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
During the shift to December, a minor reduction in average high-temperature is observed, shifting from a mild 57°F (13.9°C) in November to a fresh 50°F (10°C). During December nights, Williamstown records an average temperature of 35.4°F (1.9°C).Humidity
December is the most humid month, with an average relative humidity of 81%.Rainfall
The month with the most rainfall is December, when the rain falls for 14.5 days and typically aggregates up to 4.8" (122mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Williamstown, during December, snow falls for 2.5 days and regularly aggregates up to 1.26" (32mm) of snow. Throughout the year, there are 14.7 snowfall days, and 6.38" (162mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 54min of daylight.On the first day of the month, sunrise is at 7:27 am and sunset at 5:25 pm. On the last day of December, sunrise is at 7:45 am and sunset at 5:36 pm EST.
Sunshine
With an average of 5h of sunshine, December has the least sunshine of the year in Williamstown.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index of 2 during December leads to these instructions:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Around midday, solar radiation is most harmful; hence, exposure should be limited. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures?
What is the most humid month?
What is the average humidity in December?
What is the wettest month?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Williamstown have in December?
What time are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Williamstown have in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Williamstown, GA
- Average high temperature in December: 50°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (45.1°F).
- Average low temperature in December: 35.4°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).
Average pressure in December
Williamstown, GA
- Average pressure in December: 30.15"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in December
Williamstown, GA
- Average wind speed in December: 5.8mph
The windiest month (with the highest average wind speed) is February (6.5mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in December
Williamstown, GA
- Average humidity in December: 81%
The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are October and November (76%).
Average rainfall in December
Williamstown, GA
- Average rainfall in December: 4.8"
The wettest month (with the highest rainfall) is December (4.8").
The driest month (with the least rainfall) is September (2.91").
Average rainfall days in December
Williamstown, GA
- Average rainfall days in December: 14.5 days
The months with the highest number of rainy days are June and July (19.8 days).
The month with the least rainy days is November (11.3 days).
Average snowfall in December
Williamstown, GA
- Average snowfall in December: 1.26"
The month with the highest snowfall is February (2.13").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Williamstown, GA
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is January (4.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Williamstown, GA
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in December
Williamstown, GA
- Average sunshine days in December: 14.6 days
The month with the most sunshine days is October (17.4 days).
The month with the least sunshine days is June (8 days).
Average UV index in December
Williamstown, GA
- Average UV index in December: 2
The months with the highest UV index are May, 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
Williamstown, GA
- Average cloud cover in December: 49
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 32).
Average visibility in December
Williamstown, GA
- Average visibility in December: 5mi
The month with the highest visibility is June (6mi).
The months with the lowest visibility are January, February, March, April, May, July, August, September, October, November and December (5mi).
Williamstown, Georgia, USA
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