December weather forecast
Philadelphia, MO

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Weather in December

December, the first month of the winter in Philadelphia, is also an icy month, with an average temperature ranging between min 27.1°F (-2.7°C) and max 39.6°F (4.2°C).

Temperature

December suggests a modest reduction in the average high-temperature, shifting from a fresh 50.9°F (10.5°C) in November to a wintry 39.6°F (4.2°C). An average low-temperature of 27.1°F (-2.7°C) is recorded in the month of December.

Humidity

In Philadelphia, Missouri, the average relative humidity in December is 77%.

Rainfall

In December, the rain falls for 7.2 days. Throughout December, 1.54" (39mm) of precipitation is accumulated. In Philadelphia, Missouri, during the entire year, the rain falls for 138.1 days and collects up to 26.97" (685mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall in Philadelphia. In Philadelphia, in December, snow falls for 4.5 days, with typically accumulated 1.54" (39mm) of snow. Throughout the year, in Philadelphia, there are 23 snowfall days, and 9.92" (252mm) of snow is accumulated.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year in Philadelphia.
On the first day of the month, sunrise is at 7:09 am and sunset at 4:42 pm. On the last day of December, sunrise is at 7:28 am and sunset at 4:52 pm CST.

Sunshine

In December, the average sunshine is 4.9h.

UV index

January, February, 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 minimal health hazard from exposure to the Sun's UV rays for average individuals.
Note: An average maximum UV index of 2 in December leads to these recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December in Philadelphia?

In December, the average high-temperature and low-temperature in Philadelphia, Missouri, are 39.6°F (4.2°C) and 27.1°F (-2.7°C) respectively. In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which represents the influence of relative humidity on air temperature, is computed to be 93.2°F (34°C).

What is the average humidity in December in Philadelphia?

In December, the average relative humidity in Philadelphia is 77%.

How much does it rain in Philadelphia in December?

In Philadelphia, in December, during 7.2 rainfall days, 1.54" (39mm) of precipitation is typically accumulated.

How much does it snow in Philadelphia in December?

In December, in Philadelphia, it is snowing for 4.5 days. Throughout December, 1.54" (39mm) of snow is accumulated.

What is the month with the shortest days in Philadelphia?

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

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

The average day length in December in Philadelphia, Missouri, is 9h and 24min.

When are sunrise and sunset in December in Philadelphia?

On the first day of December in Philadelphia, sunrise is at 7:09 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:52 pm CST.

How many hours of sunshine does Philadelphia have in December?

In Philadelphia, the average sunshine duration in December is 4.9h.

What is the month with the lowest UV index in Philadelphia?

January, February, 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 Philadelphia?

The average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health risk 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
Philadelphia, MO

Average temperature in December - Philadelphia, MO
  • Average high temperature in December: 39.6°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (33.6°F).

  • Average low temperature in December: 27.1°F

The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (21°F).

Average pressure in December
Philadelphia, MO

Average pressure in December - Philadelphia, MO
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in December
Philadelphia, MO

Average wind speed in December - Philadelphia, MO
  • Average wind speed in December: 9.6mph

The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.3mph).

Average humidity in December
Philadelphia, MO

Average humidity in December - Philadelphia, MO
  • Average humidity in December: 77%

The months with the highest relative humidity are May, June and July (80%).
The month with the lowest relative humidity is October (70%).

Average rainfall in December
Philadelphia, MO

Average rainfall in December - Philadelphia, MO
  • Average rainfall in December: 1.54"

The wettest month (with the highest rainfall) is May (3.58").
The driest month (with the least rainfall) is January (1.3").

Average rainfall days in December
Philadelphia, MO

Average rainfall days in December - Philadelphia, MO
  • Average rainfall days in December: 7.2 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (5.4 days).

Average snowfall in December
Philadelphia, MO

Average snowfall in December - Philadelphia, MO
  • Average snowfall in December: 1.54"

The month with the highest snowfall is January (3.7").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Philadelphia, MO

Average snowfall days in December - Philadelphia, MO
  • Average snowfall days in December: 4.5 days

The month with the highest number of snowfall days is January (7.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Philadelphia, MO

Average daylight in December / Average sunshine in December - Philadelphia, MO
  • 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 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

Average sunshine days in December
Philadelphia, MO

Average sunshine days in December - Philadelphia, MO
  • Average sunshine days in December: 19.4 days

The months with the most sunshine days are January and December (19.4 days).
The month with the least sunshine days is May (11.8 days).

Average UV index in December
Philadelphia, MO

Average UV index in December - Philadelphia, MO
  • Average UV index in December: 2

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

Average cloud cover in December
Philadelphia, MO

Average cloud cover in December - Philadelphia, MO
  • Average cloud cover in December: 48

The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 28).

Average visibility in December
Philadelphia, MO

Average visibility in December - Philadelphia, MO
  • Average visibility in December: 6mi

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

Philadelphia, Missouri, USA

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