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
South Coatesville's December weather comes with a decrease in average high-temperatures, moving from a cool 50.9°F (10.5°C) in November to a cold 41.9°F (5.5°C). South Coatesville reports an average nighttime low-temperature of 30.6°F (-0.8°C) in December.Humidity
The average relative humidity in December in South Coatesville is 80%.Rainfall
In South Coatesville, during December, the rain falls for 8.7 days and regularly aggregates up to 1.54" (39mm) of precipitation. In South Coatesville, during the entire year, the rain falls for 138.3 days and collects up to 19.76" (502mm) of precipitation.Snowfall
Months with snowfall in South Coatesville are January through May, October through December. In South Coatesville, in December, snow falls for 2.7 days, with typically accumulated 1.14" (29mm) of snow. Throughout the year, there are 19.6 snowfall days, and 7.64" (194mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:06 am and sunset at 4:38 pm. On the last day of December, in South Coatesville, sunrise is at 7:24 am and sunset at 4:48 pm EST.
Sunshine
In December, the average sunshine is 4.7h.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 of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 2 during December leads to these instructions:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. To guard against the harmful effects of the Sun, minimize exposure during midday. 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. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Frequently asked questions
Is it cold in South Coatesville during December?
What is the average humidity in December in South Coatesville?
How many days does it rain in December in South Coatesville?
How many days does it snow in December in South Coatesville?
What is the month with the shortest days in South Coatesville?
How many hours of daylight does South Coatesville have in December?
What time are sunrise and sunset in December in South Coatesville?
How many hours of sunshine does South Coatesville have in December?
When is the lowest UV index in South Coatesville?
How high is the UV index in December in South Coatesville?
Average temperature in December
South Coatesville, PA
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in December: 30.6°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in December
South Coatesville, PA
- Average pressure in December: 30.1"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
South Coatesville, PA
- Average wind speed in December: 8.3mph
The windiest months (with the highest average wind speed) are January, February and March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
South Coatesville, PA
- Average humidity in December: 80%
The months with the highest relative humidity are May and October (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
South Coatesville, PA
- Average rainfall in December: 1.54"
The wettest month (with the highest rainfall) is August (2.72").
The driest month (with the least rainfall) is February (1.14").
Average rainfall days in December
South Coatesville, PA
- Average rainfall days in December: 8.7 days
The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is January (6.4 days).
Average snowfall in December
South Coatesville, PA
- Average snowfall in December: 1.14"
The month with the highest snowfall is March (2.32").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
South Coatesville, PA
- Average snowfall days in December: 2.7 days
The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
South Coatesville, 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: 4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
South Coatesville, PA
- Average sunshine days in December: 19.3 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is July (12.4 days).
Average UV index in December
South Coatesville, 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, March, November and December (UV index 2).
Average cloud cover in December
South Coatesville, PA
- Average cloud cover in December: 49
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
South Coatesville, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
South Coatesville, Pennsylvania, USA
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