Greencastle Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows the average amount of rainfall per month in Greencastle. The numbers are calculated over a 30-year period to provide a reliable average. Let’s explore the details in depth to provide you with a complete overview.

Greencastle experiences significant rainfall throughout the year, averaging 1421 mm of precipitation annually.

Monthly Precipitation Levels

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

While rainfall varies throughout the year, each season offers its own charm. November brings wetter days averaging 148 mm of precipitation, spread over 22 rainy days.

In contrast, May experiences a drier climate, with about 86 mm of rainfall spread across 18 rainy days.

November, the wettest month, has a maximum daytime temperature of 11°C. The city receives 58 hours of sunshine in this period. During the driest month May you can expect a temperature of 13°C. For more detailed insights into the city’s temperatures, visit our Greencastle Temperature page.

Annual Precipitation in Ireland

The map below shows the annual precipitation across Ireland. You can also select the different months in case you are interested in a specific month.

Amsterdam Precipitation Compared World Wide

Greencastle’s average annual precipitation is 1421 mm. Let’s compare this to some popular worldwide tourist destinations:

In Toronto, Canada, annual precipitation averages [964 mm], with snowy winters and rainy summers.

Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm of annual rainfall, mostly in the summer.

Perth, Australia, receives 565 mm of rainfall annually, mostly during the winter months.

Ho Chi Minh City, Vietnam, receives 1955 mm of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.

How is Precipitation Measured?

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.

Global Warming and Precipitation

Climate change is affecting precipitation patterns worldwide, including Greencastle:

• 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.

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