Coppell, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.2 °F (low) to 76.6 °F (high). Annual precipitation averages 38.8 Inches. Coppell is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.6 °F | 55.9 °F | 2.57 in. |
| February | 39.3 °F | 60.4 °F | 2.77 in. |
| March | 47.0 °F | 67.6 °F | 3.47 in. |
| April | 54.8 °F | 75.9 °F | 3.5 in. |
| May | 64.5 °F | 83.4 °F | 4.76 in. |
| June | 72.6 °F | 91.4 °F | 3.78 in. |
| July | 76.0 °F | 96.0 °F | 2.18 in. |
| August | 75.7 °F | 96.0 °F | 2.2 in. |
| September | 68.4 °F | 89.0 °F | 3.03 in. |
| October | 56.8 °F | 79.0 °F | 4.54 in. |
| November | 46.1 °F | 66.7 °F | 2.92 in. |
| December | 37.5 °F | 58.1 °F | 3.11 in. |
| Annual | 56.2 °F | 76.6 °F | 38.83 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |