December weather forecast and climate
Philadelphia, MO

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

Temperature

In December, the average high-temperature drops, from a fresh 50.9°F (10.5°C) in November, to a wintry 39.6°F (4.2°C). In December, in Philadelphia, the average low-temperature is 27.1°F (-2.7°C).

Humidity

In Philadelphia, the average relative humidity is 77%.

Rainfall

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

Snowfall

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

Daylight

December has the shortest days of the year in Philadelphia, with an average of 9.4h of daylight.

Sunshine

In December, the average sunshine is 4.9h.

UV index

Months with the lowest UV index in Philadelphia are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in December in Philadelphia?

The average high-temperature, in December, in Philadelphia, is 39.6°F (4.2°C), while the average low-temperature is 27.1°F (-2.7°C).

What is the average humidity in December in Philadelphia?

In December, the average relative humidity in Philadelphia, Missouri, 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 many days does it snow in December in Philadelphia?

In Philadelphia, Missouri, during December, snow falls for 4.5 days and regularly aggregates up to 1.54" (39mm) of snow.

What is the month with the shortest days in Philadelphia?

December has the shortest days of the year in Philadelphia, with an average of 9.4h of daylight.

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

In December, the average length of the day in Philadelphia, Missouri, is 9.4h.

How many hours of sunshine does Philadelphia have in December?

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

What are the months with the lowest UV index in Philadelphia?

Months with the lowest UV index in Philadelphia, Missouri, are January, February, November and December, with an average maximum UV index of 2.

What is the UV index reading in December in Philadelphia?

In Philadelphia, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from the exposure to the Sun's UV radiation.
Average temperature in December - Philadelphia, MO
  • Average high temperature in December: 4.2°C

The warmest month (with the highest average high temperature) is July (29.3°C).
The month with the lowest average high temperature is January (0.9°C).

  • Average low temperature in December: -2.7°C

The month with the highest average low temperature is July (19.4°C).
The coldest month (with the lowest average low temperature) is January (-6.1°C).

Average pressure in December - Philadelphia, MO
  • Average pressure in December: 1020mbar

The month with the highest atmospheric pressure is January (1021.1mbar).
The month with the lowest atmospheric pressure is June (1012.7mbar).

Average wind speed in December - Philadelphia, MO
  • Average wind speed in December: 15.4km/h

The windiest month (with the highest average wind speed) is January (16.2km/h).
The calmest month (with the lowest average wind speed) is July (10.2km/h).

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

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: 39mm

The wettest month (with the highest rainfall) is May (91mm).
The driest month (with the least rainfall) is January (33mm).

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: 39mm

The month with the highest snowfall is January (94mm).
Months with the least snowfall are May, June, July, August, September and October (0mm).

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).
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: 9.4h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 4.9h

The month with the most sunshine is July (Average sunshine: 10.4h).
The month with the least sunshine is January (Average sunshine: 4.5h).

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

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: 2

Months with the highest UV index are June, July and August (UV index 6).
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: 48

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

Average visibility in December - Philadelphia, MO
  • Average visibility in December: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).