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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Aussie Wire Hub Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
For the most accurate current conditions in North St Marys, check the live forecast above. This suburb in Sydney’s outer west experiences warm summers and cool, crisp winters, with the best travelling weather from late spring through early autumn.
What is the typical weather pattern in North St Marys?
North St Marys sits in a temperate climate zone, with average summer highs around 28–30°C and winter lows dropping to 5–7°C. Rainfall is spread fairly evenly through the year, though late summer and early autumn often bring the heaviest falls from afternoon storms. The area can feel a few degrees warmer than coastal suburbs due to its inland position.
When should I plan a visit or travel through North St Marys?
The most comfortable time to visit is between October and April, when days are warm and sunny. If you are travelling during school holidays, the January summer break is fine but can be hot and humid. Winter escapes are possible from June to August—pack a jacket as overnight temperatures can be quite cold, though days are often sunny and clear. For a detailed look at conditions across the region, see our Sydney Weather page.
Is North St Marys affected by severe weather?
Yes, the area can experience severe thunderstorms in summer, bringing heavy rain, hail and damaging winds. Check the Severe Weather Warning page before travelling during storm season.
How does the weather in st marys nsw compare to central Sydney?
North St Marys is typically 2–3°C cooler in summer and a few degrees colder in winter than the Sydney CBD. It also receives slightly less rainfall due to its inland location.
Where can I find the st marys weather 14 day forecast?
The live forecast above provides the latest data. For extended outlooks, the Bureau of Meteorology offers reliable 7-day predictions, while some weather apps provide a 14-day trend for weather in saint marys nsw 10 days and beyond.