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
Clarendon's weather in December involves a decrease in the average high-temperature, moving down from November's chilly 43.9°F (6.6°C) to a cold 34.7°F (1.5°C). The nighttime temperature, during December, averages of 24.8°F (-4°C).Humidity
In December, the average relative humidity is 88%.Rainfall
In Clarendon, Pennsylvania, in December, it is raining for 10.8 days, with typically 2.4" (61mm) of accumulated precipitation. In Clarendon, during the entire year, the rain falls for 170.4 days and collects up to 27.13" (689mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. December is the month with the most snowfall. Snow falls for 18.5 days and accumulates 9.29" (236mm) of snow.Daylight
The month with the shortest days is December, 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
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 value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: During December, 1 as the daily maximum UV index converts into the following advice:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How many days does it rain in December in Clarendon?
When does it snow the most?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Clarendon have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
How high is the UV index in December?
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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