Oakhaven, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.4 °F (low) to 74.3 °F (high). Annual precipitation averages 54.4 Inches. Oakhaven 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 | 31.9 °F | 53.9 °F | 4.05 in. |
| February | 35.2 °F | 58.2 °F | 4.5 in. |
| March | 42.3 °F | 66.3 °F | 5.22 in. |
| April | 50.0 °F | 74.4 °F | 5.63 in. |
| May | 59.7 °F | 81.2 °F | 5.86 in. |
| June | 67.7 °F | 88.5 °F | 4.16 in. |
| July | 70.9 °F | 92.5 °F | 3.58 in. |
| August | 69.7 °F | 92.6 °F | 3.12 in. |
| September | 63.0 °F | 86.7 °F | 4.02 in. |
| October | 51.0 °F | 76.3 °F | 4.5 in. |
| November | 40.9 °F | 64.5 °F | 4.47 in. |
| December | 34.5 °F | 56.0 °F | 5.32 in. |
| Annual | 51.4 °F | 74.3 °F | 54.43 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |