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
The transition into December is accompanied by a temperature decrease, with the average high-temperature shifting from a fresh 52°F (11.1°C) in November to a wintry 42.4°F (5.8°C). The average low-temperature during December nights is a freezing cold 31.1°F (-0.5°C).Humidity
February and December, with an average relative humidity of 81%, are the most humid months.Rainfall
In Williamstown, in December, during 11.9 rainfall days, 3.07" (78mm) of precipitation is typically accumulated. Throughout the year, in Williamstown, there are 169.6 rainfall days, and 36.02" (915mm) of precipitation is accumulated.Snowfall
Months with snowfall in Williamstown, Kentucky, are January through April, October through December. In December, it is snowing for 8.5 days. Throughout December, 2.09" (53mm) of snow is accumulated. Throughout the year, there are 37 snowfall days, and 12.87" (327mm) of snow is accumulated.Daylight
The month with the shortest days in Williamstown is December, with an average of 9h and 30min of daylight.On the first day of December, sunrise is at 7:37 am and sunset at 5:17 pm. On the last day of the month, sunrise is at 7:55 am and sunset at 5:27 pm EST.
Sunshine
The average sunshine in December is 4.2h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: A maximum UV index of 2 in December translates into the following recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Frequently asked questions
Is it cold in Williamstown during December?
What is the most humid month in Williamstown?
What is the average humidity in December in Williamstown?
How many days does it rain in December in Williamstown?
How many days does it snow in December in Williamstown?
What is the month with the shortest days in Williamstown?
How many hours of daylight does Williamstown have in December?
What time are sunrise and sunset in December in Williamstown?
How long on average sun shines in December in Williamstown?
When is the lowest UV index in Williamstown?
What is the UV index reading in December in Williamstown?
Average temperature in December
Williamstown, KY
- Average high temperature in December: 42.4°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in December: 31.1°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure in December
Williamstown, KY
- Average pressure in December: 30.13"Hg
The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Williamstown, KY
- Average wind speed in December: 7.9mph
The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).
Average humidity in December
Williamstown, KY
- Average humidity in December: 81%
The months with the highest relative humidity are February and December (81%).
The month with the lowest relative humidity is August (74%).
Average rainfall in December
Williamstown, KY
- Average rainfall in December: 3.07"
The wettest month (with the highest rainfall) is April (3.82").
The driest month (with the least rainfall) is September (2.13").
Average rainfall days in December
Williamstown, KY
- Average rainfall days in December: 11.9 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is November (10.6 days).
Average snowfall in December
Williamstown, KY
- Average snowfall in December: 2.09"
The month with the highest snowfall is February (3.35").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Williamstown, KY
- Average snowfall days in December: 8.5 days
The month with the highest number of snowfall days is January (10.3 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, KY
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 1min
The months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Williamstown, KY
- Average sunshine days in December: 12.8 days
The month with the most sunshine days is October (17 days).
The month with the least sunshine days is February (10.5 days).
Average UV index in December
Williamstown, KY
- 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, November and December (UV index 2).
Average cloud cover in December
Williamstown, KY
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Williamstown, KY
- Average visibility in December: 5mi
The months with the highest visibility are March, April, June, August, September, October and November (6mi).
The months with the lowest visibility are January, February, May, July and December (5mi).
Williamstown, Kentucky, USA
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