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's arrival comes with a decrease in the average high-temperature, moving from a chilly 48.6°F (9.2°C) in November to an icy 38.8°F (3.8°C). Hewitt experiences a nighttime temperature average of 27.9°F (-2.3°C) during December.Humidity
The months with the highest humidity in Hewitt are February, October and December, with an average relative humidity of 81%.Rainfall
In Hewitt, in December, it is raining for 9.2 days, with typically 2.32" (59mm) of accumulated precipitation. In Hewitt, during the entire year, the rain falls for 152.2 days and collects up to 26.34" (669mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Hewitt, in December, during 5.5 snowfall days, 2.68" (68mm) of snow is typically accumulated. Throughout the year, in Hewitt, there are 32 snowfall days, and 17.05" (433mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:03 am and sunset at 4:29 pm. On the last day of December, in Hewitt, sunrise is at 7:22 am and sunset at 4:38 pm EST.
Sunshine
In December, the average sunshine in Hewitt, New Jersey, is 4.8h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 2 in December converts into the following recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Frequently asked questions
How cold is it in Hewitt in December?
What are the most humid months in Hewitt?
What is the average humidity in December in Hewitt?
How many days does it rain in December in Hewitt?
How many days does it snow in December in Hewitt?
What is the month with the shortest days in Hewitt?
What is the average length of the day in December in Hewitt?
What time are sunrise and sunset in December in Hewitt?
How many hours of sunshine does Hewitt have in December?
When is the lowest UV index in Hewitt?
What is the UV index reading in December in Hewitt?
Average temperature in December
Hewitt, NJ
- Average high temperature in December: 38.8°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (33.3°F).
- Average low temperature in December: 27.9°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in December
Hewitt, NJ
- Average pressure in December: 30.07"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
Hewitt, NJ
- Average wind speed in December: 7mph
The windiest months (with the highest average wind speed) are January, February and March (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Hewitt, NJ
- Average humidity in December: 81%
The months with the highest relative humidity are February, October and December (81%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Hewitt, NJ
- Average rainfall in December: 2.32"
The wettest month (with the highest rainfall) is July (2.95").
The driest months (with the least rainfall) are January, February and September (1.54").
Average rainfall days in December
Hewitt, NJ
- Average rainfall days in December: 9.2 days
The month with the highest number of rainy days is July (17.5 days).
The month with the least rainy days is January (6.9 days).
Average snowfall in December
Hewitt, NJ
- Average snowfall in December: 2.68"
The month with the highest snowfall is February (4.37").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Hewitt, NJ
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is February (9.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Hewitt, NJ
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
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 18min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in December
Hewitt, NJ
- Average sunshine days in December: 16.8 days
The months with the most sunshine days are January and November (18.6 days).
The months with the least sunshine days are June and July (11.3 days).
Average UV index in December
Hewitt, 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
Hewitt, NJ
- Average cloud cover in December: 49
The months with the most cloud cover are February and March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
Hewitt, NJ
- Average visibility in December: 6mi
The months with the highest visibility are April, August, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, September and October (5mi).
Hewitt, New Jersey, USA
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