| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F |
| Average First Frost Date: | Nov. 11 - Nov. 20 |
| Average Last Frost Date: | Mar. 21 - Mar. 31 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 65d - Southern Hilly Gulf Coastal Plain |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 39119 - Mount Olive, MS | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 35 | 38 | 45 | 51 | 60 | 67 | 70 | 69 | 64 | 52 | 44 | 38 | 53 |
| Avg Max Temp (°F) | 58 | 63 | 70 | 76 | 82 | 89 | 91 | 91 | 86 | 78 | 68 | 61 | 76 |
| Avg Precip (In.) | 6.15 | 5.14 | 6.48 | 5.93 | 5.28 | 4.21 | 4.79 | 4.05 | 3.8 | 3.45 | 4.95 | 5.53 | 59.76 |