Northlake, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.4 °F (low) to 76.3 °F (high). Annual precipitation averages 38.3 Inches. Northlake is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 33.6 °F | 56.0 °F | 2.26 in. |
| February | 37.1 °F | 59.7 °F | 2.6 in. |
| March | 45.2 °F | 67.6 °F | 3.53 in. |
| April | 52.8 °F | 75.3 °F | 3.67 in. |
| May | 62.6 °F | 82.8 °F | 4.65 in. |
| June | 71.0 °F | 91.2 °F | 3.96 in. |
| July | 74.5 °F | 95.6 °F | 2.11 in. |
| August | 74.0 °F | 96.0 °F | 2.39 in. |
| September | 66.5 °F | 88.8 °F | 3.11 in. |
| October | 54.9 °F | 78.3 °F | 4.29 in. |
| November | 44.3 °F | 66.5 °F | 2.88 in. |
| December | 35.7 °F | 57.5 °F | 2.87 in. |
| Annual | 54.4 °F | 76.3 °F | 38.32 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| 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 |