San Antonio, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 61.6 °F (low) to 82.8 °F (high). Annual precipitation averages 57 Inches. San Antonio is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 47.9 °F | 71.3 °F | 3.2 in. |
| February | 50.6 °F | 74.3 °F | 2.42 in. |
| March | 54.0 °F | 78.5 °F | 3.11 in. |
| April | 59.7 °F | 83.1 °F | 3.14 in. |
| May | 65.6 °F | 88.2 °F | 3.44 in. |
| June | 71.3 °F | 90.3 °F | 8.8 in. |
| July | 72.9 °F | 91.0 °F | 8.44 in. |
| August | 73.1 °F | 91.1 °F | 8.98 in. |
| September | 71.5 °F | 89.5 °F | 7.72 in. |
| October | 65.1 °F | 84.6 °F | 3.12 in. |
| November | 56.0 °F | 78.1 °F | 1.91 in. |
| December | 50.9 °F | 73.5 °F | 2.75 in. |
| Annual | 61.6 °F | 82.8 °F | 57.03 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |