Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
With December's onset, the weather reveals a slight temperature decrease, transitioning from a fresh 53.6°F (12°C) in November to a chilly 45.1°F (7.3°C). Harlan records a mean low-temperature of 32.9°F (0.5°C) in December.Humidity
In Harlan, the average relative humidity in December is 80%.Rainfall
In Harlan, Kentucky, in December, during 14.1 rainfall days, 3.62" (92mm) of precipitation is typically accumulated. In Harlan, during the entire year, the rain falls for 190.4 days and collects up to 40.28" (1023mm) of precipitation.Snowfall
Months with snowfall in Harlan are January through April, October through December. In Harlan, Kentucky, during December, snow falls for 6.8 days and regularly aggregates up to 2.87" (73mm) of snow. Throughout the year, in Harlan, Kentucky, there are 34 snowfall days, and 15.71" (399mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 42min of daylight.On the first day of the month, sunrise is at 7:28 am and sunset at 5:17 pm. On the last day of December, sunrise is at 7:45 am and sunset at 5:27 pm EST.
Sunshine
In December, the average sunshine is 4.8h.UV index
The months with the lowest UV index in Harlan, Kentucky, are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 2 during December translates into the following directions:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Harlan in December?
What is the average humidity in December in Harlan?
How much does it rain in Harlan in December?
How many days does it snow in December in Harlan?
What is the month with the shortest days in Harlan?
What is the average length of the day in December in Harlan?
When is the sunrise / sunset in December in Harlan?
How long on average sun shines in December in Harlan?
When is the lowest UV index in Harlan?
What is the UV index reading in December in Harlan?
Average temperature in December
Harlan, KY
- Average high temperature in December: 45.1°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (40.6°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).
Average pressure in December
Harlan, KY
- Average pressure in December: 30.14"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in December
Harlan, KY
- Average wind speed in December: 5.7mph
The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in December
Harlan, KY
- Average humidity in December: 80%
The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are April, June, August and November (77%).
Average rainfall in December
Harlan, KY
- Average rainfall in December: 3.62"
The wettest month (with the highest rainfall) is February (4.57").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in December
Harlan, KY
- Average rainfall days in December: 14.1 days
The month with the highest number of rainy days is July (20.1 days).
The month with the least rainy days is November (11.5 days).
Average snowfall in December
Harlan, KY
- Average snowfall in December: 2.87"
The month with the highest snowfall is January (4.21").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Harlan, KY
- Average snowfall days in December: 6.8 days
The month with the highest number of snowfall days is January (10 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
Harlan, KY
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in December
Harlan, KY
- Average sunshine days in December: 12.3 days
The month with the most sunshine days is October (15.8 days).
The month with the least sunshine days is May (9.1 days).
Average UV index in December
Harlan, KY
- Average UV index in December: 2
The months with the highest UV index are May, June 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
Harlan, KY
- Average cloud cover in December: 53
The months with the most cloud cover are January and February (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Harlan, KY
- 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).
Harlan, Kentucky, USA
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