Castle Hill Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Castle Hill, New South Wales, Australia. The numbers reflect climate data gathered over a 30-year period, from 1990 to 2020. Let's now guide you through the details for a complete overview.
Generally, Castle Hill has a moderate amount of precipitation, averaging 726 mm (29 in) of rainfall annually. However, it does experience a distinct dry season during certain months. Take a look at our detailed charts below to see the seasonal variation.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
The climate in Castle Hill shows significant variation throughout the year. Expect 100 mm (3.9 in) of precipitation during the wettest month February, distributed over 12 rainy days.
In contrast, July offers drier and sunnier days, with around 37 mm (1.5 in) of rainfall over 8 rainy days.
February, the wettest month, has a maximum daytime temperature of 28°C (82°F). The city receives 207 hours of sunshine in this period. During the driest month July you can expect a temperature of 19°C (66°F). For more detailed insights into the city's temperatures, visit our Castle Hill Temperature page.
Annual Rainfall in Australia: City Comparison
The map below shows the annual precipitation across Australia. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Castle Hill vs World: Rainfall Compared
Castle Hill's average annual precipitation is 726 mm (29 in). Let's compare this to some popular worldwide tourist destinations:
New York City, USA, receives 1276 mm (50 in) of rainfall annually, with precipitation evenly distributed throughout the year.
Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.
In Tokyo, Japan, the average annual precipitation is 1528 mm (60 in), with significant summer rains due to typhoon season.
Bangkok, Thailand, experiences a tropical monsoon climate with 1668 mm (66 in) of annual rainfall, with the heaviest precipitation occurring during September and October.
Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.
Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.
Precipitation has a very strong role in determining the local climate and ecosystem:
- Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
- Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.
- Mawsynram in India is noted as being the wettest place on earth, with over 11 meters (36 feet) of rain falling every year.
- In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm (0.004 inches) per year, with some years recording virtually no rainfall.
- Nearly 1,650 thunderstorm cells are estimated over the planet at any given time.
For more detailed information about Castle Hill's weather, including sunshine hours, humidity levels, and temperature data, visit our Castle Hill Climate page.
