December weather forecast
Coatesville, PA

Weather in December

The first month of the winter, December, is still a cold month in Coatesville, Pennsylvania, with an average temperature varying between 30.6°F (-0.8°C) and 41.9°F (5.5°C).

Temperature

In December, the average high-temperature drops from a fresh 50.9°F (10.5°C) in November to a wintry 41.9°F (5.5°C). In December, the average low-temperature is 30.6°F (-0.8°C).

Humidity

In Coatesville, the average relative humidity in December is 80%.

Rainfall

In December, the rain falls for 8.7 days. Throughout December, 1.54" (39mm) of precipitation is accumulated. Throughout the year, there are 138.3 rainfall days, and 19.76" (502mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Coatesville are January through May, October through December. In Coatesville, snow falls for 2.7 days, with typically accumulated 1.14" (29mm) of snow. In Coatesville, Pennsylvania, during the entire year, snow falls for 19.6 days and aggregates up to 7.64" (194mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 23min of daylight.
On the first day of the month, sunrise is at 7:05 am and sunset at 4:38 pm. On the last day of December, sunrise is at 7:24 am and sunset at 4:47 pm EST.

Sunshine

The average sunshine in December in Coatesville is 4.7h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Coatesville. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: The average daily UV index of 2 in December transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
[Resources]

FAQ

What is the average humidity in December in Coatesville?

In Coatesville, the average relative humidity in December is 80%.

How much does it rain in Coatesville in December?

In December, the rain falls for 8.7 days. Throughout December, 1.54" (39mm) of precipitation is accumulated.

How many days does it snow in December in Coatesville?

In Coatesville, in December, during 2.7 snowfall days, 1.14" (29mm) of snow is typically accumulated.

What is the month with the shortest days in Coatesville?

With an average of 9h and 23min of daylight, December has the shortest days of the year.

What is the average length of the day in December in Coatesville?

The average day length in December is 9h and 23min.

When are sunrise and sunset in December in Coatesville?

In December, on the first day of the month, sunrise is at 7:05 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:47 pm EST.

How long on average sun shines in December in Coatesville?

In December, the average sunshine duration in Coatesville, Pennsylvania, is 4.7h.

What is the month with the lowest UV index in Coatesville?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Coatesville.

How high is the UV index in December in Coatesville?

In Coatesville, Pennsylvania, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Coatesville, PA

Average temperature in December - 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).

[Resources]

Average pressure in December
Coatesville, PA

Average pressure in December - 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).

[Resources]

Average wind speed in December
Coatesville, PA

Average wind speed in December - 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).

[Resources]

Average humidity in December
Coatesville, PA

Average humidity in December - 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%).

[Resources]

Average rainfall in December
Coatesville, PA

Average rainfall in December - 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").

[Resources]

Average rainfall days in December
Coatesville, PA

Average rainfall days in December - 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).

[Resources]

Average snowfall in December
Coatesville, PA

Average snowfall in December - 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").

[Resources]

Average snowfall days in December
Coatesville, PA

Average snowfall days in December - 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).

[Resources]

Average daylight in December /
Average sunshine in December
Coatesville, PA

Average daylight in December / Average sunshine in December - Coatesville, PA
  • Average daylight in December: 9h and 23min

The month with the longest days is June (Average daylight: 14h and 58min).
The month with the shortest days is December (Average daylight: 9h and 23min).

  • Average sunshine in December: 4h and 42min

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).

[Resources]

Average sunshine days in December
Coatesville, PA

Average sunshine days in December - 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).

[Resources]

Average UV index in December
Coatesville, PA

Average UV index in December - 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).

[Resources]

Average cloud cover in December
Coatesville, PA

Average cloud cover in December - 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).

[Resources]

Average visibility in December
Coatesville, PA

Average visibility in December - 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).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location