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Tropical savanna climates have monthly mean temperature above 18°C (64°F) in every month of the year and typically a pronounced dry season, with the driest month having precipitation less than 60mm (2.36 in) of precipitation. In essence, a tropical savanna climate tends to either see less rainfall than a tropical monsoon climate or have more pronounced dry seasons than a tropical monsoon climate. Tropical savanna climates are most commonly found in Africa, Asia and South America. The climate is also prevalent in sections of Central America, northern Australia and North America, specifically in sections of Mexico and the state of Florida in the United States.
The Köppen Climate Classification subtype for this climate is "Aw". (Tropical Savanna Climate).
The average temperature for the year in San Antonio is 80.0°F (26.7°C). The warmest month, on average, is September with an average temperature of 83.0°F (28.3°C). The coolest month on average is January, with an average temperature of 76.0°F (24.4°C).
The highest recorded temperature in San Antonio is 99.0°F (37.2°C), which was recorded in March. The lowest recorded temperature in San Antonio is 54.0°F (12.2°C), which was recorded in January.
The average amount of precipitation for the year in San Antonio is 25.9" (657.9 mm). The month with the most precipitation on average is October with 4.4" (111.8 mm) of precipitation. The month with the least precipitation on average is July with an average of 0.7" (17.8 mm). In terms of liquid precipitation, there are an average of 45.7 days of rain, with the most rain occurring in October with 6.8 days of rain, and the least rain occurring in July with 1.5 days of rain.