This report describes the typical weather at the Boone/Watauga (Boone, North Carolina, United States) weather station over the course of an average December. It is based on the historical records from 2001 to 2012. Earlier records are either unavailable or unreliable.
Boone, North Carolina has a mild humid temperate climate with warm summers and no dry season. The area within 25 mi of this station is covered by forests (99%).
The month of December is characterized by gradually falling daily high temperatures, with daily highs ranging from 49°F to 45°F over the course of the month, exceeding 61°F or dropping below 32°F only one day in ten.
Over the course of December, the length of the day is essentially constant. The shortest day of the month is December 26 with 9:42 hours of daylight; the longest day is December 1 with 9:52 hours of daylight.
The earliest sunrise is at 7:20am on December 1; the latest sunset is at 5:23pm on December 31; the latest sunrise is at 7:38am on December 30; the earliest sunset is at 5:11pm on December 8.
Daylight saving time is observed in 2012 but it neither starts nor ends in December, so the entire month is in standard time.
The median cloud cover ranges from 42% (partly cloudy) to 55% (partly cloudy). The trend is for the sky to be becoming cloudier with the median cloud cover increasing by 12% from the start to the end of the month.
On December 1, the clearest day of the month, the sky is clear, mostly clear, or partly cloudy 56% of the time, and overcast or mostly cloudy 44% of the time.
On December 28, the cloudiest day of the month, the sky is overcast, mostly cloudy, or partly cloudy 54% of the time, and clear or mostly clear 42% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around December 25, occurring in 56% of days. Precipitation is least likely around December 1, occurring in 49% of days.
Throughout December, the most common forms of precipitation are light snow, moderate rain, moderate snow, and heavy rain.
Light snow is the most severe precipitation observed during 33% of those days with precipitation. It is most likely around December 25, when it is observed during 21% of all days.
Moderate rain is the most severe precipitation observed during 23% of those days with precipitation. It is most likely around December 5, when it is observed during 14% of all days.
Moderate snow is the most severe precipitation observed during 15% of those days with precipitation. It is most likely around December 31, when it is observed during 10% of all days.
Heavy rain is the most severe precipitation observed during 13% of those days with precipitation. It is most likely around December 2, when it is observed during 8% of all days.
The likelihood of snow falling is highest around December 31, occurring in 32% of days.
Either snow rarely accumulates at this location in December or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 47% (comfortable) to 90% (very humid) over the course of a typical December, rarely dropping below 23% (dry) and reaching as high as 100% (very humid).
The air is driest around December 30, at which time the relative humidity drops below 61% (mildly humid) three days out of four; it is most humid around December 1, rising above 86% (very humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a typical December, the dew point typically varies from 17°F (dry) to 37°F (dry) and is rarely below 4°F (dry) or above 53°F (very comfortable).
Over the course of December typical wind speeds vary from 0 mph to 21 mph (calm to fresh breeze), rarely exceeding 32 mph (high wind).
The highest average wind speed of 10 mph (gentle breeze) occurs around December 30, at which time the average daily maximum wind speed is 21 mph (fresh breeze).
The lowest average wind speed of 8 mph (gentle breeze) occurs around December 1, at which time the average daily maximum wind speed is 16 mph (moderate breeze).