| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F |
| Average First Frost Date: | Nov. 11 - Nov. 20 |
| Average Last Frost Date: | Mar. 11 - Mar. 20 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 74c - Southern Rolling Plains |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 39648 - McComb, MS | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 40 | 47 | 53 | 61 | 67 | 70 | 70 | 65 | 54 | 46 | 40 | 54 |
| Avg Max Temp (°F) | 59 | 63 | 71 | 77 | 84 | 90 | 92 | 92 | 87 | 79 | 69 | 62 | 77 |
| Avg Precip (In.) | 6.59 | 5.46 | 6.52 | 5.84 | 5.49 | 4.81 | 5.38 | 5.04 | 4.55 | 3.47 | 5.07 | 5.8 | 64.03 |