San Antonio Rainfall & Precipitation: Monthly Averages and Year-Round Insights

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

San Antonio maintains relatively dry conditions year-round, recording average annual precipitation of 350 mm.

Monthly Precipitation Levels

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

San Antonio can be quite wet during November, receiving approximately 51 mm of precipitation over 11 rainy days.

In contrast July, experiences much drier conditions, with 3.3 mm of rainfall, spread across 3 rainy days.

November, the city’s wettest month, has a maximum daytime temperature of 20°C. During the driest month July you can expect a temperature of 30°C. For more detailed insights into the city’s temperatures, visit our San Antonio Temperature page.

Annual Precipitation in Spain

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

Amsterdam Precipitation Compared World Wide

San Antonio’s average annual precipitation is 350 mm. Let’s compare this to some popular worldwide tourist destinations:

New York City, USA, receives 1276 mm of rainfall annually, with precipitation evenly distributed throughout the year.

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

In Tokyo, Japan, the average annual precipitation is 1528 mm, with significant summer rains due to typhoon season.

Ho Chi Minh City, Vietnam, receives 1955 mm of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.

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

• Mawsynram in India is noted as being the wettest place on earth, with over 11 meters of rain falling every year.
• In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm per year, with some years recording virtually no rainfall.
• Nearly 1,650 thunderstorm cells are estimated over the planet at any given time.

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