Olive Branch, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.3 °F (low) to 71.7 °F (high). Annual precipitation averages 57 Inches. Olive Branch 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 | 31.0 °F | 48.9 °F | 4.44 in. |
| February | 34.1 °F | 54.0 °F | 4.95 in. |
| March | 41.8 °F | 62.7 °F | 5.81 in. |
| April | 50.5 °F | 72.6 °F | 5.88 in. |
| May | 60.1 °F | 80.3 °F | 5.26 in. |
| June | 68.1 °F | 87.5 °F | 4.64 in. |
| July | 71.6 °F | 90.5 °F | 4.6 in. |
| August | 70.1 °F | 90.5 °F | 3.41 in. |
| September | 63.0 °F | 85.2 °F | 3.61 in. |
| October | 51.0 °F | 74.2 °F | 4.2 in. |
| November | 40.5 °F | 62.1 °F | 4.58 in. |
| December | 34.1 °F | 51.9 °F | 5.64 in. |
| Annual | 51.3 °F | 71.7 °F | 57.02 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |