Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Start of December brings a shift in the average high-temperature, falling from November's frosty 48.2°F (9°C) to a wintry 37.6°F (3.1°C). Throughout December nights, Unionville experiences a consistent temperature average of 26.8°F (-2.9°C).Humidity
In December, the average relative humidity is 79%.Rainfall
The month with the most rainfall in Unionville is December, when the rain falls for 10.5 days and typically aggregates up to 3.43" (87mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Unionville, Connecticut, in December, during 6.1 snowfall days, 3.54" (90mm) of snow is typically accumulated. Throughout the year, in Unionville, there are 33.1 snowfall days, and 18.39" (467mm) of snow is accumulated.Daylight
The month with the shortest days in Unionville is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 6:59 am and sunset at 4:21 pm. On the last day of December, sunrise is at 7:18 am and sunset at 4:31 pm EST.
Sunshine
In December, the average sunshine in Unionville is 4.7h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Unionville. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Always opt for UVA and UVB-resistant sunglasses on radiant days. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Unionville in December?
What is the average humidity in December in Unionville?
What is the rainiest month in Unionville?
How much does it rain in Unionville in December?
How many days does it snow in December in Unionville?
What is the month with the shortest days in Unionville?
How many hours of daylight does Unionville have in December?
When are sunrise and sunset in December in Unionville?
How long on average sun shines in December in Unionville?
When is the lowest UV index in Unionville?
How high is the UV index in December in Unionville?
Average temperature in December
Unionville, CT
- Average high temperature in December: 37.6°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32°F).
- Average low temperature in December: 26.8°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in December
Unionville, CT
- Average pressure in December: 30.06"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
Unionville, CT
- Average wind speed in December: 7.8mph
The windiest months (with the highest average wind speed) are January and March (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in December
Unionville, CT
- Average humidity in December: 79%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (71%).
Average rainfall in December
Unionville, CT
- Average rainfall in December: 3.43"
The wettest month (with the highest rainfall) is December (3.43").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in December
Unionville, CT
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (9.4 days).
Average snowfall in December
Unionville, CT
- Average snowfall in December: 3.54"
The month with the highest snowfall is February (5.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Unionville, CT
- Average snowfall days in December: 6.1 days
The month with the highest number of snowfall days is February (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Unionville, CT
- Average daylight in December: 9h and 1min
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 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Unionville, CT
- Average sunshine days in December: 15.7 days
The month with the most sunshine days is January (17.1 days).
The month with the least sunshine days is June (11.6 days).
Average UV index in December
Unionville, 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
Unionville, CT
- Average cloud cover in December: 49
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
Unionville, CT
- Average visibility in December: 6mi
The months with the highest visibility are April, October, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August and September (5mi).
Unionville, Connecticut, USA
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