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
A moderate decline in the average high-temperature is seen during December, decreasing from a chilly 45.1°F (7.3°C) in November to a wintry 35.2°F (1.8°C). During the nights in December, Colley observes an average low-temperature of 25.7°F (-3.5°C).Humidity
In December, the average relative humidity is 84%.Rainfall
In Colley, during December, the rain falls for 12 days and regularly aggregates up to 2.13" (54mm) of precipitation. In Colley, during the entire year, the rain falls for 169.1 days and collects up to 28.74" (730mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Colley, during December, snow falls for 13 days and regularly aggregates up to 4.53" (115mm) of snow. In Colley, during the entire year, snow falls for 68.3 days and aggregates up to 26.65" (677mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of December in Colley, sunrise is at 7:12 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 4:45 pm EST.
Sunshine
The average sunshine in December in Colley, Pennsylvania, is 3.3h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the average person.Note: A typical high UV index of 1 in December suggests the following recommendations:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Frequently asked questions
How cold is it in Colley in December?
What is the average humidity in December in Colley?
How much does it rain in Colley in December?
How much does it snow in Colley in December?
What is the month with the shortest days in Colley?
What is the average length of the day in December in Colley?
When are sunrise and sunset in December in Colley?
How long on average sun shines in December in Colley?
What is the month with the lowest UV index in Colley?
What is the UV index reading in December in Colley?
Average temperature in December
Colley, PA
- Average high temperature in December: 35.2°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (29.1°F).
- Average low temperature in December: 25.7°F
The month with the highest average low temperature is July (57.6°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in December
Colley, 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
Colley, PA
- Average wind speed in December: 8.2mph
The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Colley, PA
- Average humidity in December: 84%
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April and July (78%).
Average rainfall in December
Colley, PA
- Average rainfall in December: 2.13"
The wettest month (with the highest rainfall) is April (2.83").
The driest month (with the least rainfall) is November (1.85").
Average rainfall days in December
Colley, PA
- Average rainfall days in December: 12 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is January (8.5 days).
Average snowfall in December
Colley, PA
- Average snowfall in December: 4.53"
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
Colley, PA
- Average snowfall days in December: 13 days
The month with the highest number of snowfall days is January (16.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Colley, PA
- Average daylight in December: 9h and 1min
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 12min).
- Average sunshine in December: 3h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 12min).
Average sunshine days in December
Colley, PA
- Average sunshine days in December: 9.4 days
The month with the most sunshine days is September (14.1 days).
The month with the least sunshine days is February (7.8 days).
Average UV index in December
Colley, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Colley, PA
- Average cloud cover in December: 67
The months with the most cloud cover are January, February and December (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 39).
Average visibility in December
Colley, PA
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Colley, Pennsylvania, USA
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