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 involves a decrease in the average high-temperature, falling from a chilly 43.9°F (6.6°C) in November to a cold 34.7°F (1.5°C). The average temperature during December nights in Clarendon is registered at a freezing cold 24.8°F (-4°C).Humidity
The average relative humidity in December in Clarendon is 88%.Rainfall
In Clarendon, in December, it is raining for 10.8 days, with typically 2.4" (61mm) of accumulated precipitation. Throughout the year, in Clarendon, there are 170.4 rainfall days, and 27.13" (689mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Clarendon, Pennsylvania. The month with the most snowfall is December, when snow falls for 18.5 days and typically aggregates up to 9.29" (236mm) of snow.Daylight
December has the shortest days of the year in Clarendon, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 7:24 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 4:55 pm EST.
Sunshine
In Clarendon, the average sunshine in December is 2.3h.UV index
January, February and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum UV index of 1 in December translates into the following recommendations:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
How cold is December in Clarendon?
What is the average humidity in December in Clarendon?
How many days does it rain in December in Clarendon?
What is the snowiest month in Clarendon?
How many days does it snow in December in Clarendon?
What is the month with the shortest days in Clarendon?
How many hours of daylight does Clarendon have in December?
When are sunrise and sunset in December in Clarendon?
How many hours of sunshine does Clarendon have in December?
What are the months with the lowest UV index in Clarendon?
What is the UV index reading in December in Clarendon?
Average temperature in December
Clarendon, PA
- Average high temperature in December: 34.7°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (28.2°F).
- Average low temperature in December: 24.8°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in December
Clarendon, PA
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Clarendon, PA
- Average wind speed in December: 8.6mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in December
Clarendon, PA
- Average humidity in December: 88%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is May (80%).
Average rainfall in December
Clarendon, PA
- Average rainfall in December: 2.4"
The wettest month (with the highest rainfall) is April (2.99").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in December
Clarendon, PA
- Average rainfall days in December: 10.8 days
The month with the highest number of rainy days is May (18.9 days).
The month with the least rainy days is January (8.1 days).
Average snowfall in December
Clarendon, PA
- Average snowfall in December: 9.29"
The month with the highest snowfall is December (9.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Clarendon, PA
- Average snowfall days in December: 18.5 days
The month with the highest number of snowfall days is January (22.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Clarendon, PA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 2h and 2min
The month with the most sunshine is July (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 6min).
Average sunshine days in December
Clarendon, PA
- Average sunshine days in December: 6.2 days
The month with the most sunshine days is September (12.5 days).
The month with the least sunshine days is January (4.3 days).
Average UV index in December
Clarendon, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in December
Clarendon, PA
- Average cloud cover in December: 77
The month with the most cloud cover is January (Cloud cover 80).
The months with the least cloud cover are July and August (Cloud cover 41).
Average visibility in December
Clarendon, PA
- Average visibility in December: 4mi
The months with the highest visibility are March, April, May, June, July, October and November (5mi).
The months with the lowest visibility are January, February, August, September and December (4mi).
Clarendon, Pennsylvania, USA
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