December weather forecast
Mifflin, PA

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Weather in December

December, the first month of the winter in Mifflin, is still a cold month, with temperature in the range of an average high of 39°F (3.9°C) and an average low of 27.5°F (-2.5°C).

Temperature

December brings a decrease in the average high-temperature, shifting from a frosty 48.4°F (9.1°C) in November to a cold 39°F (3.9°C). During the month of December, the nighttime temperature falls to an average of 27.5°F (-2.5°C).

Humidity

The average relative humidity in December is 81%.

Rainfall

In Mifflin, in December, it is raining for 10.5 days, with typically 2.17" (55mm) of accumulated precipitation. Throughout the year, there are 162 rainfall days, and 28.86" (733mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In Mifflin, in December, during 6 snowfall days, 2.76" (70mm) of snow is typically accumulated. Throughout the year, in Mifflin, there are 35.2 snowfall days, and 16.42" (417mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:14 am and sunset at 4:43 pm. On the last day of December, sunrise is at 7:33 am and sunset at 4:52 pm EST.

Sunshine

In Mifflin, the average sunshine in December is 4.1h.

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 value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The daily maximum UV index of 2 in December interprets into the following advice:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Stay sun-safe with clothing that is both closely woven and worn loosely. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Updated: Aug 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it cold during December?

The high-temperature during December is 39°F (3.9°C) and the low-temperature is 27.5°F (-2.5°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, in August is appraised at 86°F (30°C).

What is the average humidity in December?

In Mifflin, the average relative humidity in December is 81%.

How many days does it rain in December?

In Mifflin, during December, the rain falls for 10.5 days and regularly aggregates up to 2.17" (55mm) of precipitation.

How much does it snow in December?

In Mifflin, in December, during 6 snowfall days, 2.76" (70mm) of snow is typically accumulated.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 18min of daylight.

How many hours of daylight does Mifflin have in December?

In December, the average day length is 9h and 20min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:14 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 4:52 pm EST.

How many hours of sunshine does Mifflin have in December?

In Mifflin, the average sunshine duration in December is 4.1h.

What are the months 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 intensity in December in Mifflin?

In Mifflin, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation.
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
Mifflin, PA

Average temperature in December - Mifflin, PA
  • Average high temperature in December: 39°F

The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (32.9°F).

  • Average low temperature in December: 27.5°F

The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).

Average pressure in December
Mifflin, PA

Average pressure in December - Mifflin, 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 (29.95"Hg).

Average wind speed in December
Mifflin, PA

Average wind speed in December - Mifflin, PA
  • Average wind speed in December: 7mph

The windiest month (with the highest average wind speed) is January (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).

Average humidity in December
Mifflin, PA

Average humidity in December - Mifflin, PA
  • Average humidity in December: 81%

The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is July (75%).

Average rainfall in December
Mifflin, PA

Average rainfall in December - Mifflin, PA
  • Average rainfall in December: 2.17"

The wettest month (with the highest rainfall) is May (3.31").
The driest months (with the least rainfall) are January and November (1.85").

Average rainfall days in December
Mifflin, PA

Average rainfall days in December - Mifflin, PA
  • Average rainfall days in December: 10.5 days

The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is February (8.8 days).

Average snowfall in December
Mifflin, PA

Average snowfall in December - Mifflin, PA
  • Average snowfall in December: 2.76"

The month with the highest snowfall is January (4.49").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Mifflin, PA

Average snowfall days in December - Mifflin, PA
  • Average snowfall days in December: 6 days

The month with the highest number of snowfall days is January (10.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Mifflin, 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 18min).

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

Average sunshine days in December
Mifflin, PA

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

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is May (10.4 days).

Average UV index in December
Mifflin, PA

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

The month with the highest UV index is June (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
Mifflin, PA

Average cloud cover in December - Mifflin, PA
  • Average cloud cover in December: 56

The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is July (Cloud cover 34).

Average visibility in December
Mifflin, PA

Average visibility in December - Mifflin, PA
  • Average visibility in December: 5mi

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

Mifflin, Pennsylvania, USA

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