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's onset brings a negligible change in high-temperatures, falling from a cool 52.7°F (11.5°C) in November to a frosty 44.1°F (6.7°C). In December, in Colwyn, the average low-temperature is a wintry 32.7°F (0.4°C).Humidity
February, October and December, with an average relative humidity of 77%, are the most humid months.Rainfall
In December, the rain falls for 9.6 days. Throughout December, 2.4" (61mm) of precipitation is accumulated. Throughout the year, there are 142 rainfall days, and 24.41" (620mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In Colwyn, in December, snow falls for 1.5 days, with typically accumulated 0.75" (19mm) of snow. Throughout the year, in Colwyn, there are 11.3 snowfall days, and 6.18" (157mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year in Colwyn, Pennsylvania.On the first day of the month, sunrise is at 7:04 am and sunset at 4:36 pm. On the last day of December, in Colwyn, sunrise is at 7:22 am and sunset at 4:46 pm EST.
Sunshine
In Colwyn, Pennsylvania, the average sunshine in December 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 Colwyn, Pennsylvania. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high UV index of 2 in December translates into the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
How cold is December in Colwyn?
What is the most humid month in Colwyn?
What is the average humidity in December in Colwyn?
How much does it rain in Colwyn in December?
How much does it snow in Colwyn in December?
What is the month with the shortest days in Colwyn?
What is the average length of the day in December in Colwyn?
What time are sunrise and sunset in December in Colwyn?
How many hours of sunshine does Colwyn have in December?
When is the lowest UV index in Colwyn?
How high is the UV index in December in Colwyn?
Average temperature in December
Colwyn, PA
- Average high temperature in December: 44.1°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (37.4°F).
- Average low temperature in December: 32.7°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure in December
Colwyn, 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
Colwyn, PA
- Average wind speed in December: 7.8mph
The windiest months (with the highest average wind speed) are February, March and April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in December
Colwyn, 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
Colwyn, PA
- Average rainfall in December: 2.4"
The wettest month (with the highest rainfall) is August (2.95").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in December
Colwyn, PA
- Average rainfall days in December: 9.6 days
The month with the highest number of rainy days is July (16.9 days).
The month with the least rainy days is January (6.6 days).
Average snowfall in December
Colwyn, PA
- Average snowfall in December: 0.75"
The month with the highest snowfall is March (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Colwyn, PA
- Average snowfall days in December: 1.5 days
The month with the highest number of snowfall days is January (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Colwyn, 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
Colwyn, PA
- Average sunshine days in December: 19.7 days
The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is July (12.1 days).
Average UV index in December
Colwyn, 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
Colwyn, PA
- Average cloud cover in December: 46
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
Colwyn, 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).
Colwyn, Pennsylvania, USA
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