This report describes the typical weather at the Halifax Stanfield International Airport (Halifax Regional Municipality, Nova Scotia, Canada) weather station over the course of an average October. It is based on the historical records from 1993 to 2012. Earlier records are either unavailable or unreliable.
Halifax Regional Municipality, Nova Scotia has a humid continental climate with warm summers and no dry season. The area within 25 mi of this station is covered by forests (85%), oceans and seas (9%), and lakes and rivers (4%).
The month of October is characterized by rapidly falling daily high temperatures, with daily highs decreasing from 62°F to 50°F over the course of the month, exceeding 70°F or dropping below 41°F only one day in ten.
Over the course of October, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 1:30 hours, implying an average day-over-day decrease of 2.9 minutes.
The shortest day of the month is October 31 with 10:12 hours of daylight; the longest day is October 1 with 11:42 hours of daylight.
The earliest sunrise is at 7:12am on October 1; the latest sunset is at 6:54pm on October 1; the latest sunrise is at 7:51am on October 31; the earliest sunset is at 6:03pm on October 31.
Daylight savings time is observed in 2012 but it neither starts nor ends in October, so the entire month is in daylight time.
The median cloud cover ranges from 80% (mostly cloudy) to 87% (mostly cloudy). The trend is for the sky to be becoming cloudier with the median cloud cover increasing by 7% from the start to the end of the month.
On October 16, a representative day, the sky is clear or mostly clear 27% of the time, partly cloudy 10% of the time, and mostly cloudy or overcast 63% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around October 31, occurring in 59% of days. Precipitation is least likely around October 1, occurring in 50% of days.
Throughout October, the most common forms of precipitation are light rain and moderate rain.
Light rain is the most severe precipitation observed during 52% of those days with precipitation. It is most likely around October 8, when it is observed during 30% of all days.
Moderate rain is the most severe precipitation observed during 18% of those days with precipitation. It is most likely around October 23, when it is observed during 11% of all days.
The likelihood of snow falling is highest around October 31, occurring in 14% of days.
Either snow rarely accumulates at this location in October or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 61% (mildly humid) to 97% (very humid) over the course of a typical October, rarely dropping below 43% (comfortable) and reaching as high as 100% (very humid).
The air is driest around October 1, at which time the relative humidity drops below 71% (humid) three days out of four; it is most humid around October 1, rising above 94% (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 October, the dew point typically varies from 32°F (dry) to 53°F (very comfortable) and is rarely below 21°F (dry) or above 63°F (mildy humid).
Over the course of October typical wind speeds vary from 3 mph to 18 mph (light air to moderate breeze), rarely exceeding 28 mph (strong breeze).
The highest average wind speed of 11 mph (gentle breeze) occurs around October 31, at which time the average daily maximum wind speed is 18 mph (moderate breeze).
The lowest average wind speed of 10 mph (gentle breeze) occurs around October 4, at which time the average daily maximum wind speed is 16 mph (moderate breeze).