December weather forecastBarnsley, PA
December
Weather in December
The first month of the winter, December, is also a frosty month in Barnsley, Pennsylvania, with an average temperature ranging between max 43.2°F (6.2°C) and min 31.3°F (-0.4°C).Temperature
December sees a slight reduction in average high-temperature, with a shift from a fresh 51.6°F (10.9°C) in November to a frosty 43.2°F (6.2°C). An average low-temperature of 31.3°F (-0.4°C) is recorded in the month of December in Barnsley.Humidity
The average relative humidity in December in Barnsley, Pennsylvania, is 79%.Rainfall
In Barnsley, in December, it is raining for 8.6 days, with typically 1.18" (30mm) of accumulated precipitation. In Barnsley, during the entire year, the rain falls for 130.4 days and collects up to 16.3" (414mm) of precipitation.Snowfall
Months with snowfall in Barnsley, Pennsylvania, are January through April, November and December. In Barnsley, Pennsylvania, in December, snow falls for 2.5 days, with typically accumulated 0.59" (15mm) of snow. Throughout the year, in Barnsley, there are 16.2 snowfall days, and 5.35" (136mm) 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 the month, sunrise is at 7:06 am and sunset at 4:39 pm. On the last day of December, sunrise is at 7:24 am and sunset at 4:49 pm EST.
Sunshine
In Barnsley, Pennsylvania, the average sunshine in December is 5h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 2 suggests this advice:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. The Sun's radiation is especially intense around midday; try to stay in shade during this period. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Barnsley, PA
- Average high temperature in December: 43.2°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (36.7°F).
- Average low temperature in December: 31.3°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure in December
Barnsley, PA
- Average pressure in December: 30.1"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
Barnsley, PA
- Average wind speed in December: 8.3mph
The windiest months (with the highest average wind speed) are January, February and March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Barnsley, PA
- Average humidity in December: 79%
The month with the highest relative humidity is May (81%).
The months with the lowest relative humidity are January, March, April and November (76%).
Average rainfall in December
Barnsley, PA
- Average rainfall in December: 1.18"
The wettest month (with the highest rainfall) is August (2.36").
The driest month (with the least rainfall) is January (0.91").
Average rainfall days in December
Barnsley, PA
- Average rainfall days in December: 8.6 days
The month with the highest number of rainy days is May (15.1 days).
The month with the least rainy days is January (6 days).
Average snowfall in December
Barnsley, PA
- Average snowfall in December: 0.59"
The month with the highest snowfall is March (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Barnsley, PA
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Barnsley, PA
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Barnsley, PA
- Average sunshine days in December: 19.6 days
The month with the most sunshine days is November (21.8 days).
The month with the least sunshine days is June (13.2 days).
Average UV index in December
Barnsley, PA
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Barnsley, PA
- Average cloud cover in December: 46
The months with the most cloud cover are February, March and May (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Barnsley, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, October, November and December (6mi).
The months with the lowest visibility are May, August and September (5mi).
