Blytheville, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.8 °F (low) to 70 °F (high). Annual precipitation averages 53.8 Inches. Blytheville 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 | 29.4 °F | 45.7 °F | 3.77 in. |
| February | 32.8 °F | 50.8 °F | 4.38 in. |
| March | 40.5 °F | 59.9 °F | 5.21 in. |
| April | 50.2 °F | 70.6 °F | 5.54 in. |
| May | 60.8 °F | 79.7 °F | 5.6 in. |
| June | 68.8 °F | 87.7 °F | 4.24 in. |
| July | 71.8 °F | 90.1 °F | 4.25 in. |
| August | 69.5 °F | 89.1 °F | 3.38 in. |
| September | 62.1 °F | 83.6 °F | 3.58 in. |
| October | 50.3 °F | 73.3 °F | 4.09 in. |
| November | 40.2 °F | 59.8 °F | 4.58 in. |
| December | 33.0 °F | 49.3 °F | 5.18 in. |
| Annual | 50.8 °F | 70 °F | 53.8 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 |