December weather forecast
Defiance, PA

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Weather in December

December, the first month of the winter in Defiance, is also an icy month, with temperature in the range of an average high of 38.5°F (3.6°C) and an average low of 27.3°F (-2.6°C).

Temperature

Defiance's progression into December involves a drop in the average high-temperature, receding from a frosty 48°F (8.9°C) in November to an icy 38.5°F (3.6°C). Defiance, during December nights, observes an average temperature of 27.3°F (-2.6°C).

Humidity

The average relative humidity in December is 81%.

Rainfall

In Defiance, in December, it is raining for 10.2 days, with typically 1.57" (40mm) of accumulated precipitation. Throughout the year, there are 146.6 rainfall days, and 19.84" (504mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, October through December. In Defiance, in December, snow falls for 6.7 days, with typically accumulated 2.2" (56mm) of snow. Throughout the year, there are 37.4 snowfall days, and 14.61" (371mm) 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 December, sunrise is at 7:16 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:57 pm EST.

Sunshine

In December, the average sunshine is 4.4h.

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 reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the average person.
Note: A daily high UV index of 2 in December leads to these guidelines:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Updated: Aug 20, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it cold during December?

The high-temperature, in December, in Defiance, records 38.5°F (3.6°C), while the low-temperature is 27.3°F (-2.6°C). The average heat index (a.k.a. 'real feel', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in July is computed to be 89.6°F (32°C).

What is the average humidity in December?

In December, the average relative humidity is 81%.

How many days does it rain in December?

In December, the rain falls for 10.2 days. Throughout December, 1.57" (40mm) of precipitation is accumulated.

How much does it snow in December?

In Defiance, in December, snow falls for 6.7 days, with typically accumulated 2.2" (56mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 24min of daylight.

How many hours of daylight does Defiance have in December?

In Defiance, 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 7:16 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:57 pm EST.

How many hours of sunshine does Defiance have in December?

The average sunshine duration in December is 4.4h.

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 reading in December?

In Defiance, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents 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
Defiance, PA

Average temperature in December - Defiance, PA
  • Average high temperature in December: 38.5°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 (32.5°F).

  • Average low temperature in December: 27.3°F

The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).

Average pressure in December
Defiance, PA

Average pressure in December - Defiance, PA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in December
Defiance, PA

Average wind speed in December - Defiance, PA
  • Average wind speed in December: 7.6mph

The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

Average humidity in December
Defiance, PA

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

The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are April and July (76%).

Average rainfall in December
Defiance, PA

Average rainfall in December - Defiance, PA
  • Average rainfall in December: 1.57"

The wettest month (with the highest rainfall) is May (2.36").
The driest month (with the least rainfall) is November (1.18").

Average rainfall days in December
Defiance, PA

Average rainfall days in December - Defiance, PA
  • Average rainfall days in December: 10.2 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (7.5 days).

Average snowfall in December
Defiance, PA

Average snowfall in December - Defiance, PA
  • Average snowfall in December: 2.2"

The month with the highest snowfall is February (3.74").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Defiance, PA

Average snowfall days in December - Defiance, PA
  • Average snowfall days in December: 6.7 days

The month with the highest number of snowfall days is January (10.9 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
Defiance, PA

Average daylight in December / Average sunshine in December - Defiance, 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 2min

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 12min).

Average sunshine days in December
Defiance, PA

Average sunshine days in December - Defiance, PA
  • Average sunshine days in December: 16.8 days

The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (11 days).

Average UV index in December
Defiance, PA

Average UV index in December - Defiance, 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
Defiance, PA

Average cloud cover in December - Defiance, PA
  • Average cloud cover in December: 54

The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is July (Cloud cover 33).

Average visibility in December
Defiance, PA

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

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

Defiance, Pennsylvania, USA

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