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 cool 52.2°F (11.2°C) in November to a chilly 43.9°F (6.6°C). Port Monmouth notes an average temperature descent to an icy 35.4°F (1.9°C) in December, a small shift from its daytime peak.Humidity
In December, the average relative humidity is 76%.Rainfall
In Port Monmouth, during December, the rain falls for 9.3 days and regularly aggregates up to 1.14" (29mm) of precipitation. Throughout the year, there are 127 rainfall days, and 12.99" (330mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March, October through December. The months with the most snowfall are January and December, with an average 0.47" (12mm) of accumulated 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 7:00 am and sunset at 4:30 pm. On the last day of December, sunrise is at 7:19 am and sunset at 4:40 pm EST.
Sunshine
In Port Monmouth, New Jersey, the average sunshine in December is 5.1h.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 value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 2 during December leads to these advisories:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Port Monmouth?
What is the average humidity in December?
How many days does it rain in December?
What is the snowiest month?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Port Monmouth have in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Port Monmouth, NJ
- Average high temperature in December: 43.9°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in December: 35.4°F
The month with the highest average low temperature is July (70.5°F).
The coldest month (with the lowest average low temperature) is January (27.9°F).
Average pressure in December
Port Monmouth, 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
Port Monmouth, NJ
- Average wind speed in December: 11mph
The windiest month (with the highest average wind speed) is January (11.7mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).
Average humidity in December
Port Monmouth, NJ
- Average humidity in December: 76%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is November (73%).
Average rainfall in December
Port Monmouth, NJ
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is July (1.69").
The driest month (with the least rainfall) is January (0.63").
Average rainfall days in December
Port Monmouth, NJ
- Average rainfall days in December: 9.3 days
The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is January (6.6 days).
Average snowfall in December
Port Monmouth, NJ
- Average snowfall in December: 0.47"
The months with the highest snowfall are January and December (0.47").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in December
Port Monmouth, NJ
- Average snowfall days in December: 3.4 days
The month with the highest number of snowfall days is January (4.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Port Monmouth, 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: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Port Monmouth, NJ
- Average sunshine days in December: 18 days
The month with the most sunshine days is November (21.2 days).
The month with the least sunshine days is July (13.2 days).
Average UV index in December
Port Monmouth, 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
Port Monmouth, NJ
- Average cloud cover in December: 46
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Port Monmouth, NJ
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Port Monmouth, New Jersey, USA
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