Grand Prairie, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.6 °C (low) to 24.8 °C (high). Annual precipitation averages 989.6 Millimeters. 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 | 2.2 °C | 13.4 °C | 66.29 mm |
| February | 4.3 °C | 15.9 °C | 70.87 mm |
| March | 8.4 °C | 19.8 °C | 85.34 mm |
| April | 12.9 °C | 24.3 °C | 90.17 mm |
| May | 18.2 °C | 28.5 °C | 117.86 mm |
| June | 22.7 °C | 32.9 °C | 101.6 mm |
| July | 24.4 °C | 35.4 °C | 51.56 mm |
| August | 24.4 °C | 35.7 °C | 57.4 mm |
| September | 20.4 °C | 31.8 °C | 77.98 mm |
| October | 14 °C | 26.1 °C | 118.11 mm |
| November | 8 °C | 19.4 °C | 72.64 mm |
| December | 3.4 °C | 14.6 °C | 79.76 mm |
| Annual | 13.6 °C | 24.8 °C | 989.58 mm |
| 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 : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |