San Antonio Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in San Antonio, Ecuador. These averages rely on historical data collected over 30 years, from 1990 to 2020. Let's now guide you through the details for a complete overview.

San Antonio has a notably wet climate with abundant precipitation, recording 3431 mm (135 in) of rainfall per year.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm (0.01 in))

Significant seasonal changes in precipitation occur throughout the year. During the wettest month, April receives substantial rainfall, averaging 383 mm (15 in) of precipitation, recorded across 18 rainy days.

In contrast, the driest month, August brings less rainfall, with 140 mm (5.5 in) over 5 rainy days.

April, the wettest month, has a maximum daytime temperature of 19°C (66°F). The city receives 131 hours of sunshine in this period. During the driest month August you can expect a temperature of 20°C (68°F). For more detailed insights into the city's temperatures, visit our San Antonio Temperature page.

San Antonio's average annual precipitation is 3431 mm (135 in). Let's compare this to some popular worldwide tourist destinations:

Chicago, USA, sees an annual precipitation of 1062 mm (42 in), with rain and snow contributing to its humid climate.

Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.

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.

Climate change is affecting precipitation patterns worldwide, including San Antonio:

• 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.

• The U.S. has a significant number of thunderstorms every year, with over 14.6 million taking place across the world annually.
• Approximately 70% of lightning bolts strike land rather than oceans.
• A storm named John was the longest-lasting Pacific tropical storm, continuing for 31 days. As it crossed the dateline twice, it changed status from a hurricane to a typhoon and back to a hurricane.

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