December weather forecast
Fannettsburg, PA

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Weather in December

December, the first month of the winter in Fannettsburg, is also an icy month, with temperature in the range of an average high of 40.8°F (4.9°C) and an average low of 28.9°F (-1.7°C).

Temperature

The commencement of December indicates a shift in the average high-temperature, receding from November's cool 50°F (10°C) to a cold 40.8°F (4.9°C). Throughout December in Fannettsburg, a steady low-temperature average of 28.9°F (-1.7°C) is noted.

Humidity

The average relative humidity in December is 79%.

Rainfall

In Fannettsburg, in December, it is raining for 10.8 days, with typically 2.05" (52mm) of accumulated precipitation. Throughout the year, there are 156 rainfall days, and 27.2" (691mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In Fannettsburg, during December, snow falls for 4.2 days and regularly aggregates up to 1.73" (44mm) of snow. Throughout the year, there are 28.8 snowfall days, and 15.39" (391mm) 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 7:14 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 4:56 pm EST.

Sunshine

In December, the average sunshine 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. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A daily maximum UV index of 2 in December translates into the following instructions:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. To guard against the harmful effects of the Sun, minimize exposure during midday. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Updated: Jul 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is December cold?

The average high-temperature and low-temperature during December are 40.8°F (4.9°C) and 28.9°F (-1.7°C) respectively. The average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, in August is estimated at 87.8°F (31°C).

What is the average humidity in December?

The average relative humidity in December is 79%.

How many days does it rain in December?

In Fannettsburg, Pennsylvania, in December, it is raining for 10.8 days, with typically 2.05" (52mm) of accumulated precipitation.

How many days does it snow in December?

In Fannettsburg, in December, during 4.2 snowfall days, 1.73" (44mm) of snow is typically accumulated.

What is the month with the shortest days?

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

How many hours of daylight does Fannettsburg have in December?

The average day length in December is 9h and 23min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:14 am and sunset at 4:46 pm. On the last day of the month, in Fannettsburg, sunrise is at 7:33 am and sunset at 4:56 pm EST.

How many hours of sunshine does Fannettsburg have in December?

The average sunshine duration in December is 4.6h.

When is the lowest UV index?

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

What is the UV index reading in December?

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health threat 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
Fannettsburg, PA

Average temperature in December - Fannettsburg, PA
  • Average high temperature in December: 40.8°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (35.1°F).

  • Average low temperature in December: 28.9°F

The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).

Average pressure in December
Fannettsburg, PA

Average pressure in December - Fannettsburg, PA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in December
Fannettsburg, PA

Average wind speed in December - Fannettsburg, PA
  • Average wind speed in December: 7.2mph

The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

Average humidity in December
Fannettsburg, PA

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

The months with the highest relative humidity are February and October (80%).
The month with the lowest relative humidity is July (75%).

Average rainfall in December
Fannettsburg, PA

Average rainfall in December - Fannettsburg, PA
  • Average rainfall in December: 2.05"

The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is January (1.85").

Average rainfall days in December
Fannettsburg, PA

Average rainfall days in December - Fannettsburg, PA
  • Average rainfall days in December: 10.8 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (7.3 days).

Average snowfall in December
Fannettsburg, PA

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

The month with the highest snowfall is January (4.92").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Fannettsburg, PA

Average snowfall days in December - Fannettsburg, PA
  • Average snowfall days in December: 4.2 days

The month with the highest number of snowfall days is January (8.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Fannettsburg, 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 4min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).

Average sunshine days in December
Fannettsburg, PA

Average sunshine days in December - Fannettsburg, PA
  • Average sunshine days in December: 16.6 days

The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (11.6 days).

Average UV index in December
Fannettsburg, PA

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

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

Average cloud cover in December
Fannettsburg, PA

Average cloud cover in December - Fannettsburg, PA
  • Average cloud cover in December: 52

The months with the most cloud cover are January, February and December (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 33).

Average visibility in December
Fannettsburg, PA

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

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

Fannettsburg, Pennsylvania, USA

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