December weather forecast
Coles Mill, PA

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Weather in December

December, the first month of the winter in Coles Mill, is also an icy month, with an average temperature fluctuating between 27°F (-2.8°C) and 37.6°F (3.1°C).

Temperature

Coles Mill's December weather comes with a decrease in average high-temperatures, moving from a frosty 47.3°F (8.5°C) in November to a wintry 37.6°F (3.1°C). Coles Mill observes an average low-temperature of 27°F (-2.8°C) during December.

Humidity

The average relative humidity in December is 82%.

Rainfall

In Coles Mill, in December, it is raining for 12.4 days, with typically 2.52" (64mm) of accumulated precipitation. Throughout the year, there are 166.3 rainfall days, and 31.06" (789mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Coles Mill, in December, snow falls for 9.4 days, with typically accumulated 3.94" (100mm) of snow. Throughout the year, there are 47.6 snowfall days, and 22.91" (582mm) of snow is accumulated.

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 7:12 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 4:47 pm EST.

Sunshine

In Coles Mill, the average sunshine in December is 4.1h.

UV index

With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the average person.
Note: In December, the UV index of 1 transforms into the following advice:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. It's recommended to limit sun exposure when its radiation is at its peak during midday. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.

Frequently asked questions

Is it cold during December?

During December, Coles Mill experiences an average high-temperature of 37.6°F (3.1°C) and a low-temperature of 27°F (-2.8°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, in July is computed to be 87.8°F (31°C).

What is the average humidity in December?

In Coles Mill, the average relative humidity in December is 82%.

How much does it rain in Coles Mill in December?

In Coles Mill, during December, the rain falls for 12.4 days and regularly aggregates up to 2.52" (64mm) of precipitation.

How much does it snow in December?

In Coles Mill, during December, snow falls for 9.4 days and regularly aggregates up to 3.94" (100mm) of snow.

What is the month with the shortest days?

The month with the shortest days in Coles Mill, Pennsylvania, is December, with an average of 9h and 18min of daylight.

How many hours of daylight does Coles Mill have in December?

In Coles Mill, the average day length in December is 9h and 16min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:12 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 4:47 pm EST.

How long on average sun shines in December in Coles Mill?

In December, the average sunshine duration is 4.1h.

What is the month with the lowest UV index?

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

What is the UV index intensity in December?

In Coles Mill, the average daily maximum UV index in December is 1. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's 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
Coles Mill, PA

Average temperature in December - Coles Mill, PA
  • Average high temperature in December: 37.6°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (31.8°F).

  • Average low temperature in December: 27°F

The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (19°F).

Average pressure in December
Coles Mill, PA

Average pressure in December - Coles Mill, PA
  • Average pressure in December: 30.09"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
Coles Mill, PA

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

The windiest months (with the highest average wind speed) are March and April (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity in December
Coles Mill, PA

Average humidity in December - Coles Mill, PA
  • Average humidity in December: 82%

The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (77%).

Average rainfall in December
Coles Mill, PA

Average rainfall in December - Coles Mill, PA
  • Average rainfall in December: 2.52"

The wettest months (with the highest rainfall) are April and May (2.99").
The driest month (with the least rainfall) is September (2.05").

Average rainfall days in December
Coles Mill, PA

Average rainfall days in December - Coles Mill, PA
  • Average rainfall days in December: 12.4 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (9.3 days).

Average snowfall in December
Coles Mill, PA

Average snowfall in December - Coles Mill, PA
  • Average snowfall in December: 3.94"

The month with the highest snowfall is January (5.94").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Coles Mill, PA

Average snowfall days in December - Coles Mill, PA
  • Average snowfall days in December: 9.4 days

The month with the highest number of snowfall days is January (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Coles Mill, PA

Average daylight in December / Average sunshine in December - Coles Mill, PA
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).

Average sunshine days in December
Coles Mill, PA

Average sunshine days in December - Coles Mill, PA
  • Average sunshine days in December: 12.5 days

The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is February (9.8 days).

Average UV index in December
Coles Mill, PA

Average UV index in December - Coles Mill, PA
  • Average UV index in December: 1

The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Coles Mill, PA

Average cloud cover in December - Coles Mill, PA
  • Average cloud cover in December: 58

The months with the most cloud cover are February and December (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 35).

Average visibility in December
Coles Mill, PA

Average visibility in December - Coles Mill, PA
  • Average visibility in December: 5mi

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

Coles Mill, Pennsylvania, USA

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