Gettysburg
Pennsylvania, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Gettysburg, PA

The iconic and unifying Pennsylvania monument in a vast green field with neat grounds and green trees in the city of Gettysburg, clear sky
The iconic and unifying Pennsylvania monument in a vast green field with neat grounds and green trees in the city of Gettysburg, clear sky
The first month of the winter, December, is still a chilly month in Gettysburg, Pennsylvania, with average temperature ranging between max 43°F (6.1°C) and min 25°F (-3.9°C).

Temperature

In Gettysburg, Pennsylvania, the average high-temperature drops, from a cool 55°F (12.8°C) in November, to a frosty 43°F (6.1°C). The average low-temperature, in December, is 25°F (-3.9°C).

Rainfall

In Gettysburg, Pennsylvania, it is raining for 11 days, with typically 3.2" (82mm) of accumulated precipitation. In Gettysburg, Pennsylvania, during the entire year, the rain falls for 125 days and collects up to 43.2" (1098.1mm) of precipitation.

Daylight

December has the shortest days of the year, with an average of 9.4h of daylight.

Sunshine

The month with the least sunshine in Gettysburg is December, with an average of 4h of sunshine.

UV index

January, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Gettysburg. A UV Index value of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 2 in December transform into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in December in Gettysburg?

In Gettysburg, Pennsylvania, in December, the average high-temperature is 43°F (6.1°C), and the average low-temperature is 25°F (-3.9°C).

How many days does it rain in December in Gettysburg?

In Gettysburg, during December, the rain falls for 11 days and regularly aggregates up to 3.2" (82mm) of precipitation.

What is the month with the shortest days in Gettysburg?

December has the shortest days of the year in Gettysburg, Pennsylvania, with an average of 9.4h of daylight.

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

In Gettysburg, the average length of the day in December is 9.4h.

What is the month with the least sunshine in Gettysburg?

With an average of 4h of sunshine, December has the least sunshine of the year.

How long on average sun shines in December in Gettysburg?

In December, the average sunshine is 4h.

What are the months with the lowest UV index in Gettysburg?

Months with the lowest UV index in Gettysburg, Pennsylvania, are January, November and December, with an average maximum UV index of 2.

What is the UV index intensity in December in Gettysburg?

The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health threat from the exposure to the Sun's UV rays.
Average temperature in December - Gettysburg, PA
  • Average high temperature in December: 43°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (39°F).

  • Average low temperature in December: 25°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (21°F).

Average rainfall in December - Gettysburg, PA
  • Average rainfall in December: 3.2"

Wettest months (with the highest rainfall) are May and June (4.3").
The driest month (with the lowest rainfall) is February (3").

Average rainfall days in December - Gettysburg, PA
  • Average rainfall days in December: 11 days

The month with the highest number of rainy days is May (12 days).
Months with the lowest number of rainy days are September and October (9 days).

Average daylight in December / Average sunshine in December - Gettysburg, PA
  • Average daylight in December: 9.4h

The month with the longest days is June (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 4h

Months with most sunshine are June, July and August (Average sunshine: 9h).
The month with least sunshine is December (Average sunshine: 4h).

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

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January, November and December (UV index 2).