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
December shows a mild decline in the average high-temperature, falling from November's chilly 47.3°F (8.5°C) to an icy 37.4°F (3°C). During the month of December, Clark's nighttime temperature lowers to an average of 26.6°F (-3°C).Humidity
In December, the average relative humidity is 86%.Rainfall
In Clark, in December, it is raining for 8.2 days, with typically 0.94" (24mm) of accumulated precipitation. In Clark, during the entire year, the rain falls for 134.4 days and collects up to 13.94" (354mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. In Clark, in December, snow falls for 7.9 days, with typically accumulated 0.87" (22mm) of snow. In Clark, during the entire year, snow falls for 46.6 days and aggregates up to 7.44" (189mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:28 am and sunset at 4:53 pm. On the last day of December, sunrise is at 7:47 am and sunset at 5:02 pm EST.
Sunshine
The average sunshine in December is 2.9h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 1 during December leads to these advisories:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
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?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day 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?
What is the UV index reading in December?
Average temperature in December
Clark, PA
- Average high temperature in December: 37.4°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.9°F).
- Average low temperature in December: 26.6°F
The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in December
Clark, 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
Clark, PA
- Average wind speed in December: 7.5mph
The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest month (with the lowest average wind speed) is July (5mph).
Average humidity in December
Clark, PA
- Average humidity in December: 86%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is May (78%).
Average rainfall in December
Clark, PA
- Average rainfall in December: 0.94"
The wettest month (with the highest rainfall) is July (1.81").
The driest months (with the least rainfall) are September and November (0.83").
Average rainfall days in December
Clark, PA
- Average rainfall days in December: 8.2 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in December
Clark, PA
- Average snowfall in December: 0.87"
The month with the highest snowfall is January (2.05").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Clark, PA
- Average snowfall days in December: 7.9 days
The month with the highest number of snowfall days is February (12.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Clark, PA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 2h and 5min
The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in December
Clark, PA
- Average sunshine days in December: 17 days
The month with the most sunshine days is November (19 days).
The months with the least sunshine days are February and May (11.8 days).
Average UV index in December
Clark, PA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Clark, PA
- Average cloud cover in December: 69
The month with the most cloud cover is January (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 36).
Average visibility in December
Clark, PA
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January and February (4mi).
Clark, Pennsylvania, USA
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