December weather forecastNorma, NJ
December
Weather in December
December, the first month of the winter in Norma, is still a chilly month, with an average temperature ranging between max 45.3°F (7.4°C) and min 34.2°F (1.2°C).Temperature
Norma's weather in December involves a mild decrease in the average high-temperature, moving down slightly from November's cool 53.8°F (12.1°C) to a chilly 45.3°F (7.4°C). During December, Norma witnesses a consistent average low-temperature of 34.2°F (1.2°C).Humidity
The average relative humidity in December in Norma is 77%.Rainfall
In Norma, in December, during 9.2 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. Throughout the year, there are 119.7 rainfall days, and 15" (381mm) of precipitation is accumulated.Snowfall
Months with snowfall in Norma are January through April, November and December. In Norma, New Jersey, during December, snow falls for 2.3 days and regularly aggregates up to 0.51" (13mm) of snow. In Norma, New Jersey, during the entire year, snow falls for 13.6 days and aggregates up to 4.29" (109mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year in Norma.On the first day of the month, sunrise is at 7:02 am and sunset at 4:37 pm. On the last day of December, in Norma, sunrise is at 7:20 am and sunset at 4:46 pm EST.
Sunshine
In Norma, New Jersey, the average sunshine in December is 5h.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 of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the maximum UV index of 2 suggests these recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Norma, NJ
- Average high temperature in December: 45.3°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in December: 34.2°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (27°F).
Average pressure in December
Norma, NJ
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Norma, NJ
- Average wind speed in December: 7.9mph
The windiest month (with the highest average wind speed) is April (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in December
Norma, NJ
- Average humidity in December: 77%
The months with the highest relative humidity are June, September and October (79%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Norma, NJ
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is July (1.77").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in December
Norma, NJ
- Average rainfall days in December: 9.2 days
The month with the highest number of rainy days is July (14.5 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in December
Norma, NJ
- Average snowfall in December: 0.51"
The month with the highest snowfall is January (1.38").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Norma, NJ
- Average snowfall days in December: 2.3 days
The month with the highest number of snowfall days is January (4.5 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
Norma, NJ
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Norma, NJ
- Average sunshine days in December: 20 days
The month with the most sunshine days is November (21.7 days).
The month with the least sunshine days is July (14.8 days).
Average UV index in December
Norma, NJ
- Average UV index in December: 2
The months with the highest UV index are May, 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
Norma, NJ
- Average cloud cover in December: 47
The months with the most cloud cover are February and March (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 31).
Average visibility in December
Norma, 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).
