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 implies a gentle temperature shift, with average high-temperatures reducing from November's frosty 48.7°F (9.3°C) to a wintry 39°F (3.9°C). December brings with it a nighttime average temperature of 27.9°F (-2.3°C).Humidity
In South Greensburg, the average relative humidity in December is 84%.Rainfall
In South Greensburg, in December, it is raining for 13.5 days, with typically 3.07" (78mm) of accumulated precipitation. In South Greensburg, during the entire year, the rain falls for 186 days and collects up to 34.84" (885mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in South Greensburg. In South Greensburg, in December, snow falls for 12.8 days, with typically accumulated 5.67" (144mm) of snow. Throughout the year, there are 63.3 snowfall days, and 27.44" (697mm) 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 December, sunrise is at 7:22 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 5:02 pm EST.
Sunshine
In December, the average sunshine is 3.5h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the average person.Note: In December, the maximum UV index of 1 translates into these guidelines:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Remember to consider! The UV radiation from the Sun can be intensified nearly twice 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?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does South Greensburg have in December?
When are sunrise and sunset in December?
How long on average sun shines in December in South Greensburg?
When is the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
South Greensburg, PA
- Average high temperature in December: 39°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (32.9°F).
- Average low temperature in December: 27.9°F
The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in December
South Greensburg, PA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
South Greensburg, PA
- Average wind speed in December: 7.9mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
South Greensburg, PA
- Average humidity in December: 84%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in December
South Greensburg, PA
- Average rainfall in December: 3.07"
The wettest month (with the highest rainfall) is May (3.74").
The driest month (with the least rainfall) is November (2.01").
Average rainfall days in December
South Greensburg, PA
- Average rainfall days in December: 13.5 days
The month with the highest number of rainy days is May (20.9 days).
The month with the least rainy days is January (9.8 days).
Average snowfall in December
South Greensburg, PA
- Average snowfall in December: 5.67"
The month with the highest snowfall is January (6.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
South Greensburg, PA
- Average snowfall days in December: 12.8 days
The month with the highest number of snowfall days is January (17.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
South Greensburg, 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 3min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in December
South Greensburg, PA
- Average sunshine days in December: 8.8 days
The month with the most sunshine days is November (13.5 days).
The month with the least sunshine days is January (6.4 days).
Average UV index in December
South Greensburg, PA
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
South Greensburg, PA
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
South Greensburg, 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).
South Greensburg, Pennsylvania, USA
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