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
Transition into December marks a drop in the average high-temperature, moving from a frosty 46.2°F (7.9°C) in November to a wintry 36.7°F (2.6°C). Somerset experiences an average low-temperature reading of 25.7°F (-3.5°C) throughout December.Humidity
In Somerset, the average relative humidity in December is 86%.Rainfall
In Somerset, in December, it is raining for 10.6 days, with typically 3.27" (83mm) of accumulated precipitation. In Somerset, during the entire year, the rain falls for 168.6 days and collects up to 34.09" (866mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Somerset, Pennsylvania, during December, snow falls for 12 days and regularly aggregates up to 5.98" (152mm) of snow. Throughout the year, there are 63.9 snowfall days, and 33.54" (852mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:19 am and sunset at 4:51 pm. On the last day of December, sunrise is at 7:38 am and sunset at 5:01 pm EST.
Sunshine
In December, the average sunshine is 3.2h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index, 1 during December, leads to the following recommendations:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December in Somerset?
How many days does it rain in December?
How much does it snow in Somerset in December?
What is the month with the shortest days?
How many hours of daylight does Somerset 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
Somerset, PA
- Average high temperature in December: 36.7°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (30.7°F).
- Average low temperature in December: 25.7°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in December
Somerset, PA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Somerset, PA
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in December
Somerset, PA
- Average humidity in December: 86%
The months with the highest relative humidity are January and February (87%).
The months with the lowest relative humidity are April and July (79%).
Average rainfall in December
Somerset, PA
- Average rainfall in December: 3.27"
The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is November (1.97").
Average rainfall days in December
Somerset, PA
- Average rainfall days in December: 10.6 days
The month with the highest number of rainy days is May (21 days).
The month with the least rainy days is February (8.1 days).
Average snowfall in December
Somerset, PA
- Average snowfall in December: 5.98"
The month with the highest snowfall is January (7.48").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Somerset, PA
- Average snowfall days in December: 12 days
The month with the highest number of snowfall days is January (15.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Somerset, 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 24min).
- Average sunshine in December: 3h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in December
Somerset, PA
- Average sunshine days in December: 10.3 days
The month with the most sunshine days is November (14.2 days).
The month with the least sunshine days is February (7.8 days).
Average UV index in December
Somerset, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Somerset, PA
- Average cloud cover in December: 70
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is August (Cloud cover 41).
Average visibility in December
Somerset, PA
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).
Somerset, Pennsylvania, USA
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