December weather forecast
Wescosville, PA

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Weather in December

December, the first month of the winter in Wescosville, is also an icy month, with an average temperature fluctuating between 40.3°F (4.6°C) and 28.9°F (-1.7°C).

Temperature

The shift to December brings a decrease in the average high-temperature, falling from a cool 50°F (10°C) in November to a wintry 40.3°F (4.6°C). During the month of December, Wescosville's nighttime temperature lowers to an average of 28.9°F (-1.7°C).

Humidity

In December, the average relative humidity is 80%.

Rainfall

In Wescosville, in December, during 11.2 rainfall days, 2.68" (68mm) of precipitation is typically accumulated. In Wescosville, during the entire year, the rain falls for 155.8 days and collects up to 30.75" (781mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In December, it is snowing for 5 days. Throughout December, 2.36" (60mm) of snow is accumulated. In Wescosville, during the entire year, snow falls for 29.4 days and aggregates up to 15.87" (403mm) of snow.

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:07 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:45 pm EST.

Sunshine

In December, the average sunshine 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 Wescosville, Pennsylvania. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index of 2 during December leads to these instructions:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.

Frequently asked questions

Is December cold?

In Wescosville, in December, the average high-temperature is 40.3°F (4.6°C), and the average low-temperature is 28.9°F (-1.7°C). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is evaluated at 86°F (30°C).

What is the average humidity in December?

In December, the average relative humidity is 80%.

How many days does it rain in December?

In Wescosville, in December, during 11.2 rainfall days, 2.68" (68mm) of precipitation is typically accumulated.

How much does it snow in December?

In Wescosville, in December, during 5 snowfall days, 2.36" (60mm) of snow is typically accumulated.

What is the month with the shortest days?

With an average of 9h and 18min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

In December, the average day length is 9h and 20min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:07 am and sunset at 4:35 pm. On the last day of the month, in Wescosville, sunrise is at 7:25 am and sunset at 4:45 pm EST.

How long on average sun shines in December?

In December, the average sunshine duration is 4.7h.

When is the lowest UV index?

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

How high is the UV index in December in Wescosville?

The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to Sun's UV rays.
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
Wescosville, PA

Average temperature in December - Wescosville, PA
  • Average high temperature in December: 40.3°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (34.3°F).

  • Average low temperature in December: 28.9°F

The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

Average pressure in December
Wescosville, PA

Average pressure in December - Wescosville, 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
Wescosville, PA

Average wind speed in December - Wescosville, PA
  • Average wind speed in December: 7.6mph

The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

Average humidity in December
Wescosville, PA

Average humidity in December - Wescosville, PA
  • Average humidity in December: 80%

The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are April and July (76%).

Average rainfall in December
Wescosville, PA

Average rainfall in December - Wescosville, PA
  • Average rainfall in December: 2.68"

The wettest month (with the highest rainfall) is April (2.99").
The driest month (with the least rainfall) is September (1.77").

Average rainfall days in December
Wescosville, PA

Average rainfall days in December - Wescosville, PA
  • Average rainfall days in December: 11.2 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (8.5 days).

Average snowfall in December
Wescosville, PA

Average snowfall in December - Wescosville, PA
  • Average snowfall in December: 2.36"

The month with the highest snowfall is March (4.29").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Wescosville, PA

Average snowfall days in December - Wescosville, PA
  • Average snowfall days in December: 5 days

The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Wescosville, 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 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 24min).

Average sunshine days in December
Wescosville, PA

Average sunshine days in December - Wescosville, PA
  • Average sunshine days in December: 16.6 days

The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is April (11.2 days).

Average UV index in December
Wescosville, PA

Average UV index in December - Wescosville, PA
  • Average UV index in December: 2

The months with the highest UV index are 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
Wescosville, PA

Average cloud cover in December - Wescosville, PA
  • Average cloud cover in December: 51

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 33).

Average visibility in December
Wescosville, PA

Average visibility in December - Wescosville, PA
  • Average visibility in December: 5mi

The months with the highest visibility are April, June, July and November (6mi).
The months with the lowest visibility are January, February, March, May, August, September, October and December (5mi).

Wescosville, Pennsylvania, USA

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