This report describes the typical weather at the Chengdu Shuangliu International Airport (Chengdu, China) weather station over the course of an average October. It is based on the historical records from 1997 to 2012. Earlier records are either unavailable or unreliable.
Chengdu has a warm temperate climate with dry winters and hot summers. The area within 25 mi of this station is covered by croplands (77%), grasslands (18%), and shrublands (2%).
The month of October is characterized by falling daily high temperatures, with daily highs decreasing from 74°F to 67°F over the course of the month, exceeding 82°F or dropping below 61°F only one day in ten.
Over the course of October, the length of the day is gradually decreasing. From the start to the end of the month, the length of the day decreases by 53 minutes, implying an average day-over-day decrease of 1.7 minutes.
The shortest day of the month is October 31 with 10:59 hours of daylight; the longest day is October 1 with 11:51 hours of daylight.
The earliest sunrise is at 6:58am on October 1; the latest sunset is at 6:49pm on October 1; the latest sunrise is at 7:18am on October 31; the earliest sunset is at 6:17pm on October 31.
Daylight saving time (DST) is not observed in 2012.
The median cloud cover is 83% (mostly cloudy) and does not vary substantially over the course of the month.
On October 16, a representative day, the sky is clear or mostly clear 12% of the time, partly cloudy 25% of the time, and mostly cloudy or overcast 51% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around October 2, occurring in 66% of days. Precipitation is least likely around October 31, occurring in 54% 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 79% of those days with precipitation. It is most likely around October 2, when it is observed during 50% of all days.
Moderate rain is the most severe precipitation observed during 16% of those days with precipitation. It is most likely around October 1, when it is observed during 12% of all days.
Either snow is exceptionally unlikely to fall at this location in October or this station does not reliably report precipitation types.
The relative humidity typically ranges from 60% (mildly humid) to 94% (very humid) over the course of a typical October, rarely dropping below 45% (comfortable) and reaching as high as 99% (very humid).
The air is driest around October 23, at which time the relative humidity drops below 69% (mildly humid) three days out of four; it is most humid around October 1, rising above 93% (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 51°F (very comfortable) to 65°F (mildy humid) and is rarely below 44°F (dry) or above 69°F (muggy).
The time of the month between October 1 and October 31 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of October typical wind speeds vary from 0 mph to 6 mph (calm to light breeze), rarely exceeding 10 mph (gentle breeze).
The highest average wind speed of 3 mph (light air) occurs around October 1, at which time the average daily maximum wind speed is 6 mph (light breeze).
The lowest average wind speed of 2 mph (light air) occurs around October 30, at which time the average daily maximum wind speed is 6 mph (light breeze).