Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
A shift in the average high-temperature occurs in December in Smithfield, reducing from a chilly 49.5°F (9.7°C) in November to an icy 39.7°F (4.3°C). Smithfield, in December, observes a steady average low-temperature of 28.9°F (-1.7°C).Humidity
The average relative humidity in December is 77%.Rainfall
In Smithfield, during December, the rain falls for 10.1 days and regularly aggregates up to 2.24" (57mm) of precipitation. Throughout the year, in Smithfield, Rhode Island, there are 137.6 rainfall days, and 23.98" (609mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Smithfield, in December, during 4.5 snowfall days, 2.28" (58mm) of snow is typically accumulated. Throughout the year, in Smithfield, Rhode Island, there are 26.3 snowfall days, and 12.64" (321mm) of snow is accumulated.Daylight
December has the shortest days of the year in Smithfield, Rhode Island, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 6:55 am and sunset at 4:15 pm. On the last day of December, sunrise is at 7:13 am and sunset at 4:25 pm EST.
Sunshine
In December, the average sunshine in Smithfield is 4.8h.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 estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Enhance your sun protection with tightly woven, yet airy clothing. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in Smithfield in December?
What is the average humidity in December in Smithfield?
How many days does it rain in December in Smithfield?
How much does it snow in Smithfield in December?
What is the month with the shortest days in Smithfield?
How many hours of daylight does Smithfield have in December?
When is the sunrise / sunset in December in Smithfield?
How long on average sun shines in December in Smithfield?
What is the month with the lowest UV index in Smithfield?
How high is the UV index in December in Smithfield?
Average temperature in December
Smithfield, RI
- Average high temperature in December: 39.7°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in December: 28.9°F
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure in December
Smithfield, 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
Smithfield, RI
- Average wind speed in December: 8.8mph
The windiest months (with the highest average wind speed) are February and March (9.4mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in December
Smithfield, RI
- Average humidity in December: 77%
The months with the highest relative humidity are February, June, September and October (78%).
The month with the lowest relative humidity is April (71%).
Average rainfall in December
Smithfield, RI
- Average rainfall in December: 2.24"
The wettest month (with the highest rainfall) is April (2.52").
The driest month (with the least rainfall) is September (1.06").
Average rainfall days in December
Smithfield, RI
- Average rainfall days in December: 10.1 days
The month with the highest number of rainy days is June (15.1 days).
The month with the least rainy days is January (7.1 days).
Average snowfall in December
Smithfield, RI
- Average snowfall in December: 2.28"
The month with the highest snowfall is March (3.03").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Smithfield, RI
- Average snowfall days in December: 4.5 days
The month with the highest number of snowfall days is March (6.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Smithfield, RI
- Average daylight in December: 9h and 1min
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 5min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Smithfield, RI
- Average sunshine days in December: 16.7 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is April (13.6 days).
Average UV index in December
Smithfield, 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
Smithfield, RI
- Average cloud cover in December: 47
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
Smithfield, RI
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, October, November and December (6mi).
The months with the lowest visibility are June, July, August and September (5mi).
Smithfield, Rhode Island, USA
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