December weather forecastHarper, KY
December
Weather in December
The first month of the winter, December, is still a chilly month in Harper, Kentucky, with an average temperature varying between 33.1°F (0.6°C) and 45.1°F (7.3°C).Temperature
The move into December indicates a slight reduction in the average high-temperature, down from November's fresh 53.8°F (12.1°C) to a chilly 45.1°F (7.3°C). In Harper, the expected average low-temperature for December is a cold 33.1°F (0.6°C).Humidity
The months with the highest humidity are February and December, with an average relative humidity of 80%.Rainfall
In Harper, in December, it is raining for 13.1 days, with typically 3.27" (83mm) of accumulated precipitation. Throughout the year, there are 178.7 rainfall days, and 34.8" (884mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Harper, in December, snow falls for 7.6 days, with typically accumulated 2.95" (75mm) of snow. In Harper, during the entire year, snow falls for 37.5 days and aggregates up to 15.43" (392mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 7:30 am and sunset at 5:14 pm. On the last day of the month, sunrise is at 7:48 am and sunset at 5:24 pm EST.
Sunshine
In December, the average sunshine is 4.4h.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Harper, KY
- Average high temperature in December: 45.1°F
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (40.1°F).
- Average low temperature in December: 33.1°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).
Average pressure in December
Harper, 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
Harper, KY
- Average wind speed in December: 6.4mph
The windiest months (with the highest average wind speed) are January and February (6.9mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in December
Harper, KY
- Average humidity in December: 80%
The months with the highest relative humidity are February and December (80%).
The months with the lowest relative humidity are August and November (74%).
Average rainfall in December
Harper, KY
- Average rainfall in December: 3.27"
The wettest month (with the highest rainfall) is February (3.7").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in December
Harper, KY
- Average rainfall days in December: 13.1 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is November (11.6 days).
Average snowfall in December
Harper, KY
- Average snowfall in December: 2.95"
The month with the highest snowfall is February (4.25").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Harper, KY
- Average snowfall days in December: 7.6 days
The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Harper, KY
- Average daylight in December: 9h and 36min
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 24min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Harper, KY
- Average sunshine days in December: 12 days
The month with the most sunshine days is October (15.9 days).
The month with the least sunshine days is February (9.3 days).
Average UV index in December
Harper, 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
Harper, KY
- Average cloud cover in December: 55
The months with the most cloud cover are January and February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Harper, KY
- Average visibility in December: 5mi
The months with the highest visibility are April, June, August, October and November (6mi).
The months with the lowest visibility are January, February, March, May, July, September and December (5mi).
