Hardin, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 58.5 °F (low) to 78.8 °F (high). Annual precipitation averages 61.6 Inches. Hardin is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 41.3 °F | 62.2 °F | 4.9 in. |
| February | 44.9 °F | 66.0 °F | 3.9 in. |
| March | 51.5 °F | 72.2 °F | 4.06 in. |
| April | 58.1 °F | 78.3 °F | 4.44 in. |
| May | 66.1 °F | 84.8 °F | 5.6 in. |
| June | 72.2 °F | 90.5 °F | 5.63 in. |
| July | 74.1 °F | 92.7 °F | 4.76 in. |
| August | 73.7 °F | 93.5 °F | 5.97 in. |
| September | 68.8 °F | 89.1 °F | 5.88 in. |
| October | 59.1 °F | 81.6 °F | 6.42 in. |
| November | 49.4 °F | 71.3 °F | 4.83 in. |
| December | 43.1 °F | 63.8 °F | 5.2 in. |
| Annual | 58.5 °F | 78.8 °F | 61.59 in. |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |