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 beginning of December involves a decrease in the average high-temperature, transitioning from a chilly 49.8°F (9.9°C) in November to a cold 40.1°F (4.5°C). During December, the nighttime temperature averages to a freezing cold 29.1°F (-1.6°C).Humidity
The months with the highest humidity are February, October and December, with an average relative humidity of 80%.Rainfall
December is the month with the most rainfall in Boonton. Rain falls for 11.2 days and accumulates 3.43" (87mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Boonton, New Jersey, in December, snow falls for 4.7 days, with typically accumulated 2.24" (57mm) of snow. In Boonton, during the entire year, snow falls for 30.9 days and aggregates up to 15.79" (401mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:03 am and sunset at 4:30 pm. On the last day of December, sunrise is at 7:22 am and sunset at 4:39 pm EST.
Sunshine
In December, the average sunshine in Boonton is 4.8h.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 estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the average person.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Frequently asked questions
Is December cold in Boonton?
What is the most humid month in Boonton?
What is the average humidity in December in Boonton?
What is the rainiest month in Boonton?
How many days does it rain in December in Boonton?
How many days does it snow in December in Boonton?
What is the month with the shortest days in Boonton?
What is the average length of the day in December in Boonton?
When is the sunrise / sunset in December in Boonton?
How long on average sun shines in December in Boonton?
When is the lowest UV index in Boonton?
What is the UV index reading in December in Boonton?
Average temperature in December
Boonton, NJ
- Average high temperature in December: 40.1°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 (34.5°F).
- Average low temperature in December: 29.1°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in December
Boonton, 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
Boonton, NJ
- Average wind speed in December: 7.5mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Boonton, NJ
- Average humidity in December: 80%
The months with the highest relative humidity are February, October and December (80%).
The month with the lowest relative humidity is April (74%).
Average rainfall in December
Boonton, NJ
- Average rainfall in December: 3.43"
The wettest month (with the highest rainfall) is December (3.43").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in December
Boonton, NJ
- Average rainfall days in December: 11.2 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in December
Boonton, NJ
- Average snowfall in December: 2.24"
The month with the highest snowfall is March (4.69").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Boonton, NJ
- Average snowfall days in December: 4.7 days
The month with the highest number of snowfall days is February (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Boonton, 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 12min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in December
Boonton, NJ
- Average sunshine days in December: 16.1 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is April (11.2 days).
Average UV index in December
Boonton, 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
Boonton, NJ
- Average cloud cover in December: 50
The months with the most cloud cover are February, March and December (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 35).
Average visibility in December
Boonton, NJ
- Average visibility in December: 6mi
The months with the highest visibility are January, April, July, August, October, November and December (6mi).
The months with the lowest visibility are February, March, May, June and September (5mi).
Boonton, New Jersey, USA
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