This report describes the typical weather at the Innsbruck Airport (Kranebitten Airport) (Innsbruck, Austria) weather station over the course of an average September. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Innsbruck has a humid continental climate with warm summers and no dry season. The area within 25 mi of this station is covered by forests (83%), tundra (6%), croplands (4%), shrublands (3%), and grasslands (3%).
The month of September is characterized by falling daily high temperatures, with daily highs decreasing from 71°F to 65°F over the course of the month, exceeding 81°F or dropping below 55°F only one day in ten.
Over the course of September, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1:37 hours, implying an average day-over-day decrease of 3.2 minutes.
The shortest day of the month is September 30 with 11:43 hours of daylight; the longest day is September 1 with 13:20 hours of daylight.
The earliest sunrise is at 6:34am on September 1; the latest sunset is at 7:54pm on September 1; the latest sunrise is at 7:13am on September 30; the earliest sunset is at 6:56pm on September 30.
Daylight savings time is observed in 2012 but it neither starts nor ends in September, so the entire month is in daylight time.
The median cloud cover is 64% (partly cloudy) and does not vary substantially over the course of the month.
On September 15, a representative day, the sky is clear or mostly clear 35% of the time, partly cloudy 23% of the time, and mostly cloudy or overcast 36% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around September 1, occurring in 60% of days. Precipitation is least likely around September 30, occurring in 50% of days.
Throughout September, the most common forms of precipitation are moderate rain, thunderstorms, and light rain.
Moderate rain is the most severe precipitation observed during 58% of those days with precipitation. It is most likely around September 25, when it is observed during 33% of all days.
Thunderstorms are the most severe precipitation observed during 18% of those days with precipitation. They are most likely around September 1, when it is observed during 16% of all days.
Light rain is the most severe precipitation observed during 14% of those days with precipitation. It is most likely around September 28, when it is observed during 8% of all days.
Either snow is exceptionally unlikely to fall at this location in September or this station does not reliably report precipitation types.
The relative humidity typically ranges from 48% (comfortable) to 97% (very humid) over the course of a typical September, rarely dropping below 33% (comfortable) and reaching as high as 100% (very humid).
The air is driest around September 12, at which time the relative humidity drops below 55% (mildly humid) three days out of four; it is most humid around September 18, 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 September, the dew point typically varies from 42°F (dry) to 56°F (comfortable) and is rarely below 34°F (dry) or above 62°F (mildy humid).
The time of the month between September 1 and September 30 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of September typical wind speeds vary from 0 mph to 9 mph (calm to gentle breeze), rarely exceeding 16 mph (moderate breeze).
The highest average wind speed of 4 mph (light breeze) occurs around September 28, at which time the average daily maximum wind speed is 8 mph (gentle breeze).
The lowest average wind speed of 3 mph (light air) occurs around September 11, at which time the average daily maximum wind speed is 9 mph (gentle breeze).