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
The onset of December is marked by a minor decrease in temperature, transitioning from a chilly 49.8°F (9.9°C) in November to a wintry 41.2°F (5.1°C). Nighttime temperature reflects an average dip to a still icy 32.7°F (0.4°C) in December, subtly cooler than its daytime highs.Humidity
In Norwell, the average relative humidity in December is 76%.Rainfall
In Norwell, during December, the rain falls for 8.1 days and regularly aggregates up to 0.98" (25mm) of precipitation. Throughout the year, there are 119.1 rainfall days, and 10.83" (275mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In Norwell, in December, during 4 snowfall days, 0.63" (16mm) of snow is typically accumulated. Throughout the year, there are 23.1 snowfall days, and 2.95" (75mm) of snow is accumulated.Daylight
December has the shortest days of the year in Norwell, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 6:52 am and sunset at 4:12 pm. On the last day of December, sunrise is at 7:11 am and sunset at 4:21 pm EST.
Sunshine
The months with the least sunshine are February and December, with an average of 4.8h of sunshine.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 minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 2 translates into these guidelines:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in Norwell in December?
What is the month with the shortest days in Norwell?
What is the average length of the day in December?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Norwell have in December?
What is the month with the lowest UV index?
How high is the UV index in December in Norwell?
Average temperature in December
Norwell, MA
- Average high temperature in December: 41.2°F
The warmest month (with the highest average high temperature) is July (76.5°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in December: 32.7°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).
Average pressure in December
Norwell, MA
- Average pressure in December: 30.03"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Norwell, MA
- Average wind speed in December: 12.2mph
The windiest month (with the highest average wind speed) is January (12.9mph).
The calmest months (with the lowest average wind speed) are July and August (8mph).
Average humidity in December
Norwell, MA
- Average humidity in December: 76%
The months with the highest relative humidity are June and July (79%).
The months with the lowest relative humidity are April and November (74%).
Average rainfall in December
Norwell, MA
- Average rainfall in December: 0.98"
The wettest month (with the highest rainfall) is July (1.26").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in December
Norwell, MA
- Average rainfall days in December: 8.1 days
The month with the highest number of rainy days is July (13 days).
The month with the least rainy days is February (6.5 days).
Average snowfall in December
Norwell, MA
- Average snowfall in December: 0.63"
The month with the highest snowfall is February (0.79").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Norwell, MA
- Average snowfall days in December: 4 days
The months with the highest number of snowfall days are January and February (6.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Norwell, 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 5min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in December
Norwell, MA
- Average sunshine days in December: 18.6 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (15.9 days).
Average UV index in December
Norwell, MA
- Average UV index in December: 2
The months with the highest UV index are 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
Norwell, MA
- Average cloud cover in December: 48
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Norwell, 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).
Norwell, Massachusetts, USA
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