December weather forecastRiverside, RI

December

Weather in December

Riverside welcomes December, marking the official start of winter, with temperatures hovering between 30.2°F (-1°C) and 40.8°F (4.9°C). Glistening snow adorns the landscapes, transforming Riverside into a winter wonderland. The festive season, coupled with frosty weather conditions, ignites a cosy, holiday spirit in the hearts of locals and visitors. Warm glowing lights scattered across the city become a beacon in the longer winter nights.

Temperature

Riverside, Rhode Island, in December demonstrates a small temperature transition, adjusting from an average high of a fresh 50.5°F (10.3°C) in November to a cold 40.8°F (4.9°C). In the month of December, Riverside witnesses a consistent average low-temperature of 30.2°F (-1°C).

Humidity

In December, the average relative humidity in Riverside is 76%.

Rainfall

In December, the rain falls for 11.3 days. Throughout December, 2.28" (58mm) of precipitation is accumulated. In Riverside, during the entire year, the rain falls for 144.3 days and collects up to 23.43" (595mm) of precipitation.

Snowfall

Months with snowfall in Riverside are January through May, November and December. In Riverside, in December, snow falls for 3.9 days, with typically accumulated 1.42" (36mm) of snow. Throughout the year, there are 22 snowfall days, and 7.83" (199mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 12min of daylight.
On the first day of December, sunrise is at 6:53 am and sunset at 4:15 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 4:24 pm EST.

Sunshine

February and December, with an average of 4.8h of sunshine, are months with the least sunshine in Riverside, Rhode Island.

UV index

The months with the lowest UV index are January through March, 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 rays for the ordinary person.
Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.

Updated: Aug 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In December, the average high-temperature and low-temperature are 40.8°F (4.9°C) and 30.2°F (-1°C) respectively. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, in July is evaluated at 86°F (30°C).

In Riverside, the average relative humidity in December is 76%.

In Riverside, in December, during 11.3 rainfall days, 2.28" (58mm) of precipitation is typically accumulated.

In Riverside, in December, during 3.9 snowfall days, 1.42" (36mm) of snow is typically accumulated.

December has the shortest days of the year, with an average of 9h and 12min of daylight.

In December, the average day length is 9h and 12min.

On the first day of December, sunrise is at 6:53 am and sunset at 4:15 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 4:24 pm EST.

The months with the least sunshine are February and December, with an average of 4.8h of sunshine.

In Riverside, the average sunshine duration in December is 4.8h.

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

50.5°F

40.8°F

35.1°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

9.6mph

9.9mph

10.5mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

18.7

16.8

17.5

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Riverside, RI

Average high temperature in December: 40.8°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (35.1°F).

Average low temperature in December: 30.2°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).

Average pressure in December
Riverside, RI

Average pressure in December: 30.04"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
Riverside, RI

Average wind speed in December: 9.3mph

The windiest months (with the highest average wind speed) are January, February and March (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

Average humidity in December
Riverside, RI

Average humidity in December: 76%

The month with the highest relative humidity is June (79%).
The month with the lowest relative humidity is April (72%).

Average rainfall in December
Riverside, RI

Average rainfall in December: 2.28"

The wettest month (with the highest rainfall) is April (2.4").
The driest month (with the least rainfall) is September (1.1").

Average rainfall days in December
Riverside, RI

Average rainfall days in December: 11.3 days

The month with the highest number of rainy days is July (15.5 days).
The month with the least rainy days is January (7.8 days).

Average snowfall in December
Riverside, RI

Average snowfall in December: 1.42"

The month with the highest snowfall is February (2.01").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in December
Riverside, RI

Average snowfall days in December: 3.9 days

The month with the highest number of snowfall days is January (5.9 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Riverside, RI

Average daylight in December: 9h and 12min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

Average sunshine in December: 4h and 48min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).

Average sunshine days in December
Riverside, RI

Average sunshine days in December: 16.8 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is April (13.2 days).

Average UV index in December
Riverside, 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, November and December (UV index 2).

Average cloud cover in December
Riverside, RI

Average cloud cover in December: 46

The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 31).

Average visibility in December
Riverside, 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).