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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Reef Brief Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
St Clair’s weather today is typical of western Sydney’s summer pattern: hot and mostly sunny, with a chance of an afternoon storm. The live forecast above shows the current temperature and any rainfall expected.
What’s the typical weather in St Clair?
St Clair sits in western Sydney, so it gets hot summers and mild winters. Summer highs often reach the mid-30s Celsius, with humidity building before afternoon thunderstorms. Winters are cool and dry, with overnight lows around 4–8°C. Spring and autumn are transitional, with pleasant daytime temperatures and lower humidity. For a broader picture, check the Australia weather hub.
How does the weather compare to Sydney’s coast?
St Clair is about 50 kilometres inland, so it’s generally 2–5°C hotter than Sydney’s CBD in summer and a few degrees cooler on winter nights. Coastal sea breezes don’t reach here, meaning afternoon storms are more common. For coastal conditions, see Sydney Weather.
Does St Clair get extreme heat?
Yes. During heatwaves, temperatures can exceed 40°C. The Bureau of Meteorology issues severe-weather warnings when this occurs. Check Severe Weather Warning for current alerts.
Is there a weather radar for St Clair?
Yes. The Bureau of Meteorology’s Terrey Hills radar covers St Clair and most of Sydney. For live rain tracking, use the st clair weather radar feature on the BOM website or weather apps.
What’s the forecast for lake st clair weather?
Lake St Clair in Tasmania has a completely different climate—cool and wet year-round, with snow possible in winter. For St Clair, NSW, the lake is a small urban waterbody; local conditions match the town’s forecast.