Hearne, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.3 °F (low) to 79 °F (high). Annual precipitation averages 39.1 Inches. Hearne is located in USDA Plant Hardiness Zone 9a. 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 | 38.1 °F | 60.7 °F | 3.54 in. |
| February | 41.8 °F | 64.3 °F | 2.9 in. |
| March | 48.2 °F | 71.4 °F | 3.26 in. |
| April | 55.4 °F | 78.4 °F | 2.96 in. |
| May | 64.4 °F | 85.2 °F | 4.24 in. |
| June | 71.2 °F | 91.7 °F | 3.16 in. |
| July | 73.3 °F | 95.1 °F | 1.82 in. |
| August | 72.8 °F | 96.1 °F | 2.56 in. |
| September | 67.2 °F | 90.5 °F | 3.57 in. |
| October | 56.9 °F | 81.3 °F | 4.45 in. |
| November | 47.0 °F | 70.5 °F | 3.04 in. |
| December | 39.7 °F | 62.3 °F | 3.6 in. |
| Annual | 56.3 °F | 79 °F | 39.1 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 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |