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 onset of December is marked by a decrease in temperature, transitioning from a frosty 43.7°F (6.5°C) in November to a cold 34.5°F (1.4°C). During December, the average low-temperature is recorded at a freezing cold 24.8°F (-4°C).Humidity
In Sheffield, the average relative humidity in December is 88%.Rainfall
In Sheffield, during December, the rain falls for 10.4 days and regularly aggregates up to 3.15" (80mm) of precipitation. In Sheffield, during the entire year, the rain falls for 175.4 days and collects up to 35.2" (894mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Sheffield, during December, snow falls for 20.8 days and regularly aggregates up to 12.32" (313mm) of snow. In Sheffield, during the entire year, snow falls for 101.6 days and aggregates up to 57.36" (1457mm) 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 the month, sunrise is at 7:24 am and sunset at 4:46 pm. On the last day of December, sunrise is at 7:43 am and sunset at 4:55 pm EST.
Sunshine
The average sunshine in December in Sheffield is 2.3h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In December, the maximum UV index of 1 suggests these recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Enhance your sun protection with tightly woven, yet airy clothing. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly 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 much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Sheffield have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Sheffield, PA
- Average high temperature in December: 34.5°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (28°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 (16.2°F).
Average pressure in December
Sheffield, 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
Sheffield, PA
- Average wind speed in December: 8.5mph
The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in December
Sheffield, PA
- Average humidity in December: 88%
The months with the highest relative humidity are January and February (89%).
The months with the lowest relative humidity are May and June (80%).
Average rainfall in December
Sheffield, PA
- Average rainfall in December: 3.15"
The wettest month (with the highest rainfall) is April (3.9").
The driest month (with the least rainfall) is September (2.2").
Average rainfall days in December
Sheffield, PA
- Average rainfall days in December: 10.4 days
The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in December
Sheffield, PA
- Average snowfall in December: 12.32"
The month with the highest snowfall is February (13.03").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Sheffield, PA
- Average snowfall days in December: 20.8 days
The month with the highest number of snowfall days is January (23.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Sheffield, 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 24min).
The month with the least sunshine is January (Average sunshine: 2h and 6min).
Average sunshine days in December
Sheffield, PA
- Average sunshine days in December: 5.5 days
The month with the most sunshine days is September (12.1 days).
The month with the least sunshine days is February (4.6 days).
Average UV index in December
Sheffield, 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 and December (UV index 1).
Average cloud cover in December
Sheffield, PA
- Average cloud cover in December: 78
The month with the most cloud cover is January (Cloud cover 81).
The month with the least cloud cover is July (Cloud cover 42).
Average visibility in December
Sheffield, PA
- Average visibility in December: 4mi
The months with the highest visibility are April, May, June, July, October and November (5mi).
The months with the lowest visibility are January, February, March, August, September and December (4mi).
Sheffield, Pennsylvania, USA
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