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 arrival of December indicates a decrease in the average high-temperature, moving from a chilly 47.8°F (8.8°C) in November to a cold 38.8°F (3.8°C). The nighttime temperature in Glen Carbon, Pennsylvania, dips to a subzero cold 27.9°F (-2.3°C) on average during December.Humidity
In Glen Carbon, the average relative humidity in December is 81%.Rainfall
In December, the rain falls for 9.5 days. Throughout December, 1.89" (48mm) of precipitation is accumulated. Throughout the year, in Glen Carbon, there are 146 rainfall days, and 26.42" (671mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Glen Carbon. In Glen Carbon, Pennsylvania, during December, snow falls for 3.1 days and regularly aggregates up to 1.46" (37mm) of snow. Throughout the year, in Glen Carbon, there are 23 snowfall days, and 13.46" (342mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:10 am and sunset at 4:38 pm. On the last day of December, sunrise is at 7:29 am and sunset at 4:48 pm EST.
Sunshine
The average sunshine in December is 4.5h.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 reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 2 during December translates into the following directions:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Frequently asked questions
How cold is it in Glen Carbon in December?
What is the average humidity in December in Glen Carbon?
How many days does it rain in December in Glen Carbon?
How many days does it snow in December in Glen Carbon?
What is the month with the shortest days in Glen Carbon?
What is the average length of the day in December in Glen Carbon?
What time are sunrise and sunset in December in Glen Carbon?
How long on average sun shines in December in Glen Carbon?
What are the months with the lowest UV index in Glen Carbon?
What is the UV index intensity in December in Glen Carbon?
Average temperature in December
Glen Carbon, PA
- Average high temperature in December: 38.8°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (32.7°F).
- Average low temperature in December: 27.9°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in December
Glen Carbon, PA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Glen Carbon, PA
- Average wind speed in December: 7.7mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Glen Carbon, PA
- Average humidity in December: 81%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
Glen Carbon, PA
- Average rainfall in December: 1.89"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is February (1.69").
Average rainfall days in December
Glen Carbon, PA
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (5.7 days).
Average snowfall in December
Glen Carbon, PA
- Average snowfall in December: 1.46"
The month with the highest snowfall is March (3.86").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Glen Carbon, PA
- Average snowfall days in December: 3.1 days
The month with the highest number of snowfall days is February (6.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Glen Carbon, 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 18min).
- Average sunshine in December: 4h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The months with the least sunshine are January and February (Average sunshine: 4h and 24min).
Average sunshine days in December
Glen Carbon, PA
- Average sunshine days in December: 18.8 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in December
Glen Carbon, PA
- Average UV index in December: 2
The months with the highest UV index are June and July (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
Glen Carbon, PA
- Average cloud cover in December: 53
The months with the most cloud cover are February and December (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Glen Carbon, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, June, November and December (6mi).
The months with the lowest visibility are February, May, July, August, September and October (5mi).
Glen Carbon, Pennsylvania, USA
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