Hartman, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.6 °F (low) to 72.4 °F (high). Annual precipitation averages 49.5 Inches. Hartman is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.9 °F | 50.0 °F | 3.59 in. |
| February | 32.2 °F | 54.9 °F | 3.09 in. |
| March | 39.8 °F | 63.5 °F | 4.38 in. |
| April | 48.3 °F | 72.8 °F | 4.74 in. |
| May | 58.2 °F | 80.0 °F | 5.58 in. |
| June | 66.7 °F | 88.0 °F | 3.93 in. |
| July | 70.2 °F | 92.7 °F | 3.84 in. |
| August | 69.1 °F | 92.6 °F | 3.97 in. |
| September | 61.5 °F | 85.6 °F | 3.51 in. |
| October | 49.5 °F | 74.5 °F | 4.17 in. |
| November | 39.2 °F | 62.3 °F | 4.82 in. |
| December | 31.7 °F | 52.1 °F | 3.86 in. |
| Annual | 49.6 °F | 72.4 °F | 49.48 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |