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 move into December indicates a reduction in the average high-temperature, down from November's chilly 46.8°F (8.2°C) to a wintry 37°F (2.8°C). Throughout the month of December, Greenville witnesses an average temperature of 26.4°F (-3.1°C).Humidity
In Greenville, the average relative humidity in December is 87%.Rainfall
In Greenville, in December, it is raining for 11.9 days, with typically 1.85" (47mm) of accumulated precipitation. In Greenville, during the entire year, the rain falls for 167.1 days and collects up to 24.25" (616mm) of precipitation.Snowfall
Months with snowfall in Greenville are January through May, October through December. In Greenville, in December, during 16.5 snowfall days, 4.88" (124mm) of snow is typically accumulated. In Greenville, during the entire year, snow falls for 79.6 days and aggregates up to 25" (635mm) of snow.Daylight
The month with the shortest days in Greenville is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:28 am and sunset at 4:52 pm. On the last day of December, in Greenville, sunrise is at 7:47 am and sunset at 5:02 pm EST.
Sunshine
The average sunshine in December in Greenville is 2.8h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 1 during December translates into the following guidance:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Frequently asked questions
How cold is December in Greenville?
What is the average humidity in December in Greenville?
How many days does it rain in December in Greenville?
How many days does it snow in December in Greenville?
What is the month with the shortest days in Greenville?
What is the average length of the day in December in Greenville?
When are sunrise and sunset in December in Greenville?
How many hours of sunshine does Greenville have in December?
When is the lowest UV index in Greenville?
What is the UV index intensity in December in Greenville?
Average temperature in December
Greenville, PA
- Average high temperature in December: 37°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in December: 26.4°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in December
Greenville, PA
- Average pressure in December: 30.09"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
Greenville, PA
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest month (with the lowest average wind speed) is July (5.1mph).
Average humidity in December
Greenville, PA
- Average humidity in December: 87%
The month with the highest relative humidity is February (89%).
The months with the lowest relative humidity are May, June and July (79%).
Average rainfall in December
Greenville, PA
- Average rainfall in December: 1.85"
The wettest month (with the highest rainfall) is October (2.52").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in December
Greenville, PA
- Average rainfall days in December: 11.9 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is January (8 days).
Average snowfall in December
Greenville, PA
- Average snowfall in December: 4.88"
The month with the highest snowfall is January (6.38").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Greenville, PA
- Average snowfall days in December: 16.5 days
The month with the highest number of snowfall days is January (19.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Greenville, PA
- Average daylight in December: 9h and 1min
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 12min).
- Average sunshine in December: 2h and 5min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in December
Greenville, PA
- Average sunshine days in December: 7.5 days
The month with the most sunshine days is August (12.6 days).
The month with the least sunshine days is February (6.3 days).
Average UV index in December
Greenville, 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
Greenville, PA
- Average cloud cover in December: 71
The month with the most cloud cover is January (Cloud cover 76).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in December
Greenville, PA
- Average visibility in December: 4mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February and December (4mi).
Greenville, Pennsylvania, USA
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