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 Coopersburg, the beginning of December is marked by a marginally lowered average high-temperature, shifting from November's fresh 50.4°F (10.2°C) to a cold 41.5°F (5.3°C). An average minimum temperature of 29.8°F (-1.2°C) is recorded during the month of December.Humidity
In December, the average relative humidity is 80%.Rainfall
In December, the rain falls for 10 days. Throughout December, 2.91" (74mm) of precipitation is accumulated. In Coopersburg, during the entire year, the rain falls for 154.1 days and collects up to 31.73" (806mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Coopersburg, during December, snow falls for 5 days and regularly aggregates up to 2.87" (73mm) of snow. Throughout the year, there are 29.3 snowfall days, and 16.57" (421mm) 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 December, sunrise is at 7:06 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:44 pm EST.
Sunshine
In Coopersburg, the average sunshine in December is 4.8h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The daily maximum UV index of 2 in December interprets into the following advice:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Coopersburg have in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index in Coopersburg?
What is the UV index reading in December?
Average temperature in December
Coopersburg, PA
- Average high temperature in December: 41.5°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (35.1°F).
- Average low temperature in December: 29.8°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).
Average pressure in December
Coopersburg, 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
Coopersburg, PA
- Average wind speed in December: 7.5mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Coopersburg, PA
- Average humidity in December: 80%
The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are April and July (75%).
Average rainfall in December
Coopersburg, PA
- Average rainfall in December: 2.91"
The wettest months (with the highest rainfall) are May and July (3.07").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in December
Coopersburg, PA
- Average rainfall days in December: 10 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in December
Coopersburg, PA
- Average snowfall in December: 2.87"
The month with the highest snowfall is March (4.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Coopersburg, PA
- Average snowfall days in December: 5 days
The month with the highest number of snowfall days is February (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Coopersburg, 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 18min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Coopersburg, PA
- Average sunshine days in December: 17 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in December
Coopersburg, PA
- Average UV index in December: 2
The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Coopersburg, PA
- Average cloud cover in December: 50
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
Coopersburg, PA
- Average visibility in December: 5mi
The months with the highest visibility are March, April, June, July, August and November (6mi).
The months with the lowest visibility are January, February, May, September, October and December (5mi).
Coopersburg, Pennsylvania, USA
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