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 moderate decline in the average high-temperature is seen during December, decreasing from a frosty 48.2°F (9°C) in November to a wintry 38.5°F (3.6°C). During December, Saint Clairsville experiences a consistent low-temperature average of 27.5°F (-2.5°C).Humidity
In Saint Clairsville, the average relative humidity in December is 81%.Rainfall
In Saint Clairsville, in December, it is raining for 7.3 days, with typically 1.14" (29mm) of accumulated precipitation. In Saint Clairsville, during the entire year, the rain falls for 126 days and collects up to 15.47" (393mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In December, it is snowing for 4.5 days. Throughout December, 1.14" (29mm) of snow is accumulated. Throughout the year, there are 28.3 snowfall days, and 9.57" (243mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:17 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 4:58 pm EST.
Sunshine
In Saint Clairsville, the average sunshine in December is 4.3h.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 hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The average daily UV index of 2 in December transforms into the following instructions:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is December cold?
What is the average humidity in December?
How many days does it rain in December in Saint Clairsville?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Saint Clairsville have in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Saint Clairsville have in December?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Saint Clairsville, PA
- Average high temperature in December: 38.5°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32.7°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in December
Saint Clairsville, PA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Saint Clairsville, PA
- Average wind speed in December: 8mph
The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in December
Saint Clairsville, PA
- Average humidity in December: 81%
The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are April and July (76%).
Average rainfall in December
Saint Clairsville, PA
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is May (1.81").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days in December
Saint Clairsville, PA
- Average rainfall days in December: 7.3 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (6 days).
Average snowfall in December
Saint Clairsville, PA
- Average snowfall in December: 1.14"
The month with the highest snowfall is January (2.76").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Saint Clairsville, PA
- Average snowfall days in December: 4.5 days
The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Saint Clairsville, PA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in December
Saint Clairsville, PA
- Average sunshine days in December: 20.2 days
The month with the most sunshine days is December (20.2 days).
The month with the least sunshine days is May (12.8 days).
Average UV index in December
Saint Clairsville, PA
- Average UV index in December: 2
The month with the highest UV index is June (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
Saint Clairsville, PA
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in December
Saint Clairsville, PA
- Average visibility in December: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
Saint Clairsville, Pennsylvania, USA
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