Fannett, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 59.4 °F (low) to 78.1 °F (high). Annual precipitation averages 62.2 Inches. Fannett is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 42.3 °F | 61.4 °F | 5.15 in. |
| February | 46.1 °F | 65.3 °F | 3.67 in. |
| March | 52.3 °F | 71.4 °F | 3.84 in. |
| April | 59.0 °F | 77.7 °F | 3.95 in. |
| May | 67.0 °F | 84.4 °F | 5.1 in. |
| June | 73.1 °F | 89.8 °F | 6.83 in. |
| July | 74.7 °F | 91.6 °F | 5.71 in. |
| August | 74.3 °F | 92.1 °F | 6.35 in. |
| September | 69.6 °F | 88.2 °F | 6.52 in. |
| October | 60.4 °F | 80.7 °F | 5.49 in. |
| November | 50.2 °F | 70.8 °F | 4.64 in. |
| December | 44.2 °F | 63.6 °F | 4.99 in. |
| Annual | 59.4 °F | 78.1 °F | 62.24 in. |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| 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 |