December weather forecastSayreville, NJ
December
Weather in December
The first month of the winter, December, is still a chilly month in Sayreville, New Jersey, with an average temperature ranging between min 32.7°F (0.4°C) and max 43.3°F (6.3°C).Temperature
In Sayreville, entering December brings a subtle temperature decrement, reducing from November's fresh 52.2°F (11.2°C) to a frosty 43.3°F (6.3°C). In December, Sayreville records an average nighttime temperature of 32.7°F (0.4°C).Humidity
February, May, October and December, with an average relative humidity of 77%, are the most humid months.Rainfall
In Sayreville, during December, the rain falls for 10.6 days and regularly aggregates up to 3.11" (79mm) of precipitation. In Sayreville, during the entire year, the rain falls for 154 days and collects up to 30.75" (781mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In December, it is snowing for 3.1 days. Throughout December, 1.02" (26mm) of snow is accumulated. Throughout the year, in Sayreville, there are 18.1 snowfall days, and 8.35" (212mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Sayreville.On the first day of the month, sunrise is at 7:01 am and sunset at 4:31 pm. On the last day of December, in Sayreville, sunrise is at 7:20 am and sunset at 4:40 pm EST.
Sunshine
The average sunshine in December in Sayreville is 4.9h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Sayreville. 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: The maximum daily UV index of 2 during December translates into the following directions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Around midday, solar radiation is most harmful; hence, exposure should be limited. Boost your sun resistance with garments that are densely woven yet spacious. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sayreville, NJ
- Average high temperature in December: 43.3°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in December: 32.7°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure in December
Sayreville, 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
Sayreville, NJ
- Average wind speed in December: 8.9mph
The windiest months (with the highest average wind speed) are January and March (9.6mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).
Average humidity in December
Sayreville, NJ
- Average humidity in December: 77%
The months with the highest relative humidity are February, May, October and December (77%).
The months with the lowest relative humidity are April and August (73%).
Average rainfall in December
Sayreville, NJ
- Average rainfall in December: 3.11"
The wettest month (with the highest rainfall) is July (3.58").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in December
Sayreville, NJ
- Average rainfall days in December: 10.6 days
The month with the highest number of rainy days is July (17.4 days).
The months with the least rainy days are January and November (8.5 days).
Average snowfall in December
Sayreville, NJ
- Average snowfall in December: 1.02"
The month with the highest snowfall is March (3.82").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Sayreville, NJ
- Average snowfall days in December: 3.1 days
The month with the highest number of snowfall days is February (5.1 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
Sayreville, NJ
- Average daylight in December: 9h and 18min
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: 4h and 54min
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 42min).
Average sunshine days in December
Sayreville, NJ
- Average sunshine days in December: 18 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is July (10.5 days).
Average UV index in December
Sayreville, 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, March, November and December (UV index 2).
Average cloud cover in December
Sayreville, NJ
- Average cloud cover in December: 48
The months with the most cloud cover are February and December (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 31).
Average visibility in December
Sayreville, 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).
