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
In Hartford, the average high-temperature in December drops from a frosty 48.9°F (9.4°C) in November to a cold 38.5°F (3.6°C). During December, Hartford observes a consistent average nighttime temperature of 27.7°F (-2.4°C).Humidity
In Hartford, Connecticut, the average relative humidity in December is 78%.Rainfall
In Hartford, during December, the rain falls for 7.6 days and regularly aggregates up to 0.94" (24mm) of precipitation. In Hartford, during the entire year, the rain falls for 113.2 days and collects up to 10.24" (260mm) of precipitation.Snowfall
Months with snowfall in Hartford are January through May, November and December. In December, in Hartford, it is snowing for 3.5 days. Throughout December, 0.79" (20mm) of snow is accumulated. In Hartford, during the entire year, snow falls for 21.5 days and aggregates up to 4.45" (113mm) of snow.Daylight
December has the shortest days of the year in Hartford, 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 4:20 pm. On the last day of December, in Hartford, sunrise is at 7:17 am and sunset at 4:30 pm EST.
Sunshine
The average sunshine in December in Hartford, Connecticut, is 4.8h.UV index
The months with the lowest UV index in Hartford are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold in Hartford during December?
What is the average humidity in December in Hartford?
How much does it rain in Hartford in December?
How much does it snow in Hartford in December?
What is the month with the shortest days in Hartford?
How many hours of daylight does Hartford have in December?
What time are sunrise and sunset in December in Hartford?
How many hours of sunshine does Hartford have in December?
What is the month with the lowest UV index in Hartford?
How high is the UV index in December in Hartford?
Average temperature in December
Hartford, CT
- Average high temperature in December: 38.5°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (33.1°F).
- Average low temperature in December: 27.7°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure in December
Hartford, 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
Hartford, 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 months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in December
Hartford, CT
- Average humidity in December: 78%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (70%).
Average rainfall in December
Hartford, CT
- Average rainfall in December: 0.94"
The wettest months (with the highest rainfall) are June and July (1.06").
The driest month (with the least rainfall) is September (0.43").
Average rainfall days in December
Hartford, CT
- Average rainfall days in December: 7.6 days
The month with the highest number of rainy days is July (11.8 days).
The month with the least rainy days is February (6.8 days).
Average snowfall in December
Hartford, CT
- Average snowfall in December: 0.79"
The month with the highest snowfall is February (1.14").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Hartford, CT
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is February (5.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Hartford, 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 5min
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
Hartford, CT
- Average sunshine days in December: 19.5 days
The months with the most sunshine days are January and November (20.4 days).
The month with the least sunshine days is June (16.3 days).
Average UV index in December
Hartford, CT
- Average UV index in December: 2
The months with the highest UV index are June, July and August (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
Hartford, 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
Hartford, CT
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, October, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August and September (5mi).
Hartford, Connecticut, USA
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