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
December shows a mild decline in the average high-temperature, falling from November's fresh 50.4°F (10.2°C) to an icy 40.5°F (4.7°C). Nighttime temperatures consistently average a freezing cold 29.7°F (-1.3°C) during December.Humidity
In Brockton, the average relative humidity in December is 77%.Rainfall
December is the month with the most rainfall. Rain falls for 10.4 days and accumulates 3.11" (79mm) of precipitation.Snowfall
Months with snowfall are January through May, November and December. In Brockton, Massachusetts, during December, snow falls for 4.5 days and regularly aggregates up to 2.52" (64mm) of snow. Throughout the year, there are 27.4 snowfall days, and 15" (381mm) 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 the month, sunrise is at 6:53 am and sunset at 4:13 pm. On the last day of December, sunrise is at 7:12 am and sunset at 4:22 pm EST.
Sunshine
In Brockton, the average sunshine in December is 4.7h.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 reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: An average UV index of 2 in December transforms into this advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold during December?
What is the average humidity in December?
What is the rainiest month?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days in Brockton?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Brockton have in December?
When is the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Brockton, MA
- Average high temperature in December: 40.5°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (34.5°F).
- Average low temperature in December: 29.7°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).
Average pressure in December
Brockton, MA
- Average pressure in December: 30.03"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
Brockton, MA
- Average wind speed in December: 8.5mph
The windiest month (with the highest average wind speed) is March (9.1mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in December
Brockton, MA
- Average humidity in December: 77%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (71%).
Average rainfall in December
Brockton, MA
- Average rainfall in December: 3.11"
The wettest month (with the highest rainfall) is December (3.11").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in December
Brockton, MA
- Average rainfall days in December: 10.4 days
The month with the highest number of rainy days is July (15.9 days).
The month with the least rainy days is February (7.8 days).
Average snowfall in December
Brockton, MA
- Average snowfall in December: 2.52"
The month with the highest snowfall is March (4.17").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Brockton, MA
- Average snowfall days in December: 4.5 days
The month with the highest number of snowfall days is January (7.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Brockton, 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 month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Brockton, MA
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is July (13.1 days).
Average UV index in December
Brockton, 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
Brockton, MA
- Average cloud cover in December: 49
The month with the most cloud cover is March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
Brockton, MA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Brockton, Massachusetts, USA
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