December weather forecast
Mohnton, PA

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Weather in December

December, the first month of the winter in Mohnton, is also a wintry month, with an average temperature fluctuating between 40.6°F (4.8°C) and 29.3°F (-1.5°C).

Temperature

The arrival of December corresponds with a shift in temperature, down from a cool 50°F (10°C) in November to a wintry 40.6°F (4.8°C). Nighttime temperatures consistently average a subzero cold 29.3°F (-1.5°C) during December.

Humidity

In December, the average relative humidity is 80%.

Rainfall

In Mohnton, in December, during 11.8 rainfall days, 2.44" (62mm) of precipitation is typically accumulated. Throughout the year, there are 158.3 rainfall days, and 29.76" (756mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In Mohnton, in December, during 4.4 snowfall days, 1.54" (39mm) of snow is typically accumulated. Throughout the year, there are 26.5 snowfall days, and 12.64" (321mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 24min of daylight.
On the first day of the month, sunrise is at 7:07 am and sunset at 4:38 pm. On the last day of December, sunrise is at 7:26 am and sunset at 4:48 pm EST.

Sunshine

In December, the average sunshine is 4.7h.

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 value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: In December, the maximum UV index of 2 suggests this advice:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Updated: Jul 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it cold during December?

December temperatures vary between a high-temperature of 40.6°F (4.8°C) and a low-temperature of 29.3°F (-1.5°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, is computed to be 86°F (30°C).

What is the average humidity in December in Mohnton?

The average relative humidity in December is 80%.

How many days does it rain in December?

In Mohnton, in December, it is raining for 11.8 days, with typically 2.44" (62mm) of accumulated precipitation.

How much does it snow in Mohnton in December?

In Mohnton, in December, during 4.4 snowfall days, 1.54" (39mm) of snow is typically accumulated.

What is the month with the shortest days in Mohnton?

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

How many hours of daylight does Mohnton have in December?

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

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:07 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 4.7h.

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?

In December, the average daily maximum UV index is 2. A UV Index value 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
Mohnton, PA

Average temperature in December - Mohnton, PA
  • Average high temperature in December: 40.6°F

The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (35.1°F).

  • Average low temperature in December: 29.3°F

The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).

Average pressure in December
Mohnton, PA

Average pressure in December - Mohnton, 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
Mohnton, PA

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

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity in December
Mohnton, PA

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

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

Average rainfall in December
Mohnton, PA

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

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

Average rainfall days in December
Mohnton, PA

Average rainfall days in December - Mohnton, PA
  • Average rainfall days in December: 11.8 days

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is January (7.8 days).

Average snowfall in December
Mohnton, PA

Average snowfall in December - Mohnton, PA
  • Average snowfall in December: 1.54"

The month with the highest snowfall is March (3.54").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Mohnton, PA

Average snowfall days in December - Mohnton, PA
  • Average snowfall days in December: 4.4 days

The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

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

Average sunshine days in December
Mohnton, PA

Average sunshine days in December - Mohnton, PA
  • Average sunshine days in December: 16.4 days

The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is May (11.2 days).

Average UV index in December
Mohnton, PA

Average UV index in December - Mohnton, 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
Mohnton, PA

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

The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in December
Mohnton, PA

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

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

Mohnton, Pennsylvania, USA

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