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 brings a minor decrease, with the average high-temperature reducing from a chilly 47.3°F (8.5°C) in November to an icy 37.9°F (3.3°C). Hills Terrace, during the month of December, experiences an average low-temperature of 27.5°F (-2.5°C).Humidity
In Hills Terrace, the average relative humidity in December is 82%.Rainfall
In Hills Terrace, in December, during 8.9 rainfall days, 1.85" (47mm) of precipitation is typically accumulated. Throughout the year, in Hills Terrace, there are 139.8 rainfall days, and 24.69" (627mm) of precipitation is accumulated.Snowfall
Months with snowfall in Hills Terrace are January through May, October through December. In Hills Terrace, in December, during 4.9 snowfall days, 2.83" (72mm) of snow is typically accumulated. Throughout the year, in Hills Terrace, there are 33.6 snowfall days, and 20.67" (525mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:10 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:47 pm EST.
Sunshine
In Hills Terrace, the average sunshine in December is 4.4h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: An average maximum UV index of 2 in December leads to these recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get 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?
How many hours of daylight does Hills Terrace have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Hills Terrace have in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Hills Terrace, PA
- Average high temperature in December: 37.9°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (31.6°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
Hills Terrace, PA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Hills Terrace, PA
- Average wind speed in December: 7.7mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Hills Terrace, PA
- Average humidity in December: 82%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
Hills Terrace, PA
- Average rainfall in December: 1.85"
The wettest month (with the highest rainfall) is May (2.72").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in December
Hills Terrace, PA
- Average rainfall days in December: 8.9 days
The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in December
Hills Terrace, PA
- Average snowfall in December: 2.83"
The month with the highest snowfall is March (4.96").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Hills Terrace, PA
- Average snowfall days in December: 4.9 days
The month with the highest number of snowfall days is February (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Hills Terrace, 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: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 18min).
Average sunshine days in December
Hills Terrace, PA
- Average sunshine days in December: 18.5 days
The months with the most sunshine days are January and November (19.6 days).
The month with the least sunshine days is May (11.2 days).
Average UV index in December
Hills Terrace, PA
- Average UV index in December: 2
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Hills Terrace, PA
- Average cloud cover in December: 54
The months with the most cloud cover are February and December (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
Hills Terrace, PA
- Average visibility in December: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
Hills Terrace, Pennsylvania, USA
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