December weather forecastRahway, NJ
December
Weather in December
The first month of the winter, December, is still a cold month in Rahway, New Jersey, with temperature in the range of an average high of 42.4°F (5.8°C) and an average low of 32.9°F (0.5°C).Temperature
The onset of December results in a small decrease in the average high-temperature, moderately receding from a cool 51.3°F (10.7°C) in November to a wintry 42.4°F (5.8°C). December's average low-temperature reading in Rahway, New Jersey, settles at a still icy 32.9°F (0.5°C).Humidity
In December, the average relative humidity is 76%.Rainfall
In Rahway, in December, during 7.3 rainfall days, 0.83" (21mm) of precipitation is typically accumulated. Throughout the year, there are 110.2 rainfall days, and 8.9" (226mm) of precipitation is accumulated.Snowfall
Months with snowfall in Rahway are January through April, November and December. In December, in Rahway, it is snowing for 2.8 days. Throughout December, 0.24" (6mm) of snow is accumulated. In Rahway, during the entire year, snow falls for 14.5 days and aggregates up to 1.85" (47mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:02 am and sunset at 4:30 pm. On the last day of December, in Rahway, New Jersey, sunrise is at 7:20 am and sunset at 4:40 pm EST.
Sunshine
In Rahway, New Jersey, the average sunshine in December 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. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The daily maximum UV index of 2 in December interprets into the following advice:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Opt for tightly woven and loose clothing to enhance protection from the Sun. Observe! Snow reflection can nearly intensify 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
Rahway, NJ
- Average high temperature in December: 42.4°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (36.5°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure in December
Rahway, 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
Rahway, 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 (6.3mph).
Average humidity in December
Rahway, NJ
- Average humidity in December: 76%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is August (72%).
Average rainfall in December
Rahway, NJ
- Average rainfall in December: 0.83"
The wettest month (with the highest rainfall) is July (1.22").
The driest month (with the least rainfall) is September (0.39").
Average rainfall days in December
Rahway, NJ
- Average rainfall days in December: 7.3 days
The month with the highest number of rainy days is July (12.7 days).
The month with the least rainy days is January (4.9 days).
Average snowfall in December
Rahway, NJ
- Average snowfall in December: 0.24"
The month with the highest snowfall is March (0.83").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Rahway, NJ
- Average snowfall days in December: 2.8 days
The month with the highest number of snowfall days is February (4.2 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
Rahway, 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 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Rahway, NJ
- Average sunshine days in December: 21.3 days
The month with the most sunshine days is January (22.6 days).
The month with the least sunshine days is July (14.8 days).
Average UV index in December
Rahway, 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
Rahway, NJ
- Average cloud cover in December: 47
The months with the most cloud cover are February, March and December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in December
Rahway, 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).
