St Clair in Fall
In fall (March, April and May), St Clair sees average daytime highs around 23°C and overnight lows near 12°C, with 163 mm of rain over about 23 wet days across the season. It is the 3rd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 26°C in early March to 19°C by late May. The sky is clear or mostly clear about 43% of the time across fall, and the air most often feels dry.
Fall is St Clair's 2nd-best season to visit on our travel score. For the whole year in context, see St Clair's year-round climate.
- Avg daytime high
- 23°C
- 3rd-warmest season
- Avg overnight low
- 12°C
- Rainfall
- 163 mm
- 23 wet days
- Avg wind
- 8 km/h
- Travel score
- 7.1
- 2nd-best season
- Months
- Mar · Apr · May
Temperature in St Clair in Fall
Over the season highs ease from about 26°C in early March to 19°C by late May.
A typical fall day in St Clair reaches about 23°C and drops to 12°C overnight. The warmest of the three months is March, the coolest May.
St Clair weather by month
How the three fall months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 29° / 18° | 77 | 11 | 14 | 5.5 |
| Feb | 28° / 18° | 100 | 11.4 | 13.3 | 5.9 |
| Mar | 26° / 16° | 76 | 10.9 | 12.3 | 6.7 |
| Apr | 23° / 12° | 47 | 6.8 | 11.2 | 7.5 |
| May | 20° / 9° | 41 | 5.4 | 10.3 | 7.2 |
| Jun | 17° / 7° | 55 | 6.7 | 9.8 | 6.3 |
| Jul | 17° / 5° | 31 | 4.7 | 10 | 6.5 |
| Aug | 19° / 6° | 33 | 4.6 | 10.7 | 7.3 |
| Sep | 22° / 9° | 40 | 5.7 | 11.8 | 7.6 |
| Oct | 24° / 11° | 53 | 7.6 | 12.9 | 7.5 |
| Nov | 26° / 14° | 78 | 10 | 13.8 | 6.7 |
| Dec | 27° / 16° | 75 | 10.2 | 14.2 | 6.3 |
Cloud cover in Fall
The sky is clear or mostly clear about 43% of the time across fall.
Chance of precipitation in Fall
St Clair gets around 163 mm of rain over 23 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 8 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 48 min in early March to 9 h 54 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 3.8 kWh/m².
Hazard calendar for St Clair
In fall, St Clair overlaps 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.
Is fall a good time to visit St Clair?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is one of the better times to visit St Clair for general sightseeing.
What to pack for St Clair in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, St Clair sees daytime highs around 23°C and nights near 12°C. Worth packing: light clothes, rain gear and sun protection. About 23 days see rain.
Sea temperature near St Clair in Fall
The nearest coast averages about 22°C across fall — 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 23 | 23 | 23 | 22 | 21 | 19 | 18 | 18 | 18 | 19 | 20 | 21 |
| Comfort | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Cool | Cool | Cool | Cool | Cool | Refreshing | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 23 | Refreshing |
| Feb | 23 | Refreshing |
| Mar | 23 | Refreshing |
| Apr | 22 | Refreshing |
| May | 21 | Refreshing |
| Jun | 19 | Cool |
| Jul | 18 | Cool |
| Aug | 18 | Cool |
| Sep | 18 | Cool |
| Oct | 19 | Cool |
| Nov | 20 | Refreshing |
| Dec | 21 | Refreshing |
UV index in St Clair in Fall
Clear-sky midday UV across fall averages 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 12 | 12 | 9 | 6 | 4 | 2 | 3 | 4 | 6 | 8 | 10 | 11 |
| Level | Extreme | Extreme | Very high | High | Moderate | Moderate | Moderate | Moderate | High | Very high | Very high | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 12 | Extreme |
| Feb | 12 | Extreme |
| Mar | 9 | Very high |
| Apr | 6 | High |
| May | 4 | Moderate |
| Jun | 2 | Moderate |
| Jul | 3 | Moderate |
| Aug | 4 | Moderate |
| Sep | 6 | High |
| Oct | 8 | Very high |
| Nov | 10 | Very high |
| Dec | 11 | Extreme |
Air quality in St Clair in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall 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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 11 | 7 | 7 | 8 | 8 | 6 | 6 | 8 | 10 | 10 | 25 | 49 |
| Level | Good | Good | Good | Good | Good | Good | Good | Good | Good | Good | Moderate | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 7 | Good |
| Mar | 7 | Good |
| Apr | 8 | Good |
| May | 8 | Good |
| Jun | 6 | Good |
| Jul | 6 | Good |
| Aug | 8 | Good |
| Sep | 10 | Good |
| Oct | 10 | Good |
| Nov | 25 | Moderate |
| Dec | 49 | Poor |
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.
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
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.