December weather forecast
Collinsburg, PA

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Weather in December

December, the first month of the winter in Collinsburg, is still a cold month, with an average temperature varying between 39.9°F (4.4°C) and 28.4°F (-2°C).

Temperature

The start of December involves a temperature drop, moving from a chilly 49.5°F (9.7°C) in November to an icy 39.9°F (4.4°C). Collinsburg experiences a steady low-temperature of 28.4°F (-2°C) throughout December.

Humidity

The average relative humidity in December is 84%.

Rainfall

In Collinsburg, during December, the rain falls for 12.7 days and regularly aggregates up to 1.97" (50mm) of precipitation. Throughout the year, there are 174.1 rainfall days, and 23.82" (605mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. In Collinsburg, in December, during 11.5 snowfall days, 2.91" (74mm) of snow is typically accumulated. Throughout the year, there are 54.8 snowfall days, and 13.58" (345mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 24min of daylight.
On the first day of the month, sunrise is at 7:22 am and sunset at 4:53 pm. On the last day of December, sunrise is at 7:41 am and sunset at 5:03 pm EST.

Sunshine

In December, the average sunshine is 3.6h.

UV index

The month with the lowest UV index in Collinsburg is December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In December, the maximum UV index of 1 transforms into these recommendations:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Updated: Aug 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

In December, the average high-temperature and low-temperature are 39.9°F (4.4°C) and 28.4°F (-2°C) respectively. In August, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is computed to be 86°F (30°C).

What is the average humidity in December?

The average relative humidity in December is 84%.

How much does it rain in December?

In Collinsburg, Pennsylvania, during December, the rain falls for 12.7 days and regularly aggregates up to 1.97" (50mm) of precipitation.

How many days does it snow in December?

In December, it is snowing for 11.5 days. Throughout December, 2.91" (74mm) of snow is accumulated.

What is the month with the shortest days?

December has the shortest days of the year, 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 in Collinsburg is 9h and 22min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:22 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 5:03 pm EST.

How many hours of sunshine does Collinsburg have in December?

In December, the average sunshine duration is 3.6h.

When is the lowest UV index in Collinsburg?

December is the month with the lowest UV index, with an average maximum UV index of 1.

How high is the UV index in December?

In December, the average daily maximum UV index is 1. 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
Collinsburg, PA

Average temperature in December - Collinsburg, PA
  • Average high temperature in December: 39.9°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 (33.6°F).

  • Average low temperature in December: 28.4°F

The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).

Average pressure in December
Collinsburg, PA

Average pressure in December - Collinsburg, PA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in December
Collinsburg, PA

Average wind speed in December - Collinsburg, PA
  • Average wind speed in December: 7.5mph

The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

Average humidity in December
Collinsburg, PA

Average humidity in December - Collinsburg, PA
  • Average humidity in December: 84%

The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April, July and August (77%).

Average rainfall in December
Collinsburg, PA

Average rainfall in December - Collinsburg, PA
  • Average rainfall in December: 1.97"

The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is November (1.42").

Average rainfall days in December
Collinsburg, PA

Average rainfall days in December - Collinsburg, PA
  • Average rainfall days in December: 12.7 days

The month with the highest number of rainy days is May (19.7 days).
The month with the least rainy days is February (10 days).

Average snowfall in December
Collinsburg, PA

Average snowfall in December - Collinsburg, PA
  • Average snowfall in December: 2.91"

The month with the highest snowfall is January (3.66").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Collinsburg, PA

Average snowfall days in December - Collinsburg, PA
  • Average snowfall days in December: 11.5 days

The month with the highest number of snowfall days is January (16.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Collinsburg, 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: 3h and 4min

The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

Average sunshine days in December
Collinsburg, PA

Average sunshine days in December - Collinsburg, PA
  • Average sunshine days in December: 9.5 days

The month with the most sunshine days is November (15.8 days).
The month with the least sunshine days is January (7.3 days).

Average UV index in December
Collinsburg, PA

Average UV index in December - Collinsburg, PA
  • Average UV index in December: 1

The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Collinsburg, PA

Average cloud cover in December - Collinsburg, PA
  • Average cloud cover in December: 64

The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 33).

Average visibility in December
Collinsburg, PA

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

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

Collinsburg, Pennsylvania, USA

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