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April Weather in Perth Australia

Daily high temperatures decrease by 6°F, from 79°F to 73°F, rarely falling below 67°F or exceeding 88°F.

Daily low temperatures decrease by 5°F, from 60°F to 55°F, rarely falling below 48°F or exceeding 67°F.

For reference, on February 11, the hottest day of the year, temperatures in Perth typically range from 65°F to 86°F, while on July 18, the coldest day of the year, they range from 48°F to 63°F.

Average High and Low Temperature in April in Perth

Average High and Low Temperature in April in PerthApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303040°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°F90°F90°F95°F95°FMarMayApr 179°FApr 179°F60°F60°FApr 3073°FApr 3073°F55°F55°FApr 1177°FApr 1177°F58°F58°FApr 2175°FApr 2175°F57°F57°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on April. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in April in Perth

Average Hourly Temperature in April in PerthApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMMarMayNowNowcoldcoolcoolcomfortablewarm
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Sherman Oaks, California, United States (9,336 miles away) and Sidi Smai’il, Morocco (9,240 miles) are the far-away foreign places with temperatures most similar to Perth (view comparison).

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The month of April in Perth experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 29% throughout the month. The highest chance of overcast or mostly cloudy conditions is 31% on April 22.

The clearest day of the month is April 1, with clear, mostly clear, or partly cloudy conditions 73% of the time.

For reference, on April 22, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 31%, while on January 19, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 86%.

Cloud Cover Categories in April in Perth

Cloud Cover Categories in April in PerthApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MarMayJan 1986%Jan 1986%Apr 173%Apr 173%Apr 3069%Apr 3069%Apr 1170%Apr 1170%Apr 2169%Apr 2169%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Perth, the chance of a wet day over the course of April is very rapidly increasing, starting the month at 10% and ending it at 18%.

For reference, the year's highest daily chance of a wet day is 42% on July 21, and its lowest chance is 3% on December 29.

Probability of Precipitation in April in Perth

The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during April in Perth is increasing, starting the month at 0.9 inches, when it rarely exceeds 2.3 inches or falls below 0.1 inches, and ending the month at 1.9 inches, when it rarely exceeds 3.8 inches or falls below 0.5 inches.

Average Monthly Rainfall in April in Perth

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.

Over the course of April in Perth, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 52 minutes, implying an average daily decrease of 1 minute, 49 seconds, and weekly decrease of 12 minutes, 40 seconds.

The shortest day of the month is April 30, with 10 hours, 52 minutes of daylight and the longest day is April 1, with 11 hours, 44 minutes of daylight.

Hours of Daylight and Twilight in April in Perth

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the month in Perth is 6:28 AM on April 1 and the latest sunrise is 20 minutes later at 6:47 AM on April 30.

The latest sunset is 6:12 PM on April 1 and the earliest sunset is 33 minutes earlier at 5:39 PM on April 30.

Daylight saving time is not observed in Perth during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 5:07 AM and sets 14 hours, 15 minutes later, at 7:22 PM, while on June 20, the shortest day of the year, it rises at 7:16 AM and sets 10 hours, 3 minutes later, at 5:19 PM.

Sunrise & Sunset with Twilight in April in Perth

Sunrise & Sunset with Twilight in April in PerthApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930302 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMMarMay6:28 AM6:28 AMApr 16:12 PMApr 16:12 PM6:47 AM6:47 AMApr 305:39 PMApr 305:39 PM6:34 AM6:34 AMApr 115:59 PMApr 115:59 PMSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of April. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in April in Perth

Solar Elevation and Azimuth in April in PerthApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMMarMay001010202020303040405000010102020303030405060NowNow
northeastsouthwest
Solar elevation and azimuth over the course of April 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for April 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in April in Perth

Moon Rise, Set & Phases in April in PerthApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMMarMayMar 105:01 PMMar 105:01 PMMar 253:01 PMMar 253:01 PMApr 92:22 AMApr 92:22 AMApr 247:50 AMApr 247:50 AMMay 811:23 AMMay 811:23 AMMay 239:54 PMMay 239:54 PM5:43 AM5:43 AM6:47 PM6:47 PM6:24 PM6:24 PM7:01 AM7:01 AM6:50 AM6:50 AM6:19 PM6:19 PM5:18 PM5:18 PM6:47 AM6:47 AM6:48 AM6:48 AM5:27 PM5:27 PM4:55 PM4:55 PM7:40 AM7:40 AM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.
Apr 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
63%-12:57 PMSW10:42 PMSE5:20 AMN239,548 mi
2
50%-1:54 PMWSW11:45 PMESE6:19 AMN236,286 mi
3
41%-2:44 PMWSW-7:18 AMN232,897 mi
4
30%12:54 AMESE3:28 PMWSW-8:15 AMN229,606 mi
5
19%2:06 AMESE4:07 PMWSW-9:10 AMN226,696 mi
6
10%3:17 AMESE4:41 PMW-10:02 AMN224,468 mi
7
4%4:28 AME5:14 PMW-10:53 AMN223,198 mi
8
1%5:39 AME5:46 PMW-11:44 AMN223,076 mi
9
0%6:50 AME6:19 PMWNW-12:35 PMN224,170 mi
10
3%8:01 AMENE6:56 PMWNW-1:29 PMN226,399 mi
11
9%9:13 AMENE7:37 PMWNW-2:25 PMN229,547 mi
12
17%10:24 AMENE8:24 PMWNW-3:24 PMN233,300 mi
13
26%11:31 AMENE9:17 PMNW-4:24 PMN237,300 mi
14
36%12:30 PMNE10:15 PMNW-5:23 PMN241,200 mi
15
46%1:22 PMENE11:15 PMWNW-6:19 PMN244,711 mi
16
50%2:05 PMENE--7:11 PMN247,627 mi
17
66%-12:16 AMWNW2:41 PMENE7:58 PMN249,825 mi
18
75%-1:15 AMWNW3:12 PMENE8:42 PMN251,261 mi
19
83%-2:12 AMWNW3:39 PMENE9:22 PMN251,955 mi
20
90%-3:07 AMW4:04 PME10:01 PMN251,971 mi
21
95%-4:01 AMW4:28 PME10:40 PMN251,403 mi
22
98%-4:55 AMW4:52 PME11:19 PMN250,355 mi
23
99%-5:50 AMW5:18 PMESE--
24
100%-6:47 AMWSW5:47 PMESE12:00 AMN248,930 mi
25
100%-7:46 AMWSW6:19 PMESE12:43 AMN247,214 mi
26
97%-8:47 AMWSW6:57 PMESE1:30 AMN245,276 mi
27
92%-9:50 AMWSW7:43 PMESE2:21 AMN243,157 mi
28
86%-10:52 AMSW8:36 PMSE3:16 AMN240,887 mi
29
78%-11:49 AMSW9:37 PMESE4:13 AMN238,488 mi
30
68%-12:41 PMWSW10:44 PMESE5:11 AMN235,996 mi

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Perth is gradually decreasing during April, falling from 4% to 1% over the course of the month.

For reference, on February 14, the muggiest day of the year, there are muggy conditions 8% of the time, while on August 13, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in April in Perth

Humidity Comfort Levels in April in PerthApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%MarMayApr 14%Apr 14%Apr 301%Apr 301%Apr 113%Apr 113%Apr 212%Apr 212%NowNowhumidhumidcomfortablecomfortabledrydrymuggymuggy
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Perth is gradually decreasing during April, decreasing from 12.3 miles per hour to 11.5 miles per hour over the course of the month.

For reference, on January 23, the windiest day of the year, the daily average wind speed is 14.2 miles per hour, while on May 1, the calmest day of the year, the daily average wind speed is 11.4 miles per hour.

Average Wind Speed in April in Perth

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction in Perth throughout April is predominantly from the east, with a peak proportion of 39% on April 1.

Wind Direction in April in Perth

Wind Direction in April in PerthApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%MarMayNowNowwestsoutheastnorth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Perth is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in Perth is essentially constant during April, remaining around 72°F throughout.

Average Water Temperature in April in Perth

Average Water Temperature in April in PerthApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303068°F68°F69°F69°F70°F70°F71°F71°F72°F72°F73°F73°F74°F74°F75°F75°FMarMayApr 172°FApr 172°FApr 3071°FApr 3071°FApr 1172°FApr 1172°FApr 2172°FApr 2172°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Temperatures in Perth are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

Time Spent in Various Temperature Bands and the Growing Season in April in Perth

Time Spent in Various Temperature Bands and the Growing Season in April in PerthApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MarMay100%Apr 16100%Apr 16NowNowcoldcoolcomfortablewarmhot
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Perth are rapidly increasing during April, increasing by 475°F, from 4,288°F to 4,763°F, over the course of the month.

Growing Degree Days in April in Perth

Growing Degree Days in April in PerthApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930304,000°F4,000°F4,200°F4,200°F4,400°F4,400°F4,600°F4,600°F4,800°F4,800°F5,000°F5,000°FMarMayApr 14,288°FApr 14,288°FApr 304,763°FApr 304,763°FApr 114,468°FApr 114,468°FNowNow
The average growing degree days accumulated over the course of April, with 25th to 75th and 10th to 90th percentile bands.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Perth is decreasing during April, falling by 1.4 kWh, from 5.3 kWh to 3.9 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in April in Perth

Average Daily Incident Shortwave Solar Energy in April in PerthApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhMarMayApr 15.3 kWhApr 15.3 kWhApr 303.9 kWhApr 303.9 kWhApr 114.8 kWhApr 114.8 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

For the purposes of this report, the geographical coordinates of Perth are -31.952 deg latitude, 115.861 deg longitude, and 112 ft elevation.

The topography within 2 miles of Perth contains only modest variations in elevation, with a maximum elevation change of 325 feet and an average elevation above sea level of 66 feet. Within 10 miles also contains only modest variations in elevation (459 feet). Within 50 miles contains only modest variations in elevation (2,005 feet).

The area within 2 miles of Perth is covered by artificial surfaces (52%), sparse vegetation (19%), trees (14%), and water (13%), within 10 miles by artificial surfaces (51%) and trees (19%), and within 50 miles by water (37%) and trees (28%).

This report illustrates the typical weather in Perth, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Perth.

For each station, the records are corrected for the elevation difference between that station and Perth according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Perth is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Perth and a given station.

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Perth and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

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