December weather forecastBertha, PA
December
Weather in December
The first month of the winter, December, is also a wintry month in Bertha, Pennsylvania, with an average temperature fluctuating between 39.4°F (4.1°C) and 27.9°F (-2.3°C).Temperature
Bertha, Pennsylvania, experiences a temperature shift at the start of December, with average high-temperatures adjusting from a chilly 48.9°F (9.4°C) in November to a wintry 39.4°F (4.1°C). Throughout the nights in December, an average low-temperature of 27.9°F (-2.3°C) is noted in Bertha.Humidity
In December, the average relative humidity in Bertha is 84%.Rainfall
In Bertha, in December, it is raining for 12.9 days, with typically 2.95" (75mm) of accumulated precipitation. In Bertha, Pennsylvania, during the entire year, the rain falls for 183.5 days and collects up to 34.37" (873mm) of precipitation.Snowfall
Months with snowfall in Bertha are January through May, October through December. In December, it is snowing for 13.2 days. Throughout December, 4.49" (114mm) of snow is accumulated. Throughout the year, there are 61.6 snowfall days, and 23.9" (607mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of December in Bertha, sunrise is at 7:26 am and sunset at 4:55 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 5:05 pm EST.
Sunshine
The average sunshine in December is 3.4h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.Note: In December, a regular UV index of 1 translates into these guidelines:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Bertha, PA
- Average high temperature in December: 39.4°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (33.1°F).
- Average low temperature in December: 27.9°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 (20.5°F).
Average pressure in December
Bertha, 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
Bertha, PA
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in December
Bertha, PA
- Average humidity in December: 84%
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in December
Bertha, PA
- Average rainfall in December: 2.95"
The wettest month (with the highest rainfall) is April (3.54").
The driest month (with the least rainfall) is November (2.28").
Average rainfall days in December
Bertha, PA
- Average rainfall days in December: 12.9 days
The month with the highest number of rainy days is May (20.5 days).
The month with the least rainy days is January (10.7 days).
Average snowfall in December
Bertha, PA
- Average snowfall in December: 4.49"
The month with the highest snowfall is January (6.1").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Bertha, PA
- Average snowfall days in December: 13.2 days
The month with the highest number of snowfall days is January (17.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Bertha, PA
- Average daylight in December: 9h and 18min
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 18min).
- Average sunshine in December: 3h and 24min
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
Bertha, PA
- Average sunshine days in December: 9.5 days
The month with the most sunshine days is November (15.1 days).
The month with the least sunshine days is January (7.8 days).
Average UV index in December
Bertha, 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
Bertha, PA
- Average cloud cover in December: 64
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
Bertha, 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 and February (4mi).
