December weather - Winter 2024

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

Buildings and a sign of Worcester in Massachusetts

Weather in December

December ushers in Worcester's winter, evidenced by an increased snowfall of 3.5" (89mm). It paints a beautiful holiday atmosphere across the city, just in time for Christmas. The gradually reducing daylight duration and temperatures foretell a full-fledged winter scenario in the upcoming months. The mixing sight of twinkling holiday lights and freshly-fallen snow sets a quaint, festive mood throughout the city. December, therefore, waves the flag for a sparkling, icy, and festive winter in Worcester, Massachusetts.

Temperature

The arrival of December signals a shift in temperature, down from a chilly 46.8°F (8.2°C) in November to a wintry 36.5°F (2.5°C). During December, Worcester records an average temperature of 25.9°F (-3.4°C) at night.

Humidity

In December, the average relative humidity is 79%.

Rainfall

The month with the most rainfall is December, when the rain falls for 9.1 days and typically aggregates up to 2.76" (70mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In Worcester, during December, snow falls for 6.8 days and regularly aggregates up to 3.5" (89mm) of snow. Throughout the year, there are 39.9 snowfall days, and 24.45" (621mm) of snow is accumulated.

Daylight

With an average of 9h and 12min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 6:57 am and sunset at 4:15 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 4:25 pm EST.

Sunshine

In December, the average sunshine is 4.6h.

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 health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: A typical high UV index of 2 in December suggests the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Enhance your sun protection with tightly woven, yet airy clothing. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.

Updated: Jun 4, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

In December, in Worcester, the average high-temperature is 36.5°F (2.5°C), and the average low-temperature is 25.9°F (-3.4°C). In July, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines air temperature and relative humidity, is computed to be 86°F (30°C).

What is the average humidity in December in Worcester?

In Worcester, the average relative humidity in December is 79%.

What is the wettest month?

The month with the most rainfall in Worcester is December, when the rain falls for 9.1 days and typically aggregates up to 2.76" (70mm) of precipitation.

How much does it rain in December?

In Worcester, during December, the rain falls for 9.1 days and regularly aggregates up to 2.76" (70mm) of precipitation.

How much does it snow in December?

In Worcester, during December, snow falls for 6.8 days and regularly aggregates up to 3.5" (89mm) of snow.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 12min of daylight.

How many hours of daylight does Worcester have in December?

In Worcester, the average day length in December is 9h and 9min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 6:57 am and sunset at 4:15 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 4:25 pm EST.

How many hours of sunshine does Worcester have in December?

The average sunshine duration in December is 4.6h.

What is the month with the lowest UV index?

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

What is the UV index intensity in December?

In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

46.8°F 8.2°C

36.5°F 2.5°C

30.9°F -0.6°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

8.8mph 14.2km/h

9.2mph 14.8km/h

9.6mph 15.4km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

17.8

17.1

16.8

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Worcester, MA

Average high temperature in December: 36.5°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30.9°F).

Average low temperature in December: 25.9°F

The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

Average pressure in December
Worcester, MA

Average pressure in December: 30.04"Hg

The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Worcester, MA

Average wind speed in December: 8.6mph

The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).

Average humidity in December
Worcester, MA

Average humidity in December: 79%

The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (72%).

Average rainfall in December
Worcester, MA

Average rainfall in December: 2.76"

The wettest month (with the highest rainfall) is December (2.76").
The driest month (with the least rainfall) is September (1.69").

Average rainfall days in December
Worcester, MA

Average rainfall days in December: 9.1 days

The month with the highest number of rainy days is May (16.3 days).
The months with the least rainy days are January and February (6.8 days).

Average snowfall in December
Worcester, MA

Average snowfall in December: 3.5"

The month with the highest snowfall is February (6.06").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Worcester, MA

Average snowfall days in December: 6.8 days

The month with the highest number of snowfall days is February (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Worcester, MA

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 0min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

Average sunshine days in December
Worcester, MA

Average sunshine days in December: 17.1 days

The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is June (12.8 days).

Average UV index in December
Worcester, MA

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
Worcester, MA

Average cloud cover in December: 49

The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 36).

Average visibility in December
Worcester, MA

Average visibility in December: 6mi

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

December weather forecast
Worcester, MA

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