Diaz, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.6 °F (low) to 70.4 °F (high). Annual precipitation averages 51.1 Inches. Diaz 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 | 29.7 °F | 46.7 °F | 3.68 in. |
| February | 32.7 °F | 51.5 °F | 3.93 in. |
| March | 40.8 °F | 60.7 °F | 4.92 in. |
| April | 50.0 °F | 71.0 °F | 5.4 in. |
| May | 60.0 °F | 79.7 °F | 5.46 in. |
| June | 68.5 °F | 87.9 °F | 3.49 in. |
| July | 71.7 °F | 90.6 °F | 3.95 in. |
| August | 69.6 °F | 89.8 °F | 3.17 in. |
| September | 61.7 °F | 83.6 °F | 3.33 in. |
| October | 49.8 °F | 73.4 °F | 4.04 in. |
| November | 40.0 °F | 59.9 °F | 4.83 in. |
| December | 32.6 °F | 49.7 °F | 4.86 in. |
| Annual | 50.6 °F | 70.4 °F | 51.06 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| 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 |