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
In Fern Glen, the beginning of December is marked by a lowered average high-temperature, shifting from November's frosty 46.9°F (8.3°C) to a cold 37.2°F (2.9°C). An average nighttime temperature of 26.2°F (-3.2°C) is recorded during December.Humidity
In December, the average relative humidity is 83%.Rainfall
In Fern Glen, in December, it is raining for 7.3 days, with typically 0.87" (22mm) of accumulated precipitation. In Fern Glen, during the entire year, the rain falls for 111.5 days and collects up to 11.34" (288mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Fern Glen, in December, snow falls for 5.3 days, with typically accumulated 1.02" (26mm) of snow. Throughout the year, in Fern Glen, there are 31.5 snowfall days, and 7.28" (185mm) of snow is accumulated.Daylight
The month with the shortest days in Fern Glen is December, with an average of 9h and 18min of daylight.On the first day of December in Fern Glen, sunrise is at 7:10 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:46 pm EST.
Sunshine
In December, the average sunshine is 3.9h.UV index
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: An average maximum UV index of 2 in December leads to these recommendations:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Fern Glen in December?
What is the average humidity in December in Fern Glen?
How much does it rain in Fern Glen in December?
How much does it snow in Fern Glen in December?
What is the month with the shortest days in Fern Glen?
What is the average length of the day in December in Fern Glen?
When is the sunrise / sunset in December in Fern Glen?
How long on average sun shines in December in Fern Glen?
What is the month with the lowest UV index in Fern Glen?
How high is the UV index in December in Fern Glen?
Average temperature in December
Fern Glen, PA
- Average high temperature in December: 37.2°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in December: 26.2°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 (18.9°F).
Average pressure in December
Fern Glen, 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
Fern Glen, PA
- Average wind speed in December: 7.8mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in December
Fern Glen, PA
- Average humidity in December: 83%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is April (78%).
Average rainfall in December
Fern Glen, PA
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is May (1.26").
The driest month (with the least rainfall) is September (0.55").
Average rainfall days in December
Fern Glen, PA
- Average rainfall days in December: 7.3 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in December
Fern Glen, PA
- Average snowfall in December: 1.02"
The month with the highest snowfall is February (1.81").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Fern Glen, PA
- Average snowfall days in December: 5.3 days
The month with the highest number of snowfall days is January (9.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Fern Glen, 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: 3h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in December
Fern Glen, PA
- Average sunshine days in December: 19 days
The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is May (14.3 days).
Average UV index in December
Fern Glen, PA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in December
Fern Glen, PA
- Average cloud cover in December: 60
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 37).
Average visibility in December
Fern Glen, 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).
Fern Glen, Pennsylvania, USA
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