December weather forecast
Adamstown, PA

Share

Weather in December

December, the first month of the winter in Adamstown, is still a cold month, with an average temperature fluctuating between 41.2°F (5.1°C) and 29.8°F (-1.2°C).

Temperature

A moderate decline in the average high-temperature is seen during December, decreasing from a fresh 50.4°F (10.2°C) in November to a wintry 41.2°F (5.1°C). Throughout December nights, Adamstown experiences a consistent temperature average of 29.8°F (-1.2°C).

Humidity

The average relative humidity in December is 80%.

Rainfall

In December, the rain falls for 8.6 days. Throughout December, 0.83" (21mm) of precipitation is accumulated. Throughout the year, there are 127.9 rainfall days, and 11.69" (297mm) of precipitation is accumulated.

Snowfall

January through March, May, November and December are months with snowfall. In Adamstown, in December, snow falls for 3 days, with typically accumulated 0.43" (11mm) of snow. In Adamstown, during the entire year, snow falls for 18.5 days and aggregates up to 3.86" (98mm) of snow.

Daylight

December has the shortest days of the year in Adamstown, with an average of 9h and 24min of daylight.
On the first day of December, sunrise is at 7:08 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:48 pm EST.

Sunshine

The average sunshine in December is 4.8h.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, the maximum UV index of 2 suggests this advice:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.

Frequently asked questions

How cold is it in December?

During December, Adamstown experiences an average high-temperature of 41.2°F (5.1°C) and a low-temperature of 29.8°F (-1.2°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in August is evaluated at 86°F (30°C).

What is the average humidity in December?

The average relative humidity in December is 80%.

How many days does it rain in December?

In Adamstown, in December, during 8.6 rainfall days, 0.83" (21mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Adamstown, in December, during 3 snowfall days, 0.43" (11mm) of snow is typically accumulated.

What is the month with the shortest days?

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

How many hours of daylight does Adamstown have in December?

In Adamstown, the average day length in December is 9h and 22min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:08 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:48 pm EST.

How long on average sun shines in December?

In December, the average sunshine duration is 4.8h.

What is the month with 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?

The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health risk 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
Adamstown, PA

Average temperature in December - Adamstown, PA
  • Average high temperature in December: 41.2°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 (35.2°F).

  • Average low temperature in December: 29.8°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 (22.5°F).

Average pressure in December
Adamstown, PA

Average pressure in December - Adamstown, 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
Adamstown, PA

Average wind speed in December - Adamstown, PA
  • Average wind speed in December: 8.1mph

The windiest months (with the highest average wind speed) are January and March (8.6mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

Average humidity in December
Adamstown, PA

Average humidity in December - Adamstown, PA
  • Average humidity in December: 80%

The months with the highest relative humidity are February, May and October (81%).
The month with the lowest relative humidity is April (76%).

Average rainfall in December
Adamstown, PA

Average rainfall in December - Adamstown, PA
  • Average rainfall in December: 0.83"

The wettest month (with the highest rainfall) is July (1.46").
The driest month (with the least rainfall) is February (0.67").

Average rainfall days in December
Adamstown, PA

Average rainfall days in December - Adamstown, PA
  • Average rainfall days in December: 8.6 days

The month with the highest number of rainy days is July (14.8 days).
The month with the least rainy days is January (6.5 days).

Average snowfall in December
Adamstown, PA

Average snowfall in December - Adamstown, PA
  • Average snowfall in December: 0.43"

The month with the highest snowfall is January (1.18").
The months with the least snowfall are April, June, July, August, September and October (0").

Average snowfall days in December
Adamstown, PA

Average snowfall days in December - Adamstown, PA
  • Average snowfall days in December: 3 days

The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Adamstown, 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 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in December
Adamstown, PA

Average sunshine days in December - Adamstown, PA
  • Average sunshine days in December: 19.5 days

The month with the most sunshine days is November (21 days).
The month with the least sunshine days is July (12.5 days).

Average UV index in December
Adamstown, PA

Average UV index in December - Adamstown, 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).

Average cloud cover in December
Adamstown, PA

Average cloud cover in December - Adamstown, PA
  • Average cloud cover in December: 49

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

Average visibility in December
Adamstown, PA

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

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

Adamstown, Pennsylvania, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location