Ballajura weather in May

In May, Ballajura sees average daytime highs of 21°C and overnight lows near 11°C, with 54 mm of rain across 6.9 wet days and about 10.4 hours of daylight. It is the 8th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 20°C by the end. The sky is clear or mostly clear about 43% of the time in May, and the air most often feels dry.

Daylight stretches from about 10 h 48 min at the start of May to 10 h 06 min by month's end. Set against the rest of the year, May is Ballajura's 8th-clearest and 12th-windiest month. For the whole year in context, see Ballajura's year-round climate.

Daytime high
21°
8th warmest
Overnight low
11°
6th coldest
Rainfall
54 mm
6.9 wet days
Daylight
10 h 24 min
7:01 AM – 5:24 PM
Cloud cover
47%
8th clearest
Wind
12 km/h
12th windiest
Solar energy
3.23 kWh/m²
Travel score
7.2
out of 10

Ballajura is suburb of Perth, Western Australia.

Density
2,074/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 23°C in the first days to 20°C by the end.

A typical May day in Ballajura reaches about 21°C in the afternoon and slips back to 11°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 25°C. Set against its neighbours, May runs about 4°C cooler than April and about 3°C warmer than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12313
22313
32313
42313
52312
62312
72212
82212
92212
102212
112212
122212
132212
142111
152111
162111
172111
182111
192111
202111
212111
222011
232011
242011
252011
262010
272010
282010
292010
302010
311910

Ballajura weather by month

How May compares with the rest of the year at a glance. May is the 8th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 18°202.313.85.4
Feb32° / 19°171.813.25.4
Mar29° / 17°192.812.26.7
Apr25° / 15°243.911.28.0
May21° / 11°546.910.47.2
Jun18° / 739.4106.2
Jul17° / 8310.910.15.6
Aug18° / 7310.210.85.9
Sep19° / 49811.86.6
Oct23° / 11°264.612.87.9
Nov26° / 14°193.713.68.0
Dec30° / 17°111.9146.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 20% of May, with mostly cloudy or overcast conditions the remaining 36%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16634
26634
36634
46535
56535
66535
76535
86436
96436
106436
116436
126436
136535
146436
156436
166535
176535
186535
196436
206436
216337
226337
236337
246337
256238
266238
276139
286139
296040
306040
316040

Chance of precipitation in May

Any precipitation

Ballajura gets around 54 mm of rain over 6.9 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 22% and peaks near 25% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
116
217
317
418
518
619
719
820
921
1021
1122
1222
1323
1423
1523
1624
1724
1824
1924
2024
2124
2224
2325
2425
2525
2625
2725
2825
2925
3025
3125

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the dry band about 80% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
174224
274224
375214
475214
575214
675214
775214
876213
976213
1076213
1177203
1277203
1378202
1479192
1579192
1680182
1780182
1882171
1982171
2083161
2183161
2284151
2384151
2485141
2585141
2686131
2786131
2887121
2987121
3087121
3189110

Wind in May

Winds average 12 km/h in May, the calmest month.

Across May, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 10 h 48 min at the start of May to 10 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over May. Sunrise moves from 6:51 AM to 7:11 AM, and sunset from 5:37 PM to 5:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.86:515:37
210.76:515:36
310.76:525:35
410.76:535:34
510.76:535:33
610.66:545:32
710.66:555:31
810.66:565:30
910.66:565:29
1010.56:575:29
1110.56:585:28
1210.56:585:27
1310.56:595:26
1410.47:005:25
1510.47:015:25
1610.47:015:24
1710.47:025:23
1810.37:035:23
1910.37:035:22
2010.37:045:22
2110.37:055:21
2210.37:055:20
2310.27:065:20
2410.27:075:19
2510.27:075:19
2610.27:085:18
2710.27:095:18
2810.17:095:18
2910.17:105:17
3010.17:105:17
3110.17:115:17

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.23 kWh/m².

For context, solar energy here swings from a low near 2.6 kWh/m² to a high of 8.37 kWh/m² in December across the year — May's 3.23 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.8Moderate
23.7Moderate
33.7Moderate
43.6Moderate
53.6Moderate
63.6Moderate
73.5Moderate
83.5Moderate
93.5Moderate
103.4Moderate
113.4Moderate
123.4Moderate
133.3Moderate
143.3Moderate
153.3Moderate
163.2Moderate
173.2Moderate
183.2Moderate
193.1Moderate
203.1Moderate
213.1Moderate
223.0Moderate
233.0Moderate
243.0Moderate
253.0Moderate
262.9Moderate
272.9Moderate
282.9Moderate
292.9Moderate
302.9Moderate
312.8Moderate
Planning a trip in May

Hazard calendar for Ballajura

In seasonPeak

None of Ballajura's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Ballajura sits in the South Indian Ocean cyclone belt; the season peaks January–March.

Cyclone
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Ballajura?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

7.2
Sightseeing
4th-best month of the year
4.6
Beach & pool
8th-best month of the year

May is one of the better times to visit Ballajura for general sightseeing.

What to pack for Ballajura in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, Ballajura sees daytime highs around 21°C and nights near 11°C. Little to plan around — just the basics. About 7 days see rain.

Sea temperature near Ballajura in May

The nearest coast averages about 22°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 26 km away) is warmest in February at about 22°C and coldest in September near 19°C.

It's comfortable for a long swim from Nov 22 to Jul 12 — about 7.7 months when the water holds above 20°C.

18°20°22°24°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingcomfortable to swim
Sea temperature (°C)Comfort
Jan22Refreshing
Feb22Refreshing
Mar22Refreshing
Apr22Refreshing
May22Refreshing
Jun21Refreshing
Jul20Cool
Aug19Cool
Sep19Cool
Oct19Cool
Nov20Cool
Dec21Refreshing

UV index in Ballajura in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ballajura peaks around December 23 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeModerateVery highExtremeDec 23UV 13Jun 21UV 3
UV index (midday)Level
Jan13Extreme
Feb12Extreme
Mar11Extreme
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug5Moderate
Sep8Very high
Oct9Very high
Nov10Extreme
Dec13Extreme

Air quality in Ballajura in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Ballajura is worst in May — around 17 µg/m³ PM2.5 (moderate), about 4.9× the cleanest month (December, 4 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 1416 µg/m³Dec 184 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb5Good
Mar4Good
Apr11Good
May17Moderate
Jun5Good
Jul5Good
Aug6Good
Sep11Good
Oct11Good
Nov6Good
Dec4Good
Location & terrain

Where is Ballajura?

Ballajura sits at 31.8°S, 115.9°E, 40 m above sea level, in Australia. The nearest listed city is Landsdale, 5.0 km away.

Topography around Ballajura

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ballajura.

Within 3 km, the terrain around Ballajura has only modest variations in elevation — a maximum elevation change of 70 m around an average of 42 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 232 m; within 80 km, significant variations in elevation — a maximum elevation change of 567 m.

The land around Ballajura is covered by artificial surfaces (50%) and trees (24%) within 3 km, artificial surfaces (43%), trees (24%) and grassland (20%) within 16 km, and trees (39%) and water (29%) within 80 km.

3 km
70 m
16 km
232 m
80 km
567 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Landsdale 5.0 km · Morley 5.0 km · Dianella 6.0 km · Ellenbrook 11 km · Duncraig 11 km · Perth 13 km · Scarborough 14 km · Willetton 24 km

Australia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type I
230 V · 50 Hz
Prices
≈ 90% of US
price level, 2025
GDP per capita
$65,130
2025
Happiness
6.9 / 10
World Happiness, 2025
Homicide rate
0.9
per 100k, 2023
Road deaths
4.9
per 100k/yr, 2019
Income group
High
World Bank
Religion
none 38%Roman Catholic 20%Protestant 18%other Christian 4%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Ballajura (-31.8406°, 115.8955°, elevation 40 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).