Angra do Heroísmo Rainfall & Precipitation: Monthly Averages and Year-Round Insights
This page shows the average amount of rainfall per month in Angra do Heroísmo. The numbers are calculated over a 30-year period to provide a reliable average. Let's now guide you through the details for a complete overview.
Generally, Angra do Heroísmo experiences moderate precipitation patterns, averaging 830 mm yearly.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm)
Significant seasonal changes in precipitation occur throughout the year. During the wet season, December receives substantial rainfall, averaging 122 mm of precipitation, recorded across 19 rainy days.
In contrast, the drier season, July brings less rainfall, with 25 mm over 12 rainy days.December, the wettest month, has a maximum daytime temperature of 18°C. During the driest month July you can expect a temperature of 23°C. For more detailed insights into the city’s temperatures, visit our Angra do Heroísmo Temperature page.
Annual Precipitation in Portugal
The map below shows the annual precipitation across Portugal. You can also select the different months in case you are interested in a specific month.





Amsterdam Precipitation Compared World Wide
Angra do Heroísmo’s average annual precipitation is 830 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.
In Seoul, South Korea, the average annual precipitation is 1237 mm, with most rain falling during the summer monsoon season.
In Brisbane, Australia, the annual precipitation is 979 mm, making it wetter than Sydney.
Mumbai, India, experiences a tropical monsoon climate with 1860 mm of annual rainfall, with the majority of precipitation happening during the monsoon season from June to September.
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.
How Does Precipitation Affect Local Climate?
Precipitation has a very strong role in determining the local climate and ecosystem:
- Rainy Seasons: Many parts of the world have well-defined wet seasons where precipitation is distinctly higher. These are normally accompanied by lush vegetation and temperature patterns.
- Dry Seasons: In areas where the climate is either desert or Mediterranean, the amount of precipitation is drastically reduced, leading to a shortage of water and arid conditions.
For more detailed information about Angra do Heroísmo’s weather, including sunshine hours, humidity levels, and temperature data, visit our Angra do Heroísmo Climate page.