December weather forecast
Hartford, CT

The city of Hartford, Connecticut with the roads leading to the town, and trees on roadsides
The city of Hartford, Connecticut with the roads leading to the town, and trees on roadsides

Weather in December

December, the first month of the winter in Hartford, is still a cold month, with temperature in the range of an average high of 38.5°F (3.6°C) and an average low of 27.7°F (-2.4°C).

Temperature

In December, the average high-temperature decreases from a frosty 48.9°F (9.4°C) in November to a cold 38.5°F (3.6°C). In December, in Hartford, the average low-temperature is 27.7°F (-2.4°C).

Humidity

In Hartford, the average relative humidity in December is 78%.

Rainfall

In Hartford, during 7.6 rainfall days, 0.94" (24mm) of precipitation is typically accumulated. Throughout the year, in Hartford, Connecticut, there are 113.2 rainfall days, and 10.24" (260mm) of precipitation is accumulated.

Snowfall

January through May, November and December are months with snowfall. In Hartford, during December, snow falls for 3.5 days and regularly aggregates up to 0.79" (20mm) of snow. Throughout the year, there are 21.5 snowfall days, and 4.45" (113mm) of snow is accumulated.

Daylight

With an average of 9h and 13min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 6:58 am and sunset at 4:21 pm. On the last day of December, sunrise is at 7:17 am and sunset at 4:29 pm EST.

Sunshine

In Hartford, 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 low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Hartford?

The average high-temperature, in December, in Hartford, Connecticut, is 38.5°F (3.6°C), while the average low-temperature is 27.7°F (-2.4°C). in August, the average heat index (a.k.a. 'feels like', 'real feel'), which factors the actual air temperature with the relative humidity, is estimated at 86°F (30°C).

What is the average humidity in December in Hartford?

In Hartford, the average relative humidity in December is 78%.

How much does it rain in Hartford in December?

In Hartford, in December, during 7.6 rainfall days, 0.94" (24mm) of precipitation is typically accumulated.

How much does it snow in Hartford in December?

In Hartford, Connecticut, during December, snow falls for 3.5 days and regularly aggregates up to 0.79" (20mm) of snow.

What is the month with the shortest days in Hartford?

December has the shortest days of the year in Hartford, Connecticut, with an average of 9h and 13min of daylight.

What is the average length of the day in December in Hartford?

In Hartford, Connecticut, the average day length in December is 9h and 13min.

When are sunrise and sunset in December in Hartford?

On the first day of December in Hartford, Connecticut, sunrise is at 6:58 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 4:29 pm EST.

How many hours of sunshine does Hartford have in December?

In Hartford, the average sunshine duration in December is 4.8h.

What is the month with the lowest UV index in Hartford?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Hartford.

What is the UV index reading in December in Hartford?

In Hartford, Connecticut, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Hartford, CT

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).

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Average pressure in December
Hartford, CT

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).

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Average wind speed in December
Hartford, CT

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).

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Average humidity in December
Hartford, CT

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%).

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Average rainfall in December
Hartford, CT

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").

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Average rainfall days in December
Hartford, CT

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).

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Average snowfall in December
Hartford, CT

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").

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Average snowfall days in December
Hartford, CT

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).

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Average daylight in December /
Average sunshine in December
Hartford, CT

Average daylight in December / Average sunshine in December - Hartford, CT
  • Average daylight in December: 9h and 13min

The month with the longest days is June (Average daylight: 15h and 10min).
The month with the shortest days is December (Average daylight: 9h and 13min).

  • 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).

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Average sunshine days in December
Hartford, CT

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).

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Average UV index in December
Hartford, CT

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).

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Average cloud cover in December
Hartford, CT

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).

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Average visibility in December
Hartford, CT

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).

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