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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Aussie Brief Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Check the live forecast above for North Saint Marys today. This western Sydney suburb experiences a temperate climate with warm summers and mild winters, so dress for the conditions shown and plan outdoor activities accordingly.
What is the typical weather pattern for North Saint Marys?
North Saint Marys sits in Sydney’s western plains, where summer heat is more intense than near the coast. January averages 28°C, often exceeding 40°C on heatwave days. Winter minimums hover around 5°C, with frost possible in nearby low-lying areas. Rainfall is spread fairly evenly through the year, though February and March tend to be wettest due to east coast lows.
How does the weather affect daily life here?
Hot westerly winds in summer can spike fire danger, so check the Severe Weather Warning page when total fire bans are issued. Thunderstorms are common from October to March, often with heavy downpours and hail. In winter, morning fog can delay commutes on the M4 and Great Western Highway – allow extra time if a low ceiling is reported.
Does North Saint Marys get snow?
No. Snow is extremely rare in western Sydney. The nearest snowfields are in the Blue Mountains, about 40 km west, which may see light dustings once or twice a decade.
What is the best time to visit North Saint Marys for pleasant weather?
Spring (September–November) and autumn (March–May) offer mild days around 20–25°C with lower humidity. These seasons avoid the peak heat of summer and the chilly nights of winter.
Why is North Saint Marys often hotter than the city centre?
The suburb is farther from the coast, so the cooling sea breeze arrives later and weaker. Inland heat pools overnight, making minimum temperatures warmer than coastal suburbs during summer.
Sources
For more local outlooks, visit the Sydney Weather page or the Australia Weather Hub.