Santo André Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Santo André, Alentejo, Portugal. This average is based on long-term data collected between 1990 and 2020. Let's explore the details to provide you with a complete overview.

Generally, Santo André has a moderate amount of precipitation, averaging 578 mm (23 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))

Santo André can be quite wet during December, receiving approximately 82 mm (3.2 in) of precipitation over 13 rainy days.

In contrast July, experiences much drier conditions, with 2.6 mm (0.1 in) of rainfall, spread across a single rainy day.

December, the wettest month, has a maximum daytime temperature of 17°C (63°F). During the driest month July you can expect a temperature of 27°C (81°F). For more detailed insights into the city's temperatures, visit our Santo André Temperature page.

Santo André's average annual precipitation is 578 mm (23 in). Let's compare this to some popular worldwide tourist destinations:

The city of Rome, Italy, has an average annual precipitation of 832 mm (33 in), spread fairly evenly throughout the year.

In Shanghai, China, the annual average precipitation is 1347 mm (53 in), with a humid subtropical climate.

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 proximity of a location to a large body of water can significantly affect its rainfall patterns:

• Ocean Influence: Coastal regions typically receive more rainfall due to the presence of moisture-laden winds from the ocean. These regions tend to have more humid climates and experience more frequent precipitation, especially in winter.
• Continental Climates: Areas further from the sea, such as inland or continental regions, experience less frequent rainfall and more extreme seasonal variations in precipitation.

• "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 (15 inches) wide and 20 cm (7.9 inches) 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 (103 feet) fell during the winter of 1972.

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