| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F |
| 2012 Hardiness Zone: | Zone 8a: 10°F to 15°F |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F |
| Average First Frost Date: | Nov. 21 - Nov. 30 |
| 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: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 36054 - Millbrook, AL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 35 | 37 | 44 | 50 | 59 | 66 | 70 | 69 | 64 | 52 | 43 | 37 | 52 |
| Avg Max Temp (°F) | 57 | 61 | 69 | 76 | 83 | 89 | 92 | 91 | 87 | 78 | 68 | 59 | 76 |
| Avg Precip (In.) | 5.52 | 5.13 | 6.35 | 4.58 | 3.81 | 3.95 | 5.07 | 3.63 | 4.06 | 2.74 | 4.46 | 4.85 | 54.16 |