December weather - Winter 2024

Weather in December
Frequently asked questions
Average temperature in December
Average pressure in December
Average wind speed in December
Average humidity in December
Average rainfall in December
Average rainfall days in December
Average snowfall in December
Average snowfall days in December
Average daylight in December
Average sunshine in December
Average sunshine days in December
Average UV index in December
Average cloud cover in December
Average visibility in December

This courthouse of the York County, Pennsylvania, stands tall in the bright evening sunlight rays

Weather in December

In December, York plunges into winter, with its characteristic frosty conditions and pared-back landscapes. The climate sees an average low of 29.7°F (-1.3°C), reestablishing the onset of colder months, while daylight diminishes further, curtailing to a scant 9.4 hours. Devoid of its leafy cover, the city’s bare scenery achieves an unadorned magnificence, emphasized by the occasional scattering of snowfall. Notwithstanding the cold and short daylight hours, December carries a distinct, festive charm. As the year concludes, York anticipates the arrival anew of January's chilly skies, marking another complete turn of the seasonal cycle.

Temperature

The arrival of December corresponds with a reduction in the average high-temperature, down from November's fresh 50.9°F (10.5°C) to an icy 41.9°F (5.5°C). York's nighttime temperature during December is consistently averaged at a subzero cold 29.7°F (-1.3°C).

Humidity

In York, the average relative humidity in December is 79%.

Rainfall

In York, in December, during 9.4 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. Throughout the year, there are 134.1 rainfall days, and 17.83" (453mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, October through December. In York, during December, snow falls for 3.5 days and regularly aggregates up to 0.98" (25mm) of snow. Throughout the year, in York, there are 20.6 snowfall days, and 7.64" (194mm) 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 7:10 am and sunset at 4:42 pm. On the last day of December, sunrise is at 7:28 am and sunset at 4:51 pm EST.

Sunshine

In December, the average sunshine in York is 4.8h.

UV index

The months with the lowest UV index are January, February, 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 ordinary individuals.
Note: An average maximum UV index of 2 in December leads to these recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.

Updated: Jun 4, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is December cold?

In December, the average high-temperature and low-temperature in York are 41.9°F (5.5°C) and 29.7°F (-1.3°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in August is calculated to be 86°F (30°C).

What is the average humidity in December?

In December, the average relative humidity in York is 79%.

How much does it rain in December?

In York, in December, it is raining for 9.4 days, with typically 1.26" (32mm) of accumulated precipitation.

How many days does it snow in December?

In York, in December, snow falls for 3.5 days, with typically accumulated 0.98" (25mm) of snow.

What is the month with the shortest days?

The month with the shortest days 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 23min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:10 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:51 pm EST.

How long on average sun shines in December?

In York, the average sunshine duration in December is 4.8h.

What is the month with the lowest UV index in York?

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

What is the UV index reading in December?

In York, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

50.9°F 10.5°C

41.9°F 5.5°C

35.4°F 1.9°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

8.2mph 13.2km/h

8.8mph 14.2km/h

9.3mph 15km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

20.1

18.5

19.3

Average UV index

Average cloud cover

40%

48%

Average visibility

6mi 9.7km

Average temperature in December
York, PA

Average high temperature in December: 41.9°F

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (35.4°F).

Average low temperature in December: 29.7°F

The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).

Average pressure in December
York, 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
York, PA

Average wind speed in December: 8.1mph

The windiest month (with the highest average wind speed) is March (8.7mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity in December
York, PA

Average humidity in December: 79%

The months with the highest relative humidity are February, May and October (80%).
The months with the lowest relative humidity are March and April (76%).

Average rainfall in December
York, PA

Average rainfall in December: 1.26"

The wettest months (with the highest rainfall) are July and August (2.01").
The driest month (with the least rainfall) is January (1.06").

Average rainfall days in December
York, PA

Average rainfall days in December: 9.4 days

The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is January (6 days).

Average snowfall in December
York, PA

Average snowfall in December: 0.98"

The month with the highest snowfall is January (2.4").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
York, PA

Average snowfall days in December: 3.5 days

The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
York, 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 5min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in December
York, PA

Average sunshine days in December: 18.5 days

The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is May (12.8 days).

Average UV index in December
York, PA

Average UV index in December: 2

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in December
York, PA

Average cloud cover in December: 48

The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in December
York, PA

Average visibility in December: 6mi

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

December weather forecast
York, PA

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