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
Westwood in December demonstrates a small temperature transition, adjusting from an average high of a chilly 49.6°F (9.8°C) in November to a cold 40.1°F (4.5°C). An average minimum temperature of 28.9°F (-1.7°C) marks the month of December in Westwood.Humidity
The average relative humidity in December in Westwood is 77%.Rainfall
In Westwood, in December, it is raining for 6.6 days, with typically 0.67" (17mm) of accumulated precipitation. In Westwood, during the entire year, the rain falls for 97.1 days and collects up to 7.13" (181mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. The months with the most snowfall in Westwood are March and December, with an average 0.91" (23mm) of accumulated snow.Daylight
The month with the shortest days in Westwood is December, with an average of 9h and 12min of daylight.On the first day of December in Westwood, Massachusetts, sunrise is at 6:54 am and sunset at 4:13 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 4:22 pm EST.
Sunshine
In Westwood, the average sunshine in December is 4.9h.UV index
The months with the lowest UV index in Westwood, Massachusetts, 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 unsafe exposure to UV radiation for average individuals.Note: In December, an average UV index of 2 transforms into the following instructions:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Frequently asked questions
How cold is it in Westwood in December?
What is the average humidity in December in Westwood?
How many days does it rain in December in Westwood?
When does it snow the most in Westwood?
How much does it snow in Westwood in December?
What is the month with the shortest days in Westwood?
How many hours of daylight does Westwood have in December?
What time are sunrise and sunset in December in Westwood?
How long on average sun shines in December in Westwood?
When is the lowest UV index in Westwood?
How high is the UV index in December in Westwood?
Average temperature in December
Westwood, MA
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (34.3°F).
- Average low temperature in December: 28.9°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).
Average pressure in December
Westwood, 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
Westwood, MA
- Average wind speed in December: 8.4mph
The windiest months (with the highest average wind speed) are January, February and March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in December
Westwood, 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 (70%).
Average rainfall in December
Westwood, MA
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is April (0.79").
The driest month (with the least rainfall) is September (0.31").
Average rainfall days in December
Westwood, MA
- Average rainfall days in December: 6.6 days
The month with the highest number of rainy days is July (11.7 days).
The month with the least rainy days is February (5.1 days).
Average snowfall in December
Westwood, MA
- Average snowfall in December: 0.91"
The months with the highest snowfall are March and December (0.91").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Westwood, MA
- Average snowfall days in December: 3 days
The month with the highest number of snowfall days is January (5 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
Westwood, 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 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Westwood, MA
- Average sunshine days in December: 21.1 days
The month with the most sunshine days is November (22 days).
The month with the least sunshine days is July (16.8 days).
Average UV index in December
Westwood, 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
Westwood, MA
- Average cloud cover in December: 47
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Westwood, 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).
Westwood, Massachusetts, USA
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