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

With the onset of December, York experiences a modest temperature adjustment, with the average high-temperature receding from a fresh 50.9°F (10.5°C) in November to a wintry 41.9°F (5.5°C). An average nighttime temperature of 29.7°F (-1.3°C) is noted during the month of December.

Humidity

The average relative humidity in December in York is 79%.

Rainfall

In York, in December, it is raining for 9.4 days, with typically 1.26" (32mm) of accumulated precipitation. In York, during the entire year, the rain falls for 134.1 days and collects up to 17.83" (453mm) of precipitation.

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, there are 20.6 snowfall days, and 7.64" (194mm) of snow is accumulated.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year.
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.

Sunshine

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

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for average individuals.
Note: An average maximum UV index of 2 in December leads to these recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.

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Frequently asked questions

How cold is December in York?

The high-temperature, in December, in York, records 41.9°F (5.5°C), while the low-temperature is 29.7°F (-1.3°C). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, is appraised at 86°F (30°C).

What is the average humidity in December in York?

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

How much does it rain in York in December?

In York, Pennsylvania, 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 York, Pennsylvania, in December, during 3.5 snowfall days, 0.98" (25mm) of snow is typically accumulated.

What is the month with the shortest days in York?

With an average of 9h and 24min of daylight, December has the shortest days of the year in York, Pennsylvania.

How many hours of daylight does York have in December?

In York, the average day length in December is 9h and 23min.

When is the sunrise / sunset in December in York?

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

How long on average sun shines in December in York?

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

When is the lowest UV index in York?

January, February, 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 in York?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to Sun's UV rays.

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).

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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).

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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).

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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%).

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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").

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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).

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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").

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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).

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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).

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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).

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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).

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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).

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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).

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December weather forecast
York, PA

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