average wind speed in December: 8.5mph
The windiest months (with the highest average wind speed) are January and February (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in December
Union, CT
- Average humidity in December: 79%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (73%).
Average rainfall in December
Union, CT
- Average rainfall in December: 2.64"
The wettest month (with the highest rainfall) is July (2.76").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in December
Union, CT
- Average rainfall days in December: 9.4 days
The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is January (7.1 days).
Average snowfall in December
Union, CT
- Average snowfall in December: 3.03"
The month with the highest snowfall is February (4.88").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Union, CT
- Average snowfall days in December: 5.7 days
The month with the highest number of snowfall days is January (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
Union, 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 30min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in December
Union, CT
- Average sunshine days in December: 17.1 days
The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is June (13.1 days).
Average UV index in December
Union, 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
Union, CT
- Average cloud cover in December: 50
The month with the most cloud cover is March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in December
Union, CT
- Average visibility in December: 6mi
The months with the highest visibility are March, April, November and December (6mi).
The months with the lowest visibility are January, February, May, June, July, August, September and October (5mi).
