| 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. 11 - Mar. 20 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 65p - Southeastern Floodplains and Low Terraces |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 39654 - Monticello, 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 | 51 | 43 | 37 | 52 |
| Avg Max Temp (°F) | 58 | 63 | 71 | 77 | 84 | 90 | 92 | 92 | 87 | 78 | 68 | 61 | 77 |
| Avg Precip (In.) | 6.5 | 5.4 | 6.73 | 6.11 | 5.94 | 4.62 | 4.64 | 4 | 3.82 | 3.52 | 4.95 | 5.76 | 62 |