Okolona, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.9 °F (low) to 73.7 °F (high). Annual precipitation averages 56.2 Inches. Okolona 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 | 31.2 °F | 52.9 °F | 4.16 in. |
| February | 34.4 °F | 57.4 °F | 4.47 in. |
| March | 41.5 °F | 65.8 °F | 5.37 in. |
| April | 49.5 °F | 74.2 °F | 5.49 in. |
| May | 59.4 °F | 80.7 °F | 6.36 in. |
| June | 67.5 °F | 88.5 °F | 4.11 in. |
| July | 70.7 °F | 92.2 °F | 4.4 in. |
| August | 69.6 °F | 92.3 °F | 3.4 in. |
| September | 62.7 °F | 86.1 °F | 3.79 in. |
| October | 50.6 °F | 75.6 °F | 4.75 in. |
| November | 40.3 °F | 63.6 °F | 4.59 in. |
| December | 33.7 °F | 55.0 °F | 5.26 in. |
| Annual | 50.9 °F | 73.7 °F | 56.15 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 8a : 10°F to 15°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |