Climate Insights for Castle Hills

The climate in Castle Hills is warm and mild. The average annual temperature is 21°C and approximately 814mm of precipitation falls per year. Castle Hills receives a notable amount of rainfall throughout the year, including during its driest month. Castle Hills is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: Agosto, Luglio, Giugno. The coldest months are Gennaio, Febbraio, Dicembre, when temperatures can drop to 6°C.

Temperatures in Castle Hills vary considerably across the year, with a 30°C difference between the coldest and warmest months. Agosto is the hottest month, with daytime highs reaching 36°C and an average of 30°C. Gennaio is the coolest month, with minimum temperatures around 6°C and an average of 11°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 6°C shift in average temperatures.

Castle Hills is a moderately rainy area, receiving approximately 814mm of precipitation annually, which averages out to around 68mm per month. The wettest month is May, averaging 125mm of rainfall. April and October also tend to see above-average precipitation. The driest month is February, with just 42mm. That's 82mm less than May, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

Castle Hills is mildly breezy, with an average annual wind speed of 18km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 20km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 15km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 5km/h between the calmest and windiest months.

It is currently spring in Castle Hills, which began on March 20, 2026. Castle Hills is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in Agosto at around 36°C, while the coldest stretch bottoms out in Gennaio near 6°C. Summer is next, beginning on June 21, 2026 — 92 days from now.

The best time to visit Castle Hills is during Marzo, Aprile, Ottobre and Novembre, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 73mm per month. By contrast, Agosto can be uncomfortably hot with highs reaching 36°C, while Gennaio is the coldest period with lows dropping to 6°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Castle Hills based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.