Landmark, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.9 °F (low) to 72.7 °F (high). Annual precipitation averages 53.8 Inches. Landmark is located in USDA Plant Hardiness Zone 8a. 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 | 31.2 °F | 50.7 °F | 3.99 in. |
| February | 34.4 °F | 55.3 °F | 4.26 in. |
| March | 41.9 °F | 63.8 °F | 5.13 in. |
| April | 51.0 °F | 73.2 °F | 5.65 in. |
| May | 60.8 °F | 80.8 °F | 5.44 in. |
| June | 68.9 °F | 88.5 °F | 3.7 in. |
| July | 72.2 °F | 91.9 °F | 3.81 in. |
| August | 71.0 °F | 91.7 °F | 3.35 in. |
| September | 63.7 °F | 85.6 °F | 3.53 in. |
| October | 51.7 °F | 74.9 °F | 4.61 in. |
| November | 41.3 °F | 62.4 °F | 4.95 in. |
| December | 34.3 °F | 53.4 °F | 5.39 in. |
| Annual | 51.9 °F | 72.7 °F | 53.81 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |