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 December, the meteorological conditions change slightly, with the average high-temperature moving from a cool 52.7°F (11.5°C) in November to a chilly 44.1°F (6.7°C). Rose Valley experiences a mean low-temperature of 32.9°F (0.5°C) during December.Humidity
The months with the highest humidity in Rose Valley are February, October and December, with an average relative humidity of 77%.Rainfall
In Rose Valley, in December, it is raining for 8.7 days, with typically 2.32" (59mm) of accumulated precipitation. Throughout the year, in Rose Valley, there are 148.4 rainfall days, and 25.94" (659mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, November and December. In Rose Valley, in December, during 1.5 snowfall days, 0.91" (23mm) of snow is typically accumulated. Throughout the year, in Rose Valley, there are 12.6 snowfall days, and 7.28" (185mm) of snow is accumulated.Daylight
December has the shortest days of the year in Rose Valley, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:04 am and sunset at 4:37 pm. On the last day of December, in Rose Valley, sunrise is at 7:22 am and sunset at 4:46 pm EST.
Sunshine
In December, the average sunshine in Rose Valley is 5.1h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Rose Valley. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Frequently asked questions
How cold is December in Rose Valley?
What are the most humid months in Rose Valley?
What is the average humidity in December in Rose Valley?
How many days does it rain in December in Rose Valley?
How many days does it snow in December in Rose Valley?
What is the month with the shortest days in Rose Valley?
How many hours of daylight does Rose Valley have in December?
When is the sunrise / sunset in December in Rose Valley?
How many hours of sunshine does Rose Valley have in December?
When is the lowest UV index in Rose Valley?
How high is the UV index in December in Rose Valley?
Average temperature in December
Rose Valley, PA
- Average high temperature in December: 44.1°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.4°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure in December
Rose Valley, PA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Rose Valley, PA
- Average wind speed in December: 7.9mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in December
Rose Valley, PA
- Average humidity in December: 77%
The months with the highest relative humidity are February, October and December (77%).
The month with the lowest relative humidity is April (71%).
Average rainfall in December
Rose Valley, PA
- Average rainfall in December: 2.32"
The wettest month (with the highest rainfall) is August (3.11").
The driest month (with the least rainfall) is January (1.61").
Average rainfall days in December
Rose Valley, PA
- Average rainfall days in December: 8.7 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is January (7.1 days).
Average snowfall in December
Rose Valley, PA
- Average snowfall in December: 0.91"
The month with the highest snowfall is March (2.32").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Rose Valley, PA
- Average snowfall days in December: 1.5 days
The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Rose Valley, PA
- Average daylight in December: 9h and 2min
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 24min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in December
Rose Valley, PA
- Average sunshine days in December: 20.5 days
The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in December
Rose Valley, 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
Rose Valley, PA
- Average cloud cover in December: 45
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in December
Rose Valley, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Rose Valley, Pennsylvania, USA
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