This report describes the typical weather at the Kingston/Norman Rogers Airport (Kingston, Ontario, Canada) weather station over the course of an average January. It is based on the historical records from 1982 to 2012. Earlier records are either unavailable or unreliable.
Kingston, Ontario has a humid continental climate with warm summers and no dry season. The area within 25 mi of this station is covered by forests (57%), oceans and seas (36%), croplands (4%), and lakes and rivers (3%).
The month of January is characterized by gradually falling daily high temperatures, with daily highs ranging from 29°F to 26°F over the course of the month, exceeding 41°F or dropping below 9°F only one day in ten.
Over the course of January, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 51 minutes, implying an average day-over-day increase of 1.7 minutes.
The shortest day of the month is January 1 with 8:57 hours of daylight; the longest day is January 31 with 9:48 hours of daylight.
The earliest sunrise is at 7:26am on January 31; the latest sunset is at 5:14pm on January 31; the latest sunrise is at 7:43am on January 4; the earliest sunset is at 4:39pm on January 1.
Daylight savings time is observed in 2012 but it neither starts nor ends in January, so the entire month is in standard time.
The median cloud cover is 90% (mostly cloudy) and does not vary substantially over the course of the month.
On January 16, a representative day, the sky is clear or mostly clear 12% of the time, partly cloudy 11% of the time, and mostly cloudy or overcast 54% of the time.
The average probability that some form of precipitation will be observed in a given day is 68%, with little variation over the course of the month.
Throughout January, the most common forms of precipitation are light snow, moderate snow, and light rain.
Light snow is the most severe precipitation observed during 64% of those days with precipitation. It is most likely around January 17, when it is observed during 45% of all days.
Moderate snow is the most severe precipitation observed during 14% of those days with precipitation. It is most likely around January 10, when it is observed during 10% of all days.
Light rain is the most severe precipitation observed during 12% of those days with precipitation. It is most likely around January 1, when it is observed during 9% of all days.
The likelihood of snow falling is highest around January 17, occurring in 58% of days.
Accumulation at this location in January is unlikely. The chances of there being snow on the ground are highest around January 31, occurring 30% of the time.
The snow is typically at its deepest on January 29, with a median depth of 4.9"; the depth exceeds 11.1" only one year out of ten.
The relative humidity typically ranges from 60% (mildly humid) to 94% (very humid) over the course of a typical January, rarely dropping below 42% (comfortable) and reaching as high as 100% (very humid).
The air is driest around January 31, at which time the relative humidity drops below 69% (mildly humid) three days out of four; it is most humid around January 2, rising above 90% (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 January, the dew point typically varies from 4°F (dry) to 23°F (dry) and is rarely below -17°F (dry) or above 37°F (dry).
Over the course of January typical wind speeds vary from 3 mph to 17 mph (light air to moderate breeze), rarely exceeding 26 mph (strong breeze).
The highest average wind speed of 11 mph (gentle breeze) occurs around January 1, at which time the average daily maximum wind speed is 17 mph (moderate breeze).
The lowest average wind speed of 10 mph (gentle breeze) occurs around January 29, at which time the average daily maximum wind speed is 16 mph (moderate breeze).