Freeport, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 62.9 °F (low) to 77.9 °F (high). Annual precipitation averages 47 Inches. Freeport is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 45.9 °F | 63.0 °F | 4.02 in. |
| February | 49.7 °F | 65.9 °F | 2.59 in. |
| March | 55.7 °F | 71.3 °F | 2.92 in. |
| April | 62.0 °F | 76.6 °F | 3.0 in. |
| May | 70.1 °F | 82.9 °F | 3.7 in. |
| June | 75.7 °F | 88.1 °F | 4.46 in. |
| July | 77.4 °F | 89.9 °F | 3.68 in. |
| August | 76.9 °F | 90.8 °F | 5.01 in. |
| September | 72.9 °F | 87.4 °F | 5.97 in. |
| October | 64.9 °F | 81.1 °F | 3.93 in. |
| November | 55.5 °F | 72.6 °F | 4.13 in. |
| December | 48.0 °F | 65.6 °F | 3.57 in. |
| Annual | 62.9 °F | 77.9 °F | 46.98 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |