December weather forecast
Wernersville, PA

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Weather in December

The first month of the winter, December, is also a wintry month in Wernersville, Pennsylvania, with temperature in the range of an average low of 29.3°F (-1.5°C) and an average high of 40.6°F (4.8°C).

Temperature

December's onset brings a slight change in high-temperatures, falling from a fresh 50°F (10°C) in November to a cold 40.6°F (4.8°C). Wernersville, during December, witnesses an average low-temperature of 29.3°F (-1.5°C).

Humidity

The average relative humidity in December is 80%.

Rainfall

In Wernersville, in December, it is raining for 11.8 days, with typically 2.44" (62mm) of accumulated precipitation. In Wernersville, during the entire year, the rain falls for 158.3 days and collects up to 29.76" (756mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In December, it is snowing for 4.4 days. Throughout December, 1.54" (39mm) of snow is accumulated. In Wernersville, during the entire year, snow falls for 26.5 days and aggregates up to 12.64" (321mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 24min of daylight.
On the first day of December, sunrise is at 7:08 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:27 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 reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: In December, the maximum UV index of 2 transforms into these recommendations:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.

Frequently asked questions

How cold is it in December?

In Wernersville, 40.6°F (4.8°C) is the average high-temperature and 29.3°F (-1.5°C) is the average low-temperature during December. The average heat index (a.k.a. 'feels like', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in August is estimated at 86°F (30°C).

What is the average humidity in December?

The average relative humidity in December is 80%.

How many days does it rain in December?

In December, in Wernersville, the rain falls for 11.8 days. Throughout December, 2.44" (62mm) of precipitation is accumulated.

How much does it snow in December?

In Wernersville, during December, snow falls for 4.4 days and regularly aggregates up to 1.54" (39mm) of snow.

What is the month with the shortest days?

The month with the shortest days in Wernersville, Pennsylvania, is December, with an average of 9h and 24min of daylight.

What is the average length of the day in December?

In December, the average day length is 9h and 21min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:08 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:48 pm EST.

How long on average sun shines in December in Wernersville?

In December, the average sunshine duration is 4.7h.

What are the months with 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.

What is the UV index intensity in December?

The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health risk from unsafe 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
Wernersville, PA

Average temperature in December - Wernersville, PA
  • Average high temperature in December: 40.6°F

The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (35.1°F).

  • Average low temperature in December: 29.3°F

The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).

Average pressure in December
Wernersville, PA

Average pressure in December - Wernersville, 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
Wernersville, PA

Average wind speed in December - Wernersville, PA
  • Average wind speed in December: 7.9mph

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity in December
Wernersville, PA

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

The months with the highest relative humidity are February and October (81%).
The month with the lowest relative humidity is April (76%).

Average rainfall in December
Wernersville, PA

Average rainfall in December - Wernersville, PA
  • Average rainfall in December: 2.44"

The wettest month (with the highest rainfall) is August (2.95").
The driest month (with the least rainfall) is September (1.85").

Average rainfall days in December
Wernersville, PA

Average rainfall days in December - Wernersville, PA
  • Average rainfall days in December: 11.8 days

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is January (7.8 days).

Average snowfall in December
Wernersville, PA

Average snowfall in December - Wernersville, PA
  • Average snowfall in December: 1.54"

The month with the highest snowfall is March (3.54").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Wernersville, PA

Average snowfall days in December - Wernersville, PA
  • Average snowfall days in December: 4.4 days

The month with the highest number of snowfall days is January (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
Wernersville, PA

Average daylight in December / Average sunshine in December - Wernersville, 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 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in December
Wernersville, PA

Average sunshine days in December - Wernersville, PA
  • Average sunshine days in December: 16.4 days

The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is May (11.2 days).

Average UV index in December
Wernersville, PA

Average UV index in December - Wernersville, 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
Wernersville, PA

Average cloud cover in December - Wernersville, PA
  • Average cloud cover in December: 50

The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in December
Wernersville, PA

Average visibility in December - Wernersville, PA
  • Average visibility in December: 6mi

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

Wernersville, Pennsylvania, USA

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