December weather forecast
Crossroads, PA

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Weather in December

The first month of the winter, December, is also a wintry month in Crossroads, Pennsylvania, with an average temperature ranging between min 28°F (-2.2°C) and max 39°F (3.9°C).

Temperature

The shift from November to December involves a decrease in the average high-temperature, dropping from a frosty 48.6°F (9.2°C) to an icy 39°F (3.9°C). An average low-temperature of 28°F (-2.2°C) is noted during the nights in December.

Humidity

In December, the average relative humidity is 81%.

Rainfall

In Crossroads, in December, it is raining for 13.1 days, with typically 3.19" (81mm) of accumulated precipitation. In Crossroads, during the entire year, the rain falls for 167 days and collects up to 33.5" (851mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In December, it is snowing for 6.1 days. Throughout December, 3.19" (81mm) of snow is accumulated. Throughout the year, there are 33.8 snowfall days, and 17.91" (455mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of December, sunrise is at 7:07 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:44 pm EST.

Sunshine

In Crossroads, the average sunshine in December is 4.7h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index of 1 during December translates into these guidelines:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Updated: Aug 21, 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°F (3.9°C) and 28°F (-2.2°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in July is estimated at 89.6°F (32°C).

What is the average humidity in December?

In Crossroads, the average relative humidity in December is 81%.

How many days does it rain in December?

In December, the rain falls for 13.1 days. Throughout December, 3.19" (81mm) of precipitation is accumulated.

How many days does it snow in December?

In Crossroads, in December, snow falls for 6.1 days, with typically accumulated 3.19" (81mm) of snow.

What is the month with the shortest days?

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

What is the average length of the day in December?

In December, the average day length is 9h and 19min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:07 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:44 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?

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

What is the UV index intensity in December?

In December, the average daily maximum UV index is 1. A UV Index of 2, and less, symbolizes 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
Crossroads, PA

Average temperature in December - Crossroads, PA
  • Average high temperature in December: 39°F

The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (33.4°F).

  • Average low temperature in December: 28°F

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).

Average pressure in December
Crossroads, PA

Average pressure in December - Crossroads, 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
Crossroads, PA

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

The windiest month (with the highest average wind speed) is March (8.2mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity in December
Crossroads, PA

Average humidity in December - Crossroads, PA
  • Average humidity in December: 81%

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

Average rainfall in December
Crossroads, PA

Average rainfall in December - Crossroads, PA
  • Average rainfall in December: 3.19"

The wettest month (with the highest rainfall) is July (3.46").
The driest month (with the least rainfall) is September (2.01").

Average rainfall days in December
Crossroads, PA

Average rainfall days in December - Crossroads, PA
  • Average rainfall days in December: 13.1 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (9.9 days).

Average snowfall in December
Crossroads, PA

Average snowfall in December - Crossroads, PA
  • Average snowfall in December: 3.19"

The month with the highest snowfall is February (4.88").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Crossroads, PA

Average snowfall days in December - Crossroads, PA
  • Average snowfall days in December: 6.1 days

The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Crossroads, 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 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 30min).

Average sunshine days in December
Crossroads, PA

Average sunshine days in December - Crossroads, PA
  • Average sunshine days in December: 14.8 days

The month with the most sunshine days is November (16.9 days).
The month with the least sunshine days is June (10.9 days).

Average UV index in December
Crossroads, PA

Average UV index in December - Crossroads, 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
Crossroads, PA

Average cloud cover in December - Crossroads, 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 34).

Average visibility in December
Crossroads, PA

Average visibility in December - Crossroads, 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).

Crossroads, Pennsylvania, USA

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