This report describes the typical weather at the Tribhuvan International Airport (Kathmandu, Nepal) weather station over the course of an average October. It is based on the historical records from 2008 to 2012. Earlier records are either unavailable or unreliable.
Kathmandu has a warm temperate climate with dry winters and hot summers. The area within 25 mi of this station is covered by grasslands (69%), croplands (19%), forests (7%), and shrublands (6%).
The month of October is characterized by falling daily high temperatures, with daily highs ranging from 82°F to 76°F over the course of the month, exceeding 84°F or dropping below 73°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 47 minutes, implying an average day-over-day decrease of 1.5 minutes.
The shortest day of the month is October 31 with 11:07 hours of daylight; the longest day is October 1 with 11:54 hours of daylight.
The earliest sunrise is at 5:56am on October 1; the latest sunset is at 5:50pm on October 1; the latest sunrise is at 6:14am on October 31; the earliest sunset is at 5:20pm on October 31.
Daylight saving time (DST) is not observed in 2012.
The median cloud cover ranges from 41% (partly cloudy) to 52% (partly cloudy). The trend is for the sky to be clearing with the median cloud cover decreasing by 11% from the start to the end of the month.
On October 31, the clearest day of the month, the sky is clear, mostly clear, or partly cloudy 43% of the time, and overcast or mostly cloudy 9% of the time.
On October 1, the cloudiest day of the month, the sky is overcast, mostly cloudy, or partly cloudy 36% of the time, and clear or mostly clear 16% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around October 1, occurring in 44% of days. Precipitation is least likely around October 31, occurring in 12% of days.
Throughout October, the most common forms of precipitation are moderate rain, light rain, and thunderstorms.
Moderate rain is the most severe precipitation observed during 62% of those days with precipitation. It is most likely around October 1, when it is observed during 27% of all days.
Light rain is the most severe precipitation observed during 20% of those days with precipitation. It is most likely around October 1, when it is observed during 8% of all days.
Thunderstorms are the most severe precipitation observed during 16% of those days with precipitation. They are most likely around October 1, when it is observed during 7% 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 56% (mildly humid) to 90% (very humid) over the course of a typical October, rarely dropping below 42% (comfortable) and reaching as high as 97% (very humid).
The air is driest around October 20, at which time the relative humidity drops below 63% (mildly humid) three days out of four; it is most humid around October 23, rising above 87% (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 66°F (muggy) and is rarely below 46°F (dry) or above 68°F (muggy).
The time of the month between October 5 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 9 mph (calm to gentle breeze), rarely exceeding 10 mph (gentle breeze).
The highest average wind speed of 2 mph (light air) occurs around October 7, at which time the average daily maximum wind speed is 9 mph (gentle 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 7 mph (light breeze).