December weather forecastMandalay, NJ
December
Weather in December
The first month of the winter, December, is still a chilly month in Mandalay, New Jersey, with an average temperature varying between 37°F (2.8°C) and 45°F (7.2°C).Temperature
December witnesses a gentle descent in average high-temperature, descending from November's fresh 52.9°F (11.6°C) to a frosty 45°F (7.2°C). The nighttime temperature in December experiences a minor dip, averaging a wintry 37°F (2.8°C).Humidity
The average relative humidity in December is 76%.Rainfall
In Mandalay, New Jersey, in December, during 9.4 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. In Mandalay, during the entire year, the rain falls for 132 days and collects up to 17.17" (436mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. The month with the most snowfall is December, when snow falls for 2.1 days and typically aggregates up to 0.75" (19mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:59 am and sunset at 4:31 pm. On the last day of December, in Mandalay, sunrise is at 7:18 am and sunset at 4:41 pm EST.
Sunshine
The average sunshine in December is 5.1h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Mandalay, NJ
- Average high temperature in December: 45°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in December: 37°F
The months with the highest average low temperature are July and August (71.2°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).
Average pressure in December
Mandalay, 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
Mandalay, NJ
- Average wind speed in December: 12.4mph
The windiest month (with the highest average wind speed) is January (13.2mph).
The calmest month (with the lowest average wind speed) is July (8.5mph).
Average humidity in December
Mandalay, NJ
- Average humidity in December: 76%
The months with the highest relative humidity are May and June (80%).
The months with the lowest relative humidity are January and November (74%).
Average rainfall in December
Mandalay, NJ
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is July (2.24").
The driest month (with the least rainfall) is January (0.83").
Average rainfall days in December
Mandalay, NJ
- Average rainfall days in December: 9.4 days
The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is January (6.7 days).
Average snowfall in December
Mandalay, NJ
- Average snowfall in December: 0.75"
The month with the highest snowfall is December (0.75").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Mandalay, NJ
- Average snowfall days in December: 2.1 days
The month with the highest number of snowfall days is January (3.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Mandalay, NJ
- Average daylight in December: 9h and 24min
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 24min).
- Average sunshine in December: 5h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in December
Mandalay, NJ
- Average sunshine days in December: 18.5 days
The month with the most sunshine days is November (20.3 days).
The month with the least sunshine days is July (13.7 days).
Average UV index in December
Mandalay, 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, November and December (UV index 2).
Average cloud cover in December
Mandalay, NJ
- Average cloud cover in December: 47
The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Mandalay, 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).
