St Clair weather in April

In April, St Clair sees average daytime highs of 23°C and overnight lows near 12°C, with 47 mm of rain across 6.8 wet days and about 11.2 hours of daylight. It is the 7th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 22°C by the end. The sky is clear or mostly clear about 45% of the time in April, and the air most often feels dry.

Daylight stretches from about 11 h 42 min at the start of April to 10 h 42 min by month's end. Set against the rest of the year, April is St Clair's 6th-clearest and 12th-windiest month. For the whole year in context, see St Clair's year-round climate.

Daytime high
23°
7th warmest
Overnight low
12°
7th coldest
Rainfall
47 mm
6.8 wet days
Daylight
11 h 12 min
7:22 AM – 6:32 PM
Cloud cover
48%
6th clearest
Wind
7 km/h
12th windiest
Solar energy
3.83 kWh/m²
Travel score
7.5
out of 10

St Clair is outer western suburb of Sydney, New South Wales, Australia.

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 24°C in the first days to 22°C by the end.

A typical April day in St Clair reaches about 23°C in the afternoon and slips back to 12°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 27°C. Set against its neighbours, April runs about 3°C cooler than March and about 3°C warmer than May.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12514
22413
32413
42413
52413
62413
72413
82413
92413
102412
112412
122312
132312
142312
152312
162312
172312
182312
192312
202311
212311
222311
232211
242211
252211
262211
272211
282211
292210
302210

St Clair weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 18°7711145.5
Feb28° / 18°10011.413.35.9
Mar26° / 16°7610.912.36.7
Apr23° / 12°476.811.27.5
May20° / 415.410.37.2
Jun17° / 556.79.86.3
Jul17° / 314.7106.5
Aug19° / 334.610.77.3
Sep22° / 405.711.87.6
Oct24° / 11°537.612.97.5
Nov26° / 14°781013.86.7
Dec27° / 16°7510.214.26.3

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 17% of April, with mostly cloudy or overcast conditions the remaining 38%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16040
26139
36040
46139
56139
66139
76139
86238
96238
106238
116238
126238
136238
146337
156337
166337
176337
186337
196337
206436
216337
226337
236337
246337
256238
266238
276139
286139
296238
306238

Chance of precipitation in April

Any precipitation

St Clair gets around 47 mm of rain over 6.8 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 23% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
128
228
327
426
525
625
724
823
923
1022
1122
1222
1321
1422
1522
1622
1722
1822
1923
2023
2123
2223
2323
2423
2523
2622
2722
2822
2921
3021

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 58% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13935233
24135223
34335202
44534192
54634182
64834161
74934151
85134141
95234131
105334121
115534110
125634100
135634100
14573490
15573490
16593380
17593380
18603370
19613270
20613270
21633160
22643060
23652960
24662860
25682750
26702550
27712450
28722350
29742150
30752050

Wind in April

Winds average 7 km/h in April, the calmest month.

Across April, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 11 h 42 min at the start of April to 10 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over April. Sunrise moves from 7:11 AM to 7:33 AM, and sunset from 6:52 PM to 6:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.77:116:52
211.67:126:51
311.67:126:49
411.67:136:48
511.57:146:47
611.57:156:45
711.57:156:44
811.47:166:42
911.47:176:41
1011.47:186:40
1111.37:186:38
1211.37:196:37
1311.37:206:36
1411.27:216:34
1511.27:226:33
1611.27:226:32
1711.17:236:31
1811.17:246:29
1911.17:256:28
2011.07:256:27
2111.07:266:26
2211.07:276:24
2310.97:286:23
2410.97:286:22
2510.97:296:21
2610.87:306:20
2710.87:316:19
2810.87:326:17
2910.77:326:16
3010.77:336:15

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 3.83 kWh/m².

For context, solar energy here swings from a low near 2.49 kWh/m² to a high of 6.46 kWh/m² in December across the year — April's 3.83 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.2Bright
44.2Bright
54.1Bright
64.1Bright
74.1Bright
84.1Bright
94.0Bright
104.0Bright
114.0Moderate
124.0Moderate
133.9Moderate
143.9Moderate
153.9Moderate
163.8Moderate
173.8Moderate
183.8Moderate
193.7Moderate
203.7Moderate
213.7Moderate
223.6Moderate
233.6Moderate
243.5Moderate
253.5Moderate
263.5Moderate
273.5Moderate
283.4Moderate
293.4Moderate
303.4Moderate
Planning a trip in April

Hazard calendar for St Clair

In seasonPeak

In April, St Clair sits inside its cyclone season. The full year is below, with each hazard's peak months called out.

St Clair 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 April a good time to visit St Clair?

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

7.5
Sightseeing
2nd-best month of the year
5.8
Beach & pool
7th-best month of the year

April is one of the better times to visit St Clair for general sightseeing.

What to pack for St Clair in April

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

In April, St Clair sees daytime highs around 23°C and nights near 12°C. Worth packing: light clothes. About 7 days see rain.

light clothes

Sea temperature near St Clair in April

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

The sea at the nearest coast (about 48 km away) is warmest in February at about 23°C and coldest in August near 18°C.

It's comfortable for a long swim from Nov 16 to Jun 2 — about 6.5 months when the water holds above 20°C.

16°18°20°22°24°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan23Refreshing
Feb23Refreshing
Mar23Refreshing
Apr22Refreshing
May21Refreshing
Jun19Cool
Jul18Cool
Aug18Cool
Sep18Cool
Oct19Cool
Nov20Refreshing
Dec21Refreshing

UV index in St Clair in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in St Clair peaks around January 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 17UV 12Jun 18UV 2
UV index (midday)Level
Jan12Extreme
Feb12Extreme
Mar9Very high
Apr6High
May4Moderate
Jun2Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov10Very high
Dec11Extreme

Air quality in St Clair in April

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in St Clair is worst in December — around 49 µg/m³ PM2.5 (poor), about 8.1× the cleanest month (June, 6 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorDec 1545 µg/m³Jun 236 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb7Good
Mar7Good
Apr8Good
May8Good
Jun6Good
Jul6Good
Aug8Good
Sep10Good
Oct10Good
Nov25Moderate
Dec49Poor
Location & terrain

Where is St Clair?

St Clair sits at 33.8°S, 150.8°E, 49 m above sea level, in Australia. The nearest listed city is Mount Druitt, 5.0 km away.

Topography around St Clair

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

Within 3 km, the terrain around St Clair has only modest variations in elevation — a maximum elevation change of 62 m around an average of 45 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 325 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,382 m.

The land around St Clair is covered by artificial surfaces (48%), grassland (27%) and trees (24%) within 3 km, trees (35%), grassland (32%) and artificial surfaces (28%) within 16 km, and trees (65%) and water (21%) within 80 km.

3 km
62 m
16 km
325 m
80 km
1,382 m
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Mount Druitt 5.0 km · Glenmore Park 11 km · Quakers Hill 12 km · Cranebrook 12 km · Blacktown 13 km · Seven Hills 14 km · Greystanes 15 km · Glenwood 15 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 St Clair (-33.7973°, 150.7847°, elevation 49 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).