December weather forecastHarris, RI
December
Weather in December
The first month of the winter, December, is still a cold month in Harris, Rhode Island, with an average temperature fluctuating between 40.8°F (4.9°C) and 30.7°F (-0.7°C).Temperature
Harris observes a minor decrease in the average high-temperature with the arrival of December, falling from November's cool 50.4°F (10.2°C) to a wintry 40.8°F (4.9°C). Harris encounters an average low-temperature of 30.7°F (-0.7°C) during December nights.Humidity
In December, the average relative humidity is 76%.Rainfall
In Harris, during December, the rain falls for 10.2 days and regularly aggregates up to 1.81" (46mm) of precipitation. Throughout the year, there are 135.6 rainfall days, and 20.39" (518mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, November and December. In Harris, during December, snow falls for 4 days and regularly aggregates up to 1.06" (27mm) of snow. In Harris, during the entire year, snow falls for 21.2 days and aggregates up to 6.46" (164mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 6:54 am and sunset at 4:16 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 4:25 pm EST.
Sunshine
The months with the least sunshine in Harris are February and December, with an average of 4.8h of sunshine.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 of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the maximum UV index of 2 suggests this advice:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. It's recommended to limit sun exposure when its radiation is at its peak during midday. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Harris, RI
- Average high temperature in December: 40.8°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in December: 30.7°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (24.1°F).
Average pressure in December
Harris, 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
Harris, RI
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity in December
Harris, 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
Harris, RI
- Average rainfall in December: 1.81"
The wettest month (with the highest rainfall) is April (2.17").
The driest month (with the least rainfall) is September (0.94").
Average rainfall days in December
Harris, RI
- Average rainfall days in December: 10.2 days
The month with the highest number of rainy days is July (15.2 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in December
Harris, RI
- Average snowfall in December: 1.06"
The month with the highest snowfall is March (1.89").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Harris, RI
- Average snowfall days in December: 4 days
The month with the highest number of snowfall days is January (6 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
Harris, 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
Harris, RI
- Average sunshine days in December: 17.6 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is June (12.9 days).
Average UV index in December
Harris, 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
Harris, 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 30).
Average visibility in December
Harris, 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).
