Petrolina Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Petrolina, Pernambuco, Brazil. The figures are based on a 30-year period (1990–2020) to provide a reliable average. Let's now guide you through the details for a complete overview.

Petrolina has a relatively dry climate with low precipitation, averaging 440 mm (17 in) of rainfall annually. It experiences a distinct dry season during certain months. Refer to 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))

Petrolina can be quite wet during March, receiving approximately 90 mm (3.5 in) of precipitation over 23 rainy days.

In contrast September, experiences much drier conditions, with 2.9 mm (0.1 in) of rainfall, spread across 13 rainy days.

March, the wettest month, has a maximum daytime temperature of 34°C (93°F). The city receives 224 hours of sunshine in this period. During the driest month September you can expect a temperature of 35°C (95°F). For more detailed insights into the city's temperatures, visit our Petrolina Temperature page.

Annual Rainfall in Brazil: City Comparison

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

Petrolina vs World: Rainfall Compared

Petrolina's average annual precipitation is 440 mm (17 in). Let's compare this to some popular worldwide tourist destinations:

In Barcelona, Spain, the average annual precipitation is 644 mm (25 in), evenly distributed across the year with no extreme wet or dry seasons.

In Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.

In Brisbane, Australia, the annual precipitation is 979 mm (39 in), making it wetter than Sydney.

Bangkok, Thailand, experiences a tropical monsoon climate with 1668 mm (66 in) of annual rainfall, with the heaviest precipitation occurring during September and October.

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.

Climate change is affecting precipitation patterns worldwide, including Petrolina:

• 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.

• "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 Petrolina's weather, including sunshine hours, humidity levels, and temperature data, visit our Petrolina Climate page.