Seadrift, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 17.7 °C (low) to 25.3 °C (high). Annual precipitation averages 1026.2 Millimeters. Seadrift is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.1 °C | 17.2 °C | 71.63 mm |
| February | 10.3 °C | 19.2 °C | 51.05 mm |
| March | 13.9 °C | 21.7 °C | 74.93 mm |
| April | 17.4 °C | 24.6 °C | 58.67 mm |
| May | 21.7 °C | 27.9 °C | 98.81 mm |
| June | 24.7 °C | 30.7 °C | 105.41 mm |
| July | 25.7 °C | 31.5 °C | 89.92 mm |
| August | 25.4 °C | 32.2 °C | 89.41 mm |
| September | 23.2 °C | 31.1 °C | 145.54 mm |
| October | 19.1 °C | 27.2 °C | 100.84 mm |
| November | 13.6 °C | 22.3 °C | 75.44 mm |
| December | 9.4 °C | 18.3 °C | 64.52 mm |
| Annual | 17.7 °C | 25.3 °C | 1026.17 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |