December weather forecastBelfast Junction, PA
December
Weather in December
The first month of the winter, December, is also a wintry month in Belfast Junction, Pennsylvania, with an average temperature varying between 39°F (3.9°C) and 27.5°F (-2.5°C).Temperature
Stepping into December, Belfast Junction observes a temperature decline, with the average high falling from November's chilly 48.4°F (9.1°C) to a wintry 39°F (3.9°C). During the nights in December, Belfast Junction experiences a consistent average temperature of 27.5°F (-2.5°C).Humidity
In Belfast Junction, the average relative humidity in December is 81%.Rainfall
In Belfast Junction, during December, the rain falls for 9.4 days and regularly aggregates up to 1.73" (44mm) of precipitation. Throughout the year, in Belfast Junction, Pennsylvania, there are 139.9 rainfall days, and 19.88" (505mm) of precipitation is accumulated.Snowfall
Months with snowfall in Belfast Junction, Pennsylvania, are January through May, October through December. In December, it is snowing for 4.1 days. Throughout December, 2.32" (59mm) of snow is accumulated. Throughout the year, in Belfast Junction, there are 24.7 snowfall days, and 10.94" (278mm) of snow is accumulated.Daylight
December has the shortest days of the year in Belfast Junction, Pennsylvania, with an average of 9h and 18min of daylight.On the first day of December in Belfast Junction, sunrise is at 7:06 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:43 pm EST.
Sunshine
The average sunshine in December is 4.7h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index in Belfast Junction. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: An average UV index of 1 in December transforms into this advice:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Belfast Junction, PA
- Average high temperature in December: 39°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in December
Belfast Junction, 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
Belfast Junction, PA
- Average wind speed in December: 7.5mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in December
Belfast Junction, PA
- Average humidity in December: 81%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Belfast Junction, PA
- Average rainfall in December: 1.73"
The wettest month (with the highest rainfall) is July (2.32").
The driest month (with the least rainfall) is September (1.02").
Average rainfall days in December
Belfast Junction, PA
- Average rainfall days in December: 9.4 days
The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in December
Belfast Junction, PA
- Average snowfall in December: 2.32"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Belfast Junction, PA
- Average snowfall days in December: 4.1 days
The month with the highest number of snowfall days is February (6.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Belfast Junction, PA
- Average daylight in December: 9h and 18min
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 42min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Belfast Junction, PA
- Average sunshine days in December: 17.9 days
The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is July (13 days).
Average UV index in December
Belfast Junction, PA
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Belfast Junction, PA
- Average cloud cover in December: 50
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in December
Belfast Junction, PA
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
