December weather forecast and climate
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 also a wintry 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 Hartford, the average high-temperature in December drops, from a chilly 48.9°F (9.4°C) in November, to a wintry 38.5°F (3.6°C). In Hartford, in December, the average low-temperature is 27.7°F (-2.4°C).

Humidity

In Hartford, the average relative humidity 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 Hartford, snow falls for 3.5 days, with typically accumulated 0.79" (20mm) of snow. In Hartford, during the entire year, snow falls for 21.5 days, and aggregates up to 4.45" (113mm) of snow.

Daylight

With an average of 9.2h of daylight, December has the shortest days of the year in Hartford.

Sunshine

The average sunshine is 4.8h.

UV index

Months with the lowest UV index 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 minimal health vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 2 interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in December in Hartford?

In December, the average high-temperature is 38.5°F (3.6°C), and the average low-temperature is 27.7°F (-2.4°C).

What is the average humidity in December in Hartford?

In December, the average relative humidity is 78%.

How much does it rain in Hartford in December?

In Hartford, Connecticut, in December, it is raining for 7.6 days, with typically 0.94" (24mm) of accumulated precipitation.

How much does it snow in Hartford in December?

In Hartford, Connecticut, in December, during 3.5 snowfall days, 0.79" (20mm) of snow is typically accumulated.

What is the month with the shortest days in Hartford?

The month with the shortest days is December, with an average of 9.2h of daylight.

How many hours of daylight does Hartford have in December?

In December, the average length of the day in Hartford, Connecticut, is 9.2h.

How long on average sun shines in December in Hartford?

In December, the average sunshine in Hartford, Connecticut, 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 intensity in December in Hartford?

In December, the average daily maximum UV index in Hartford is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV rays.

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"

The month with the highest atmospheric pressure is November (30.09").
The month with the lowest atmospheric pressure is June (29.93").

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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").
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).
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: 9.2h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in December: 4.8h

Months with the most sunshine are July and August (Average sunshine: 10.4h).
The month with the least sunshine is February (Average sunshine: 4.6h).

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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

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

Months with the highest UV index are June, July and August (UV index 6).
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

Months with the highest visibility are January, March, April, October, November and December (6mi).
Months with the lowest visibility are February, May, June, July, August and September (5mi).

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