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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 Helens Park weather is typical of Sydney’s southwestern suburbs: warm to hot summers, mild winters, and most rain falling in late summer and autumn. The live forecast above gives you the current conditions and the day ahead.
What is the typical weather pattern in St Helens Park?
Summers are warm, with average maximums around 28–30°C and occasional hot spells when north-westerly winds push temperatures into the high 30s. Winters are mild, with minimums often dropping to 4–6°C on clear nights. Rainfall is moderate, averaging about 650–700 mm a year, with February and March usually the wettest months. The area sits on the western edge of the Sydney basin, so it can feel a few degrees warmer than coastal suburbs on summer afternoons.
How does St Helens Park compare with nearby areas?
Because it is inland, St Helens Park sees more extreme temperatures than sydney weather near the coast. It is similar to narellan weather a few kilometres north, and to Campbelltown itself. By contrast, launceston weather (in Tasmania) is much cooler year-round, and st helens weather on Tasmania’s east coast is influenced by sea breezes. For current conditions in the region, check our Australia weather hub or the Sydney Weather page.
Does St Helens Park get frost in winter?
Yes, on clear winter nights temperatures can drop below 4°C, and light frost is common in low-lying parts of the suburb, especially in July and August.
What is the hottest month?
January is typically the hottest, with average daily maximums near 30°C, though heatwaves in February can push temperatures above 40°C for a day or two.
Is St Helens Park affected by severe storms?
Thunderstorms are common in spring and summer, sometimes bringing heavy rain, damaging winds, and hail. Check severe weather warnings during storm season.