Castle Hill

What is the climate like in Castle Hill?

The best time to visit Castle Hill is typically April – February, with trip comfort peaking in September (7.8/10). Castle Hill is warmest in January, when daily highs average 83°F (29°C), and coolest in July, when lows fall to about 45°F (7°C). The wettest month is typically March and the driest is September; the year sees roughly 33 in (833 mm) of precipitation.

• Best time to visitApril – February — comfort peaks in September (7.8/10)
• Warmest monthJanuary — average high 83°F (29°C)
• Coolest monthJuly — average low 45°F (7°C)
• Wettest monthMarch (5.3 in (134 mm))
• Driest monthSeptember (1.8 in (45 mm))
• Annual precipitation33 in (833 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromParramatta North (masons Drive, 7 km away (1967-2026)