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
As December begins, there is a minor decrease in the average high-temperature, softly falling from a fresh 51.1°F (10.6°C) in November to a cold 42.3°F (5.7°C). Westfield's average low-temperature during December nights is observed to be a freezing cold 31.1°F (-0.5°C).Humidity
February, October and December, with an average relative humidity of 78%, are the most humid months in Westfield.Rainfall
December is the month with the most rainfall in Westfield. Rain falls for 11.5 days and accumulates 3.19" (81mm) of precipitation.Snowfall
Months with snowfall in Westfield are January through May, October through December. In Westfield, New Jersey, in December, during 4.1 snowfall days, 1.46" (37mm) of snow is typically accumulated. Throughout the year, in Westfield, there are 25.4 snowfall days, and 10.31" (262mm) of snow is accumulated.Daylight
December has the shortest days of the year in Westfield, with an average of 9h and 18min of daylight.On the first day of December in Westfield, New Jersey, sunrise is at 7:02 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:40 pm EST.
Sunshine
The average sunshine in December is 4.9h.UV index
The months with the lowest UV index in Westfield 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 low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Frequently asked questions
How cold does it get in Westfield in December?
What is the most humid month in Westfield?
What is the average humidity in December in Westfield?
What is the rainiest month in Westfield?
How much does it rain in Westfield in December?
How many days does it snow in December in Westfield?
What is the month with the shortest days in Westfield?
What is the average length of the day in December in Westfield?
What time are sunrise and sunset in December in Westfield?
How long on average sun shines in December in Westfield?
What are the months with the lowest UV index in Westfield?
What is the UV index intensity in December in Westfield?
Average temperature in December
Westfield, NJ
- Average high temperature in December: 42.3°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (36°F).
- Average low temperature in December: 31.1°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).
Average pressure in December
Westfield, NJ
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Westfield, NJ
- Average wind speed in December: 8.1mph
The windiest month (with the highest average wind speed) is March (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in December
Westfield, NJ
- Average humidity in December: 78%
The months with the highest relative humidity are February, October and December (78%).
The months with the lowest relative humidity are April and August (73%).
Average rainfall in December
Westfield, NJ
- Average rainfall in December: 3.19"
The wettest month (with the highest rainfall) is December (3.19").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days in December
Westfield, NJ
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (9.5 days).
Average snowfall in December
Westfield, NJ
- Average snowfall in December: 1.46"
The month with the highest snowfall is March (3.23").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Westfield, NJ
- Average snowfall days in December: 4.1 days
The months with the highest number of snowfall days are January and February (7.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Westfield, NJ
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Westfield, NJ
- Average sunshine days in December: 15.8 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is June (11.4 days).
Average UV index in December
Westfield, NJ
- 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
Westfield, NJ
- Average cloud cover in December: 48
The months with the most cloud cover are February, March and December (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in December
Westfield, NJ
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Westfield, New Jersey, USA
Weather forecast for your location
2. Allow the app to use your location
