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

This page shows the average amount of rainfall per month in Holywood. 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.

Holywood has a relatively rain/snowy climate with high precipitation levels, averaging 1250 mm of rain/snowfall annually.

Monthly Precipitation Levels

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

Precipitation levels in Holywood remain relatively steady throughout the year. December has the most rain, with 124 mm over 19 days. In April, this drops slightly to 84 mm, making the city's climate fairly predictable.

December, the city’s wettest month, has a maximum daytime temperature of 8°C. During the driest month April you can expect a temperature of 12°C. For more detailed insights into the city’s temperatures, visit our Holywood Temperature page.

Annual Precipitation in the United Kingdom

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

Amsterdam Precipitation Compared World Wide

Holywood’s average annual precipitation is 1250 mm. Let’s compare this to some popular worldwide tourist destinations:

Boston, USA, experiences 1238 mm of annual precipitation, including significant snowfall during the winter.

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

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

Bangkok, Thailand, experiences a tropical monsoon climate with 1668 mm of annual rainfall, with the heaviest precipitation occurring during September and October.

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.

Interesting weather facts

• "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
• The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm wide and 20 cm thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
• The greatest snowfall recorded was on Mt. Rainier, Washington State, USA—over 31.5 meters fell during the winter of 1972.

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