December weather forecastSpring Glen, PA
December
Weather in December
December, the first month of the winter in Spring Glen, is still a cold month, with an average temperature ranging between max 39.2°F (4°C) and min 28°F (-2.2°C).Temperature
The start of December involves a temperature drop, moving from a frosty 48.2°F (9°C) in November to an icy 39.2°F (4°C). During the month of December, Spring Glen anticipates a mean low-temperature of 28°F (-2.2°C).Humidity
In Spring Glen, Pennsylvania, the average relative humidity in December is 81%.Rainfall
In December, the rain falls for 5.5 days. Throughout December, 0.55" (14mm) of precipitation is accumulated. Throughout the year, there are 100.8 rainfall days, and 8.5" (216mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In Spring Glen, Pennsylvania, during December, snow falls for 4.2 days and regularly aggregates up to 0.24" (6mm) of snow. In Spring Glen, during the entire year, snow falls for 21.7 days and aggregates up to 2.48" (63mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:11 am and sunset at 4:40 pm. On the last day of December, sunrise is at 7:30 am and sunset at 4:49 pm EST.
Sunshine
In Spring Glen, the average sunshine in December is 4.3h.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 of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 2 during December leads to these advisories:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Spring Glen, PA
- Average high temperature in December: 39.2°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (32.9°F).
- Average low temperature in December: 28°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in December
Spring Glen, 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
Spring Glen, PA
- Average wind speed in December: 7.7mph
The windiest months (with the highest average wind speed) are March and April (8.5mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in December
Spring Glen, PA
- Average humidity in December: 81%
The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are March and April (77%).
Average rainfall in December
Spring Glen, PA
- Average rainfall in December: 0.55"
The wettest month (with the highest rainfall) is July (1.1").
The driest month (with the least rainfall) is September (0.35").
Average rainfall days in December
Spring Glen, PA
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is July (13.2 days).
The month with the least rainy days is January (4.5 days).
Average snowfall in December
Spring Glen, PA
- Average snowfall in December: 0.24"
The month with the highest snowfall is January (0.75").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Spring Glen, PA
- Average snowfall days in December: 4.2 days
The month with the highest number of snowfall days is January (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
Spring Glen, 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: 4h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in December
Spring Glen, PA
- Average sunshine days in December: 22.5 days
The month with the most sunshine days is November (22.8 days).
The month with the least sunshine days is July (14.6 days).
Average UV index in December
Spring Glen, 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
Spring Glen, 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
Spring Glen, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August, September and October (5mi).
