Fairchilds, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 59.8 °F (low) to 79.8 °F (high). Annual precipitation averages 51.6 Inches. Fairchilds is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 43.3 °F | 63.3 °F | 3.84 in. |
| February | 47.2 °F | 67.0 °F | 2.84 in. |
| March | 53.3 °F | 73.3 °F | 3.48 in. |
| April | 59.1 °F | 79.2 °F | 3.97 in. |
| May | 67.1 °F | 85.6 °F | 4.88 in. |
| June | 72.7 °F | 91.2 °F | 5.2 in. |
| July | 73.9 °F | 92.7 °F | 3.98 in. |
| August | 73.9 °F | 94.0 °F | 5.19 in. |
| September | 69.9 °F | 90.1 °F | 5.24 in. |
| October | 60.5 °F | 82.9 °F | 4.63 in. |
| November | 51.5 °F | 72.8 °F | 4.39 in. |
| December | 45.1 °F | 65.5 °F | 3.99 in. |
| Annual | 59.8 °F | 79.8 °F | 51.63 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 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |