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 alter, with the average high-temperature shifting from a chilly 46.2°F (7.9°C) in November to a wintry 36.9°F (2.7°C). In the month of December, an average of 26.2°F (-3.2°C) marks the low-temperature.Humidity
The months with the highest humidity in Castle Rocks are February and December, with an average relative humidity of 84%.Rainfall
In December, the rain falls for 15 days. Throughout December, 2.72" (69mm) of precipitation is accumulated. In Castle Rocks, Pennsylvania, during the entire year, the rain falls for 181 days and collects up to 33.07" (840mm) of precipitation.Snowfall
Months with snowfall in Castle Rocks, Pennsylvania, are January through May, October through December. In Castle Rocks, in December, during 11 snowfall days, 4.61" (117mm) of snow is typically accumulated. Throughout the year, in Castle Rocks, there are 55.8 snowfall days, and 25.63" (651mm) 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 the month, sunrise is at 7:15 am and sunset at 4:41 pm. On the last day of December, in Castle Rocks, sunrise is at 7:34 am and sunset at 4:50 pm EST.
Sunshine
In Castle Rocks, the average sunshine in December is 3.7h.UV index
December is the month with the lowest UV index in Castle Rocks, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: A daily maximum UV index of 1 in December translates into the following instructions:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Frequently asked questions
How cold is December in Castle Rocks?
What is the most humid month in Castle Rocks?
What is the average humidity in December in Castle Rocks?
How much does it rain in Castle Rocks in December?
How much does it snow in Castle Rocks in December?
What is the month with the shortest days in Castle Rocks?
What is the average length of the day in December in Castle Rocks?
What time are sunrise and sunset in December in Castle Rocks?
How long on average sun shines in December in Castle Rocks?
What is the month with the lowest UV index in Castle Rocks?
What is the UV index intensity in December in Castle Rocks?
Average temperature in December
Castle Rocks, PA
- Average high temperature in December: 36.9°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (30.7°F).
- Average low temperature in December: 26.2°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in December
Castle Rocks, 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
Castle Rocks, PA
- Average wind speed in December: 7mph
The windiest months (with the highest average wind speed) are January and April (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Castle Rocks, PA
- Average humidity in December: 84%
The months with the highest relative humidity are February and December (84%).
The months with the lowest relative humidity are April and July (77%).
Average rainfall in December
Castle Rocks, PA
- Average rainfall in December: 2.72"
The wettest month (with the highest rainfall) is April (3.58").
The driest month (with the least rainfall) is November (2.17").
Average rainfall days in December
Castle Rocks, PA
- Average rainfall days in December: 15 days
The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is January (10.8 days).
Average snowfall in December
Castle Rocks, PA
- Average snowfall in December: 4.61"
The month with the highest snowfall is February (7.05").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Castle Rocks, PA
- Average snowfall days in December: 11 days
The month with the highest number of snowfall days is January (15.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Castle Rocks, 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 4min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Castle Rocks, PA
- Average sunshine days in December: 9.9 days
The month with the most sunshine days is September (15 days).
The month with the least sunshine days is February (8.5 days).
Average UV index in December
Castle Rocks, PA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Castle Rocks, PA
- Average cloud cover in December: 61
The months with the most cloud cover are January, February and December (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in December
Castle Rocks, PA
- Average visibility in December: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).
Castle Rocks, Pennsylvania, USA
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