| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 7b: 5°F to 10°F |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F |
| 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: | 45a - Southern Inner Piedmont |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 30022 - Alpharetta, GA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 29 | 31 | 38 | 45 | 54 | 62 | 67 | 66 | 60 | 47 | 39 | 31 | 47 |
| Avg Max Temp (°F) | 50 | 55 | 63 | 71 | 78 | 85 | 88 | 86 | 81 | 72 | 62 | 53 | 70 |
| Avg Precip (In.) | 5.79 | 4.86 | 5.82 | 4.25 | 4.37 | 3.91 | 4.47 | 4.24 | 4.17 | 3.67 | 4.01 | 4.35 | 53.92 |