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
December involves a decrease in temperature, down from a frosty 47.7°F (8.7°C) in November to a cold 38.1°F (3.4°C). The average nighttime temperature lowers to a freezing cold 26.4°F (-3.1°C) throughout December.Humidity
The average relative humidity in December is 86%.Rainfall
In New Castle, in December, it is raining for 12 days, with typically 2.68" (68mm) of accumulated precipitation. In New Castle, during the entire year, the rain falls for 177.6 days and collects up to 34.92" (887mm) of precipitation.Snowfall
Months with snowfall in New Castle are January through May, October through December. In New Castle, during December, snow falls for 14.3 days and regularly aggregates up to 4.69" (119mm) of snow. Throughout the year, in New Castle, there are 68.2 snowfall days, and 25.2" (640mm) of snow is accumulated.Daylight
December has the shortest days of the year in New Castle, Pennsylvania, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:27 am and sunset at 4:53 pm. On the last day of December, sunrise is at 7:46 am and sunset at 5:03 pm EST.
Sunshine
The average sunshine in December is 3h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: The maximum UV index of 1 during December translates into these guidelines:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Frequently asked questions
How cold is it in New Castle in December?
What is the average humidity in December in New Castle?
How much does it rain in New Castle in December?
How much does it snow in New Castle in December?
What is the month with the shortest days in New Castle?
What is the average length of the day in December in New Castle?
What time are sunrise and sunset in December in New Castle?
How long on average sun shines in December in New Castle?
What is the month with the lowest UV index in New Castle?
How high is the UV index in December in New Castle?
Average temperature in December
New Castle, PA
- Average high temperature in December: 38.1°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in December: 26.4°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in December
New Castle, PA
- Average pressure in December: 30.1"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
New Castle, PA
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest month (with the lowest average wind speed) is July (5.1mph).
Average humidity in December
New Castle, PA
- Average humidity in December: 86%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April, May, June, July and August (78%).
Average rainfall in December
New Castle, PA
- Average rainfall in December: 2.68"
The wettest month (with the highest rainfall) is June (3.66").
The driest month (with the least rainfall) is November (2.24").
Average rainfall days in December
New Castle, PA
- Average rainfall days in December: 12 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (8.8 days).
Average snowfall in December
New Castle, PA
- Average snowfall in December: 4.69"
The month with the highest snowfall is January (6.93").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
New Castle, PA
- Average snowfall days in December: 14.3 days
The month with the highest number of snowfall days is January (18.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
New Castle, 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 0min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in December
New Castle, PA
- Average sunshine days in December: 9.4 days
The month with the most sunshine days is November (13.5 days).
The month with the least sunshine days is February (7 days).
Average UV index in December
New Castle, 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
New Castle, PA
- Average cloud cover in December: 68
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in December
New Castle, PA
- Average visibility in December: 4mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February and December (4mi).
New Castle, Pennsylvania, USA
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