Mount Olive, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.8 °C (low) to 24.7 °C (high). Annual precipitation averages 1494 Millimeters. Mount Olive is located in USDA Plant Hardiness Zone 8b. 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 | 2.1 °C | 14.7 °C | 144.02 mm |
| February | 3.8 °C | 17.1 °C | 133.35 mm |
| March | 7.3 °C | 21.1 °C | 145.29 mm |
| April | 11.2 °C | 24.8 °C | 135.38 mm |
| May | 15.9 °C | 28.7 °C | 98.3 mm |
| June | 19.9 °C | 31.8 °C | 123.95 mm |
| July | 21.3 °C | 33 °C | 137.92 mm |
| August | 20.9 °C | 32.9 °C | 134.87 mm |
| September | 18.2 °C | 30.7 °C | 96.52 mm |
| October | 11.6 °C | 25.8 °C | 86.61 mm |
| November | 5.9 °C | 19.9 °C | 114.05 mm |
| December | 3.3 °C | 15.8 °C | 143.76 mm |
| Annual | 11.8 °C | 24.7 °C | 1494.02 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |