San Pedro, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 65 °F (low) to 84.4 °F (high). Annual precipitation averages 28.2 Inches. San Pedro is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 50.5 °F | 70.6 °F | 1.1 in. |
| February | 54.4 °F | 74.8 °F | 1.3 in. |
| March | 59.6 °F | 79.6 °F | 1.36 in. |
| April | 65.6 °F | 84.8 °F | 1.46 in. |
| May | 71.7 °F | 89.5 °F | 2.34 in. |
| June | 75.5 °F | 93.7 °F | 2.8 in. |
| July | 76.3 °F | 94.8 °F | 2.78 in. |
| August | 76.4 °F | 96.0 °F | 2.04 in. |
| September | 73.3 °F | 91.5 °F | 5.72 in. |
| October | 66.5 °F | 86.7 °F | 3.82 in. |
| November | 58.4 °F | 78.6 °F | 1.81 in. |
| December | 52.0 °F | 71.9 °F | 1.64 in. |
| Annual | 65 °F | 84.4 °F | 28.17 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10a : 30°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 10a : 30°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |