Castlereagh Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Castlereagh, Down County, United Kingdom. These averages rely on historical data collected over 30 years, from 1990 to 2020. Now, let's break down all the details for a clearer picture.

Castlereagh has a relatively rainy climate with high precipitation levels, averaging 1057 mm (42 in) of rainfall annually.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm (0.01 in))

Despite minor fluctuations, Castlereagh enjoys fairly consistent precipitation throughout the year. In October, you can expect around 103 mm (4.1 in) of precipitation, while in March, Castlereagh receives about 74 mm (2.9 in).

October, the wettest month, has a maximum daytime temperature of 14°C (57°F). The city receives 85 hours of sunshine in this period. During the driest month March you can expect a temperature of 10°C (50°F). For more detailed insights into the city's temperatures, visit our Castlereagh Temperature page.

Castlereagh's average annual precipitation is 1057 mm (42 in). Let's compare this to some popular worldwide tourist destinations:

The climate in San Francisco, USA, is influenced by coastal weather, with 469 mm (18 in) of rainfall mostly during the winter months.

Beijing, China, receives 560 mm (22 in) of annual precipitation, concentrated in the summer months.

Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.

Mumbai, India, experiences a tropical monsoon climate with 1860 mm (73 in) of annual rainfall, with the majority of precipitation happening during the monsoon season from June to September.

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.

• The U.S. has a significant number of thunderstorms every year, with over 14.6 million taking place across the world annually.
• Approximately 70% of lightning bolts strike land rather than oceans.
• A storm named John was the longest-lasting Pacific tropical storm, continuing for 31 days. As it crossed the dateline twice, it changed status from a hurricane to a typhoon and back to a hurricane.

For more detailed information about Castlereagh's weather, including sunshine hours, humidity levels, and temperature data, visit our Castlereagh Climate page.