Average Weather In April For Melbourne, Australia

Location

This report describes the typical weather at the Melbourne Airport (Melbourne, Australia) weather station over the course of an average April. 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%).

Temperature

The month of April 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 58°F only one day in ten.

Daily High and Low Temperature in April

The daily average low (blue) and high (red) temperature with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).
Daily low temperatures range from 49°F to 52°F, falling below 43°F or exceeding 58°F only one day in ten.

Fraction of Time Spent in Various Temperature Bands in April

The average fraction of time spent in various temperature bands: frigid (below 15°F), freezing (15°F to 32°F), cold (32°F to 50°F), cool (50°F to 65°F), comfortable (65°F to 75°F), warm (75°F to 85°F), hot (85°F to 100°F) and sweltering (above 100°F).

Sun

Over the course of April, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 1:05 hours, implying an average day-over-day decrease of 2.2 minutes.

The shortest day of the month is April 30 with 10:35 hours of daylight; the longest day is April 1 with 11:39 hours of daylight.

Daily Hours of Daylight and Twilight in April

The number of hours during which the Sun is visible (black line), with various degrees of daylight, twilight, and night, indicated by the color bands. From bottom (most yellow) to top (most gray): full daylight, solar twilight (Sun is visible but less than 6° from the horizon), civil twilight (Sun is not visible but is less than 6° below the horizon), nautical twilight (Sun is between 6° and 12° below the horizon), astronomical twilight (Sun is between 12° and 18° below the horizon), and full night.

The earliest sunrise is at 6:34am on April 1; the latest sunset is at 6:14pm on April 1; the latest sunrise is at 7:00am on April 30; the earliest sunset is at 5:35pm on April 30.

Daylight savings time (DST) ends at 2:00am on April 1, 2012, shifting sunrise and sunset to an hour earlier.

Daily Sunrise & Sunset with Twilight and Daylight Savings Time in April

The solar day over the course of the year 2012 . From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (solar, civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight savings time are indicated by the "DST" labels.

Clouds

The median cloud cover ranges from 72% (partly cloudy) to 77% (partly cloudy). The trend is for the sky to be becoming cloudier with the median cloud cover increasing by 5% from the start to the end of the month.

Median Cloud Cover in April

The median daily cloud cover (black line) with percentile bands (inner band from 40th to 60th percentile, outer band from 25th to 75th percentile).

On April 15, a representative day, the sky is clear or mostly clear 23% of the time, partly cloudy 20% of the time, and mostly cloudy or overcast 40% of the time.

Cloud Cover Types in April

The fraction of time spent in each of the five sky cover categories. From top (most blue) to bottom (most gray), the categories are clear, mostly clear, partly cloudy, mostly cloudy, and overcast. Pink indicates missing data. Outside of the United States clear skies are often reported ambiguously, leading them to be lumped in with the missing data.

Precipitation

The average probability that some form of precipitation will be observed in a given day is 47%, with little variation over the course of the month.

Probability of Precipitation at Some Point in the Day in April

The fraction of days in which various types of precipitation are observed. If more than one type of precipitation is reported in a given day, the more severe precipitation is counted. For example, if light rain is observed in the same day as a thunderstorm, that day counts towards the thunderstorm totals. The order of severity is from the top down in this graph, with the most severe at the bottom.

Throughout April, the most common forms of precipitation are moderate rain, light rain, and drizzle.

Moderate rain is the most severe precipitation observed during 43% of those days with precipitation. It is most likely around April 28, when it is observed during 22% of all days.

Light rain is the most severe precipitation observed during 32% of those days with precipitation. It is most likely around April 30, when it is observed during 17% of all days.

Drizzle is the most severe precipitation observed during 17% of those days with precipitation. It is most likely around April 13, when it is observed during 9% of all days.

Types of Precipitation Throughout April

Relative frequency of various types of precipitation over the course of a typical April.

Snow

Either snow is exceptionally unlikely to fall at this location in April or this station does not reliably report precipitation types.

Humidity

The relative humidity typically ranges from 42% (comfortable) to 92% (very humid) over the course of a typical April, rarely dropping below 25% (dry) and reaching as high as 100% (very humid).

The air is driest around April 1, at which time the relative humidity drops below 51% (mildly humid) three days out of four; it is most humid around April 25, rising above 88% (very humid) three days out of four.

Relative Humidity in April

The average daily high (blue) and low (brown) relative humidity with percentile bands (inner bands from 25th to 75th percentile, outer bands from 10th to 90th percentile).

Dew Point

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 April, the dew point typically varies from 42°F (dry) to 54°F (very comfortable) and is rarely below 35°F (dry) or above 59°F (comfortable).

The time of the month between April 1 and April 30 is the most comfortable, with dew points that are neither too dry nor too muggy.

Dew Point in April

The daily average low (blue) and high (red) dew point with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

Wind

Over the course of April typical wind speeds vary from 2 mph to 17 mph (light air to moderate breeze), rarely exceeding 27 mph (strong breeze).

The highest average wind speed of 10 mph (gentle breeze) occurs around April 16, at which time the average daily maximum wind speed is 17 mph (moderate breeze).

The lowest average wind speed of 10 mph (gentle breeze) occurs around April 26, at which time the average daily maximum wind speed is 16 mph (moderate breeze).

Wind Speed in April

The average daily minimum (red), maximum (green), and average (black) wind speed with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).
The wind is most often out of the north (30% of the time), south (19% of the time), west (15% of the time), and south west (12% of the time). The wind is least often out of the east (1% of the time), north east (2% of the time), and south east (4% of the time).

Wind Directions in April

The fraction of time spent with the wind blowing from the various directions over the entire year. Values do not sum to 100% because the wind direction is undefined when the wind speed is zero.

Fraction of Time Spent with Various Wind Directions in April

The fraction of time spent with the wind blowing from the various directions on a daily basis. Stacked values do not always sum to 100% because the wind direction is undefined when the wind speed is zero.