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 onset of December is marked by a decrease in temperature, transitioning from a frosty 42.8°F (6°C) in November to a subzero cold 30.6°F (-0.8°C). During the month of December, the temperature generally drops to a low average of 21°F (-6.1°C).Humidity
In Morristown, New York, the average relative humidity in December is 86%.Rainfall
In Morristown, New York, in December, it is raining for 9 days, with typically 2.2" (56mm) of accumulated precipitation. Throughout the year, in Morristown, there are 141.7 rainfall days, and 26.34" (669mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In December, in Morristown, it is snowing for 11.4 days. Throughout December, 4.96" (126mm) of snow is accumulated. Throughout the year, in Morristown, New York, there are 56.1 snowfall days, and 24.49" (622mm) of snow is accumulated.Daylight
With an average of 8h and 54min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:19 am and sunset at 4:23 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 4:32 pm EST.
Sunshine
The average sunshine in December in Morristown is 3h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Morristown. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.Note: A maximum high daily UV index of 1 during December translates into the following directions:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Morristown?
What is the average humidity in December in Morristown?
How many days does it rain in December in Morristown?
How many days does it snow in December in Morristown?
What is the month with the shortest days in Morristown?
How many hours of daylight does Morristown have in December?
When is the sunrise / sunset in December in Morristown?
How many hours of sunshine does Morristown have in December?
What are the months with the lowest UV index in Morristown?
What is the UV index intensity in December in Morristown?
Average temperature in December
Morristown, NY
- Average high temperature in December: 30.6°F
The warmest month (with the highest average high temperature) is July (77.2°F).
The month with the lowest average high temperature is January (24.1°F).
- Average low temperature in December: 21°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).
Average pressure in December
Morristown, NY
- Average pressure in December: 30.04"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Morristown, NY
- Average wind speed in December: 8.6mph
The windiest month (with the highest average wind speed) is February (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in December
Morristown, NY
- Average humidity in December: 86%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
Morristown, NY
- Average rainfall in December: 2.2"
The wettest month (with the highest rainfall) is August (2.76").
The driest months (with the least rainfall) are March and November (1.69").
Average rainfall days in December
Morristown, NY
- Average rainfall days in December: 9 days
The month with the highest number of rainy days is July (17.1 days).
The month with the least rainy days is January (5 days).
Average snowfall in December
Morristown, NY
- Average snowfall in December: 4.96"
The month with the highest snowfall is February (6.18").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Morristown, NY
- Average snowfall days in December: 11.4 days
The months with the highest number of snowfall days are January and February (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Morristown, NY
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 3h and 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 2h and 42min).
Average sunshine days in December
Morristown, NY
- Average sunshine days in December: 14.4 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is July (11.1 days).
Average UV index in December
Morristown, 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
Morristown, NY
- Average cloud cover in December: 68
The month with the most cloud cover is February (Cloud cover 71).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
Morristown, NY
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Morristown, New York, USA
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