December weather forecastRio Grande, NJ
December
Weather in December
The first month of the winter, December, is still a chilly month in Rio Grande, New Jersey, with an average temperature ranging between min 39.4°F (4.1°C) and max 46.8°F (8.2°C).Temperature
The onset of December brings a small shift in high-temperatures, falling from a cool 54.5°F (12.5°C) in November to a frosty 46.8°F (8.2°C). Rio Grande's nighttime temperatures in December reveal a minimal variation from the daytime highs, averaging at a wintry 39.4°F (4.1°C).Humidity
In Rio Grande, the average relative humidity in December is 75%.Rainfall
In Rio Grande, in December, during 10.6 rainfall days, 3.15" (80mm) of precipitation is typically accumulated. In Rio Grande, during the entire year, the rain falls for 158 days and collects up to 35.47" (901mm) of precipitation.Snowfall
January through March and December are months with snowfall. The month with the most snowfall is December, when snow falls for 1.3 days and typically aggregates up to 1.06" (27mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of December in Rio Grande, sunrise is at 7:00 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:47 pm EST.
Sunshine
The average sunshine in December is 5.1h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 2 during December leads to these instructions:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Boost your sun resistance with garments that are densely woven yet spacious. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Rio Grande, NJ
- Average high temperature in December: 46.8°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (40.5°F).
- Average low temperature in December: 39.4°F
The month with the highest average low temperature is July (73.4°F).
The coldest month (with the lowest average low temperature) is January (32.2°F).
Average pressure in December
Rio Grande, 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
Rio Grande, NJ
- Average wind speed in December: 13mph
The windiest month (with the highest average wind speed) is January (13.5mph).
The calmest month (with the lowest average wind speed) is July (9.2mph).
Average humidity in December
Rio Grande, NJ
- Average humidity in December: 75%
The month with the highest relative humidity is May (82%).
The month with the lowest relative humidity is November (73%).
Average rainfall in December
Rio Grande, NJ
- Average rainfall in December: 3.15"
The wettest month (with the highest rainfall) is August (3.86").
The driest month (with the least rainfall) is January (2.13").
Average rainfall days in December
Rio Grande, NJ
- Average rainfall days in December: 10.6 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (8.7 days).
Average snowfall in December
Rio Grande, NJ
- Average snowfall in December: 1.06"
The month with the highest snowfall is December (1.06").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Rio Grande, NJ
- Average snowfall days in December: 1.3 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Rio Grande, NJ
- Average daylight in December: 9h and 30min
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 30min).
- Average sunshine in December: 5h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in December
Rio Grande, NJ
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is November (18.9 days).
The months with the least sunshine days are May and June (12.5 days).
Average UV index in December
Rio Grande, 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 and December (UV index 2).
Average cloud cover in December
Rio Grande, NJ
- Average cloud cover in December: 45
The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in December
Rio Grande, 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).
