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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Aussie Focus Hub Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Check the live forecast above for today’s conditions in Thornhill Park, then plan your day around the expected temperature, wind and any rain. This outer Melbourne suburb sits inland, so summer afternoons can feel hotter than the city centre and winter mornings often start crisp.
What weather does Thornhill Park typically see?
Thornhill Park shares the temperate climate of Melbourne weather but with a slightly wider temperature range due to its inland position, similar to nearby Melton weather.
- Summer (Dec–Feb): average maximum around 27°C, but hot northerly winds can push temperatures into the high 30s.
- Winter (Jun–Aug): average minimum around 5°C, with clear nights sometimes dropping below 2°C and light frost in low-lying areas.
- Rainfall: fairly evenly spread through the year, averaging about 550 mm annually. Spring tends to be the wettest season.
- Wind: afternoon sea breezes from Port Phillip Bay often moderate summer heat, though strong northerlies occur before cool changes.
What should I know before heading out in Thornhill Park?
Because Thornhill Park is a growing residential area (postcode 3338), many streets lack mature shade trees. Sun protection is wise from late spring to early autumn.
- UV Index: often reaches extreme levels (11+) on clear summer days between 10 am and 3 pm.
- Thunderstorms: most common in spring and early summer, occasionally bringing heavy downpours and hail.
- Bushfire risk: on extreme fire danger days, northerly winds can affect the suburb; stay alert to severe weather warnings from the Bureau.
Is Thornhill Park usually hotter or cooler than Melbourne CBD?
On summer afternoons Thornhill Park is often 2–3°C warmer than the city because it’s farther from Port Phillip Bay’s cooling breeze. In winter it can be several degrees cooler, especially overnight.
Does Thornhill Park get frost in winter?
Yes, light frost can form on clear, calm winter mornings, particularly in open paddocks and new estates. It usually clears within a few hours after sunrise.
What’s the best time of year to visit Thornhill Park?
Autumn (March–May) and spring (September–November) offer mild temperatures and lower fire risk. Summer is fine if you prepare for heat, but avoid extreme heatwave days.