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
Transitioning from November to December involves a subtle drop in average high-temperatures, descending from a cool 50.4°F (10.2°C) to a wintry 41.5°F (5.3°C). Throughout December, Center Valley anticipates an average low-temperature of 29.8°F (-1.2°C).Humidity
In Center Valley, the average relative humidity in December is 80%.Rainfall
In December, the rain falls for 10 days. Throughout December, 2.91" (74mm) of precipitation is accumulated. In Center Valley, during the entire year, the rain falls for 154.1 days and collects up to 31.73" (806mm) of precipitation.Snowfall
Months with snowfall in Center Valley are January through May, October through December. In December, in Center Valley, it is snowing for 5 days. Throughout December, 2.87" (73mm) of snow is accumulated. In Center Valley, during the entire year, snow falls for 29.3 days and aggregates up to 16.57" (421mm) of snow.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 7:06 am and sunset at 4:35 pm. On the last day of December, in Center Valley, sunrise is at 7:24 am and sunset at 4:44 pm EST.
Sunshine
In Center Valley, the average sunshine in December is 4.8h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Center Valley. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the average person.Note: In December, the maximum UV index of 2 suggests this advice:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. It's recommended to limit sun exposure when its radiation is at its peak during midday. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
How cold is December in Center Valley?
What is the average humidity in December in Center Valley?
How much does it rain in Center Valley in December?
How many days does it snow in December in Center Valley?
What is the month with the shortest days in Center Valley?
What is the average length of the day in December in Center Valley?
When is the sunrise / sunset in December in Center Valley?
How long on average sun shines in December in Center Valley?
When is the lowest UV index in Center Valley?
What is the UV index intensity in December in Center Valley?
Average temperature in December
Center Valley, PA
- Average high temperature in December: 41.5°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (35.1°F).
- Average low temperature in December: 29.8°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).
Average pressure in December
Center Valley, PA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Center Valley, PA
- Average wind speed in December: 7.5mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Center Valley, PA
- Average humidity in December: 80%
The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are April and July (75%).
Average rainfall in December
Center Valley, PA
- Average rainfall in December: 2.91"
The wettest months (with the highest rainfall) are May and July (3.07").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in December
Center Valley, PA
- Average rainfall days in December: 10 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in December
Center Valley, PA
- Average snowfall in December: 2.87"
The month with the highest snowfall is March (4.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Center Valley, PA
- Average snowfall days in December: 5 days
The month with the highest number of snowfall days is February (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Center Valley, 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Center Valley, PA
- Average sunshine days in December: 17 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in December
Center Valley, PA
- Average UV index in December: 2
The months with the highest UV index are May, 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
Center Valley, PA
- Average cloud cover in December: 50
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
Center Valley, PA
- Average visibility in December: 5mi
The months with the highest visibility are March, April, June, July, August and November (6mi).
The months with the lowest visibility are January, February, May, September, October and December (5mi).
Center Valley, Pennsylvania, USA
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