December weather forecastNewport, RI
December
Weather in December
December marks Newport's transition into its winter season. Average daylight hours drop to their lowest at 9.2 hours, with short daylight periods and long, chilly nights. Average snowfall increases up to 1.38" (35mm) indicating the return of the snow season. Even though temperatures drop, various winter activities become more popular during this season. With high relative humidity (75%), December’s atmospheric pressure remains fairly stable.Temperature
As December commences, the average high-temperature subtly reduces, transitioning from a fresh 51.1°F (10.6°C) in November to a cold 42.4°F (5.8°C). During the month of December, Newport's nighttime temperature lowers to an average of 33.1°F (0.6°C).Humidity
The average relative humidity in December is 75%.Rainfall
In Newport, in December, it is raining for 11.5 days, with typically 3.23" (82mm) of accumulated precipitation. In Newport, during the entire year, the rain falls for 148.1 days and collects up to 29.65" (753mm) of precipitation.Snowfall
January through March, May, November and December are months with snowfall in Newport, Rhode Island. In December, it is snowing for 3.8 days. Throughout December, 1.38" (35mm) of snow is accumulated. In Newport, during the entire year, snow falls for 22.9 days and aggregates up to 8.78" (223mm) of snow.Ocean temperature
In Newport, Rhode Island, in December, the average water temperature is 48°F (8.9°C).Note: It is risky to swim in 48°F (8.9°C). Temperatures beneath 50°F (10°C) induce rapid cold shock and hyperventilation.
Daylight
The month with the shortest days in Newport is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 6:52 am and sunset at 4:16 pm. On the last day of December, sunrise is at 7:11 am and sunset at 4:25 pm EST.
Sunshine
In Newport, the average sunshine in December is 4.9h.UV index
January through March and December, with an average maximum UV index of 2, are months with the lowest UV index in Newport, Rhode Island. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum daily UV index of 2 during December morphs into the following directions:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Newport, RI
- Average high temperature in December: 42.4°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in December: 33.1°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).
Average pressure in December
Newport, RI
- Average pressure in December: 30.03"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Newport, RI
- Average wind speed in December: 11.6mph
The windiest month (with the highest average wind speed) is January (12.1mph).
The calmest month (with the lowest average wind speed) is August (8.1mph).
Average humidity in December
Newport, RI
- Average humidity in December: 75%
The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is March (73%).
Average rainfall in December
Newport, RI
- Average rainfall in December: 3.23"
The wettest month (with the highest rainfall) is October (3.27").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in December
Newport, RI
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is April (15.6 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in December
Newport, RI
- Average snowfall in December: 1.38"
The month with the highest snowfall is February (2.76").
The months with the least snowfall are April, June, July, August, September and October (0").
Average snowfall days in December
Newport, RI
- Average snowfall days in December: 3.8 days
The month with the highest number of snowfall days is January (6.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in December
Newport, RI
- Average sea temperature in December: 48.1°F
The best month for swimming (with the highest average sea temperature) is August (69.6°F).
The coldest month (with the lowest average sea temperature) is February (38.1°F).
Average daylight in December /
Average sunshine in December
Newport, RI
- Average daylight in December: 9h and 12min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Newport, RI
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is April (12.3 days).
Average UV index in December
Newport, RI
- 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 and December (UV index 2).
Average cloud cover in December
Newport, RI
- Average cloud cover in December: 47
The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Newport, RI
- 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).
