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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Southern Focus 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 heading out, as Constitution Hill’s elevated position in Sydney’s Hills District means conditions can shift quickly, especially in the afternoon.
What makes Constitution Hill’s weather different?
Constitution Hill sits on a ridge roughly 100 metres above sea level, which gives it slightly cooler temperatures and more wind than lower parts of Sydney. The area’s proximity to the Hawkesbury River and Cumberland Plain can also funnel moisture, making summer storms more likely than in the city centre.
- Summer: Warm to hot, with average highs around 28–30°C. Afternoon thunderstorms are common from November to February.
- Winter: Cool and mostly dry, with overnight lows often dropping to 5–8°C. Frost is rare but possible on clear, calm mornings.
- Spring and autumn: Mild and changeable, with occasional westerly winds bringing warmer, drier spells.
- Rainfall: Annual average is about 800–900 mm, with most rain falling in late summer and early autumn.
How to stay weather-ready in Constitution Hill
Because the suburb is exposed to the west, afternoon sea breezes can arrive later than in coastal areas, so keep an eye on the live forecast for wind changes. During summer storms, flash flooding can occur in low-lying streets near Toongabbie Creek.
- Check the Bureau of Meteorology’s Sydney warnings page for severe thunderstorm alerts.
- If you’re commuting via the M2 or Windsor Road, fog can reduce visibility on winter mornings.
- For broader NSW conditions, see our Australia weather hub or Sydney Weather page.
Does Constitution Hill get much wind?
Yes, the ridge-top location means it’s often breezier than nearby suburbs like Parramatta or Wentworthville. Westerly winds in spring can gust over 40 km/h, especially in the afternoon.
Is Constitution Hill prone to bushfires?
While the suburb itself is mostly urban, the nearby bushland reserves (such as the Cumberland State Forest) can pose a risk on hot, dry days. Check the Rural Fire Service’s fire danger ratings from October to March.
What’s the best time to visit Constitution Hill?
Autumn (March to May) offers the most comfortable weather—mild days around 22–25°C, lower humidity, and fewer storms. Spring can also be pleasant but windier.