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 sea temperature 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
In December, the meteorological conditions change slightly, with the average high-temperature moving from a chilly 45.3°F (7.4°C) in November to an icy 36.5°F (2.5°C). The December nights in Westfield show a slight decrease to a mean low-temperature of 29.3°F (-1.5°C).Humidity
In Westfield, the average relative humidity in December is 83%.Rainfall
In Westfield, in December, during 11.4 rainfall days, 2.99" (76mm) of precipitation is typically accumulated. In Westfield, during the entire year, the rain falls for 176.3 days and collects up to 34.65" (880mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Westfield, in December, snow falls for 13.1 days, with typically accumulated 3.7" (94mm) of snow. Throughout the year, in Westfield, there are 66.8 snowfall days, and 22.72" (577mm) of snow is accumulated.Ocean temperature
In December, the average ocean temperature in Westfield is 41.4°F (5.2°C).Note: Being in 41.4°F (5.2°C) waters at 55.4°F (13°C) is discomforting, but anything below 50°F (10°C) can jeopardize breathing and induce cold shock, factoring in physical endurance.
Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:28 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 4:56 pm EST.
Sunshine
In December, the average sunshine in Westfield, New York, is 2.7h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Westfield. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 1 translates into these guidelines:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Westfield in December?
What is the average humidity in December in Westfield?
How many days does it rain in December in Westfield?
How many days does it snow in December in Westfield?
What is the water temperature in December in Westfield?
What is the month with the shortest days in Westfield?
How many hours of daylight does Westfield have in December?
When are sunrise and sunset in December in Westfield?
How many hours of sunshine does Westfield have in December?
What is the month with the lowest UV index in Westfield?
What is the UV index intensity in December in Westfield?
Average temperature in December
Westfield, NY
- Average high temperature in December: 36.5°F
The warmest month (with the highest average high temperature) is July (74.3°F).
The month with the lowest average high temperature is January (29.5°F).
- Average low temperature in December: 29.3°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure in December
Westfield, NY
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Westfield, NY
- Average wind speed in December: 13.8mph
The windiest month (with the highest average wind speed) is January (14.2mph).
The calmest month (with the lowest average wind speed) is July (8mph).
Average humidity in December
Westfield, NY
- Average humidity in December: 83%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are September, October and November (78%).
Average rainfall in December
Westfield, NY
- Average rainfall in December: 2.99"
The wettest month (with the highest rainfall) is October (3.39").
The driest month (with the least rainfall) is September (2.2").
Average rainfall days in December
Westfield, NY
- Average rainfall days in December: 11.4 days
The month with the highest number of rainy days is October (18.9 days).
The month with the least rainy days is January (8.7 days).
Average snowfall in December
Westfield, NY
- Average snowfall in December: 3.7"
The month with the highest snowfall is February (6.3").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Westfield, NY
- Average snowfall days in December: 13.1 days
The month with the highest number of snowfall days is January (16.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in December
Westfield, NY
- Average sea temperature in December: 41.3°F
The best month for swimming (with the highest average sea temperature) is August (75.1°F).
The coldest month (with the lowest average sea temperature) is February (33.2°F).
Average daylight in December /
Average sunshine in December
Westfield, NY
- 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 6min).
- Average sunshine in December: 2h and 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in December
Westfield, NY
- Average sunshine days in December: 6.8 days
The month with the most sunshine days is September (13.2 days).
The month with the least sunshine days is January (5.3 days).
Average UV index in December
Westfield, NY
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Westfield, NY
- Average cloud cover in December: 73
The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Westfield, NY
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Westfield, New York, USA
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