December weather forecast
Blackburn, KY

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Weather in December

December, the first month of the winter in Blackburn, is also a frosty month, with an average temperature varying between 32.9°F (0.5°C) and 44.6°F (7°C).

Temperature

The start of December involves a temperature drop, moving from a fresh 54.1°F (12.3°C) in November to a frosty 44.6°F (7°C). Throughout December, Blackburn witnesses a nighttime temperature average of 32.9°F (0.5°C).

Humidity

The average relative humidity in December is 78%.

Rainfall

In Blackburn, during December, the rain falls for 10.4 days and regularly aggregates up to 2.05" (52mm) of precipitation. Throughout the year, there are 146.3 rainfall days, and 24.96" (634mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In Blackburn, during December, snow falls for 3.5 days and regularly aggregates up to 0.63" (16mm) of snow. In Blackburn, during the entire year, snow falls for 15.9 days and aggregates up to 3.58" (91mm) of snow.

Daylight

With an average of 9h and 36min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 6:49 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 4:44 pm CST.

Sunshine

In Blackburn, the average sunshine in December is 4.7h.

UV index

The months with the lowest UV index in Blackburn are January, February and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for average individuals.
Note: A maximum high daily UV index of 2 during December translates into the following directions:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.

Frequently asked questions

Is it cold during December?

In December, the average high-temperature and low-temperature are 44.6°F (7°C) and 32.9°F (0.5°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, in August is computed to be 95°F (35°C).

What is the average humidity in December?

In Blackburn, the average relative humidity in December is 78%.

How many days does it rain in December in Blackburn?

In Blackburn, in December, during 10.4 rainfall days, 2.05" (52mm) of precipitation is typically accumulated.

How many days does it snow in December?

In December, it is snowing for 3.5 days. Throughout December, 0.63" (16mm) of snow is accumulated.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 36min of daylight.

What is the average length of the day in December?

In December, the average day length is 9h and 37min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 6:49 am and sunset at 4:34 pm. On the last day of the month, in Blackburn, sunrise is at 7:07 am and sunset at 4:44 pm CST.

How long on average sun shines in December?

In December, the average sunshine duration is 4.7h.

What are the months with the lowest UV index?

The months with the lowest UV index in Blackburn are January, February and December, with an average maximum UV index of 2.

How high is the UV index in December?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to 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
Blackburn, KY

Average temperature in December - Blackburn, KY
  • Average high temperature in December: 44.6°F

The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (39.7°F).

  • Average low temperature in December: 32.9°F

The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).

Average pressure in December
Blackburn, KY

Average pressure in December - Blackburn, KY
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in December
Blackburn, KY

Average wind speed in December - Blackburn, KY
  • Average wind speed in December: 9.1mph

The windiest month (with the highest average wind speed) is February (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

Average humidity in December
Blackburn, KY

Average humidity in December - Blackburn, KY
  • Average humidity in December: 78%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (70%).

Average rainfall in December
Blackburn, KY

Average rainfall in December - Blackburn, KY
  • Average rainfall in December: 2.05"

The wettest month (with the highest rainfall) is April (3.27").
The driest month (with the least rainfall) is September (1.14").

Average rainfall days in December
Blackburn, KY

Average rainfall days in December - Blackburn, KY
  • Average rainfall days in December: 10.4 days

The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is November (9 days).

Average snowfall in December
Blackburn, KY

Average snowfall in December - Blackburn, KY
  • Average snowfall in December: 0.63"

The month with the highest snowfall is February (0.87").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Blackburn, KY

Average snowfall days in December - Blackburn, KY
  • Average snowfall days in December: 3.5 days

The month with the highest number of snowfall days is January (4.8 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
Blackburn, KY

Average daylight in December / Average sunshine in December - Blackburn, KY
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in December: 4h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

Average sunshine days in December
Blackburn, KY

Average sunshine days in December - Blackburn, KY
  • Average sunshine days in December: 17.2 days

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is May (11.2 days).

Average UV index in December
Blackburn, KY

Average UV index in December - Blackburn, KY
  • Average UV index in December: 2

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

Average cloud cover in December
Blackburn, KY

Average cloud cover in December - Blackburn, KY
  • Average cloud cover in December: 50

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 27).

Average visibility in December
Blackburn, KY

Average visibility in December - Blackburn, KY
  • 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).

Blackburn, Kentucky, USA

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