Home › Weather › Rossmore Weather
Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Coast Pulse 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 ·
Check the live forecast above before planning your day – Rossmore’s weather can shift quickly between summer heat and winter chill, and afternoon storms are common in spring and summer.
What is the typical weather pattern for Rossmore?
Rossmore sits in Sydney’s far south-west, about 55 kilometres from the coast, so it often feels warmer than the city in summer and cooler in winter.
- Summer (Dec–Feb): average maximums of 29–32°C; afternoon thunderstorm risk, especially with a westerly change.
- Winter (Jun–Aug): calm mornings, fog possible near the Georges River; daytime highs average 16–18°C.
- Spring/autumn: mild, with occasional east-coast lows bringing prolonged rainfall.
- Rainfall at Rossmore is moderate: around 800–900 mm annually, spread fairly evenly but slightly drier in late winter.
How reliable is the Rossmore weather radar, and where should I look?
The nearest operational radar is Sydney (Terrey Hills) – about 55 km north-east – so Rossmore sits near the edge of its coverage, meaning light drizzle or shallow showers may not be fully detected.
- For real-time precipitation, use the BOM Sydney radar loop, but adjust for distance: small cells can appear weaker than they are.
- A local alternative is the Weatherzone radar, which composites multiple sites and sometimes shows finer detail over the south-west.
- rossmore weather hourly forecasts from the BOM are reliable for short-term trends, but always cross-check with the live forecast above.
Does Rossmore get more rain than nearby Penrith or Camden?
Rainfall totals are very similar to Camden (both sit in a rain shadow east of the Blue Mountains). Penrith is slightly drier, averaging 700–800 mm a year. Rossmore’s position near the Georges River can produce isolated heavier falls during storms.
Is Rossmore affected by heatwaves from the west?
Yes. When north-westerly winds develop, hot inland air flows over the Blue Mountains, pushing temperatures 3–6°C higher than in eastern Sydney. Heatwaves are most intense from December to February, and the live forecast above will show any extreme heat warnings.
Should I check Sydney weather or Wollongong weather for Rossmore?
Neither is ideal – Sydney’s coastal influence and Wollongong’s escarpment weather differ significantly. Use Penrith observations or the Badgerys Creek BOM site for the most local data. That said, Sydney weather trends can indicate approaching southerly changes that reach Rossmore about 2–3 hours later.
Sources
For broader NSW conditions, see our Australia weather hub, Sydney Weather page, and Penrith Weather for nearby comparisons. If severe storms approach, our Severe Weather Warning page provides real-time alerts.