Grand Prairie, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.5 °F (low) to 76.7 °F (high). Annual precipitation averages 39 Inches. Grand Prairie 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 | 36.0 °F | 56.2 °F | 2.61 in. |
| February | 39.7 °F | 60.7 °F | 2.79 in. |
| March | 47.2 °F | 67.7 °F | 3.36 in. |
| April | 55.3 °F | 75.8 °F | 3.55 in. |
| May | 64.8 °F | 83.3 °F | 4.64 in. |
| June | 72.8 °F | 91.3 °F | 4.0 in. |
| July | 76.0 °F | 95.8 °F | 2.03 in. |
| August | 75.9 °F | 96.2 °F | 2.26 in. |
| September | 68.7 °F | 89.3 °F | 3.07 in. |
| October | 57.2 °F | 79.0 °F | 4.65 in. |
| November | 46.4 °F | 67.0 °F | 2.86 in. |
| December | 38.1 °F | 58.2 °F | 3.14 in. |
| Annual | 56.5 °F | 76.7 °F | 38.96 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |