December weather forecast
Hershey, PA

Weather in December

December, the first month of the winter in Hershey, is still a cold month, with an average temperature fluctuating between 41°F (5°C) and 29.5°F (-1.4°C).

Temperature

In Hershey, the average high-temperature in December marginally drops from a chilly 49.8°F (9.9°C) in November to a wintry 41°F (5°C). In Hershey, Pennsylvania, the average low-temperature is 29.5°F (-1.4°C).

Humidity

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

Rainfall

In Hershey, in December, during 12 rainfall days, 2.44" (62mm) of precipitation is typically accumulated. Throughout the year, in Hershey, there are 162.3 rainfall days, and 30.71" (780mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. In Hershey, Pennsylvania, during 5.2 snowfall days, 1.73" (44mm) of snow is typically accumulated. Throughout the year, in Hershey, there are 27.8 snowfall days, and 13.23" (336mm) of snow is accumulated.

Daylight

With an average of 9h and 22min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:09 am and sunset at 4:41 pm. On the last day of December, sunrise is at 7:29 am and sunset at 4:50 pm EST.

Sunshine

The average sunshine in December in Hershey is 4.6h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Hershey. 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: The average daily UV index of 2 in December transform into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Hershey?

In December, in Hershey, the average high-temperature is 41°F (5°C), and the average low-temperature is 29.5°F (-1.4°C). in July, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, is computed to be 89.6°F (32°C).

What is the average humidity in December in Hershey?

The average relative humidity in December is 79%.

How much does it rain in Hershey in December?

In Hershey, in December, it is raining for 12 days, with typically 2.44" (62mm) of accumulated precipitation.

How much does it snow in Hershey in December?

In Hershey, during December, snow falls for 5.2 days and regularly aggregates up to 1.73" (44mm) of snow.

What is the month with the shortest days in Hershey?

With an average of 9h and 22min of daylight, December has the shortest days of the year in Hershey, Pennsylvania.

What is the average length of the day in December in Hershey?

The average day length in December in Hershey, Pennsylvania, is 9h and 22min.

What time are sunrise and sunset in December in Hershey?

In December, on the first day of the month, sunrise is at 7:09 am and sunset at 4:41 pm. On the last day of the month, in Hershey, sunrise is at 7:29 am and sunset at 4:50 pm EST.

How long on average sun shines in December in Hershey?

In December, the average sunshine duration in Hershey is 4.6h.

When is the lowest UV index in Hershey?

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

What is the UV index intensity in December in Hershey?

The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from 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
Hershey, PA

Average temperature in December - Hershey, PA
  • Average high temperature in December: 41°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (34.2°F).

  • Average low temperature in December: 29.5°F

The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).

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Average pressure in December
Hershey, PA

Average pressure in December - Hershey, 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
Hershey, PA

Average wind speed in December - Hershey, PA
  • Average wind speed in December: 7.9mph

The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in December
Hershey, PA

Average humidity in December - Hershey, PA
  • Average humidity in December: 79%

The months with the highest relative humidity are February and May (81%).
The months with the lowest relative humidity are March and April (76%).

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Average rainfall in December
Hershey, PA

Average rainfall in December - Hershey, PA
  • Average rainfall in December: 2.44"

The wettest month (with the highest rainfall) is May (3.15").
The driest month (with the least rainfall) is September (2.05").

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Average rainfall days in December
Hershey, PA

Average rainfall days in December - Hershey, PA
  • Average rainfall days in December: 12 days

The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is January (8.5 days).

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Average snowfall in December
Hershey, PA

Average snowfall in December - Hershey, PA
  • Average snowfall in December: 1.73"

The month with the highest snowfall is January (3.94").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Hershey, PA

Average snowfall days in December - Hershey, PA
  • Average snowfall days in December: 5.2 days

The month with the highest number of snowfall days is January (9 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
Hershey, PA

Average daylight in December / Average sunshine in December - Hershey, PA
  • Average daylight in December: 9h and 22min

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 22min).

  • Average sunshine in December: 4h and 36min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

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Average sunshine days in December
Hershey, PA

Average sunshine days in December - Hershey, PA
  • Average sunshine days in December: 15.6 days

The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is May (10 days).

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Average UV index in December
Hershey, PA

Average UV index in December - Hershey, PA
  • Average UV index in December: 2

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

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Average cloud cover in December
Hershey, PA

Average cloud cover in December - Hershey, PA
  • Average cloud cover in December: 50

The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in December
Hershey, PA

Average visibility in December - Hershey, PA
  • Average visibility in December: 6mi

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

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