This report describes the typical weather at the Melbourne Airport (Melbourne, Australia) weather station over the course of an average year. It is based on the historical records from 1986 to 2012. Earlier records are either unavailable or unreliable.
Melbourne has a mild humid temperate climate with warm summers and no dry season. The area within 25 mi of this station is covered by croplands (50%), built-up areas (18%), forests (17%), grasslands (8%), and oceans and seas (8%).
Over the course of a year, the temperature typically varies from 42Â°F to 79Â°F and is rarely below 37Â°F or above 94Â°F.
The warm season lasts from December 20 to March 14 with an average daily high temperature above 74Â°F. The hottest day of the year is January 29, with an average high of 79Â°F and low of 58Â°F.
The cold season lasts from May 22 to September 3 with an average daily high temperature below 60Â°F. The coldest day of the year is July 18, with an average low of 42Â°F and high of 55Â°F.
The length of the day varies significantly over the course of the year. The shortest day is June 20 with 9:34 hours of daylight; the longest day is December 21 with 14:46 hours of daylight.
The earliest sunrise is at 5:49am on October 6 and the latest sunset is at 8:46pm on January 2. The latest sunrise is at 7:37am on June 28 and the earliest sunset is at 5:08pm on June 13.
Daylight savings time (DST) is observed in this location during 2012, starting in the spring on October 7 and ending in the fall on April 1.
The median cloud cover ranges from 71% (partly cloudy) to 82% (mostly cloudy). The sky is cloudiest on June 2 and clearest on February 11. The clearer part of the year begins around July 30. The cloudier part of the year begins around April 25.
On February 11, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 44% of the time, and overcast or mostly cloudy 36% of the time.
On June 2, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 69% of the time, and clear or mostly clear 19% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around August 29, occurring in 60% of days. Precipitation is least likely around January 28, occurring in 41% of days.
Over the entire year, the most common forms of precipitation are moderate rain, light rain, and drizzle.
Moderate rain is the most severe precipitation observed during 44% of those days with precipitation. It is most likely around September 1, when it is observed during 32% of all days.
Light rain is the most severe precipitation observed during 33% of those days with precipitation. It is most likely around July 19, when it is observed during 22% of all days.
Drizzle is the most severe precipitation observed during 14% of those days with precipitation. It is most likely around February 29, when it is observed during 10% of all days.
During the warm season, which lasts from December 20 to March 14, there is a 44% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of moderate rain (35% of days with precipitation have at worst moderate rain), light rain (32%), drizzle (20%), and thunderstorms (13%).
During the cold season, which lasts from May 22 to September 3, there is a 58% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of moderate rain (49% of days with precipitation have at worst moderate rain), light rain (36%), and drizzle (12%).
Either snow is exceptionally unlikely to fall at any time during the year at this location or this station does not reliably report precipitation types.
The relative humidity typically ranges from 37% (comfortable) to 94% (very humid) over the course of the year, rarely dropping below 17% (dry) and reaching as high as 100% (very humid).
The air is driest around January 18, at which time the relative humidity drops below 47% (comfortable) three days out of four; it is most humid around June 16, exceeding 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 year, the dew point typically varies from 36Â°F (dry) to 58Â°F (comfortable) and is rarely below 30Â°F (dry) or above 65Â°F (mildy humid).
There are two periods in the year that are most comfortable: The first is between January 1 and May 12 and the second is between October 24 and December 31. The air feels neither too dry nor too muggy during these periods.
Over the course of the year typical wind speeds vary from 2 mph to 22 mph (light air to fresh breeze), rarely exceeding 33 mph (high wind).
The highest average wind speed of 13 mph (moderate breeze) occurs around September 18, at which time the average daily maximum wind speed is 22 mph (fresh breeze).
The lowest average wind speed of 10 mph (gentle breeze) occurs around May 7, at which time the average daily maximum wind speed is 16 mph (moderate breeze).