Highland Park, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.1 °F (low) to 76.4 °F (high). Annual precipitation averages 40.4 Inches. Highland Park is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.8 °F | 56.1 °F | 2.69 in. |
| February | 39.4 °F | 60.2 °F | 3.01 in. |
| March | 46.9 °F | 67.5 °F | 3.61 in. |
| April | 54.7 °F | 75.6 °F | 3.48 in. |
| May | 64.2 °F | 83.0 °F | 4.78 in. |
| June | 72.2 °F | 91.0 °F | 3.97 in. |
| July | 75.4 °F | 95.3 °F | 2.02 in. |
| August | 75.3 °F | 95.7 °F | 2.32 in. |
| September | 68.2 °F | 88.9 °F | 3.23 in. |
| October | 56.7 °F | 78.6 °F | 4.79 in. |
| November | 46.1 °F | 66.7 °F | 3.07 in. |
| December | 37.8 °F | 58.0 °F | 3.39 in. |
| Annual | 56.1 °F | 76.4 °F | 40.36 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 20-30 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 |