| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 8a: 10°F to 15°F |
| 1990 Hardiness Zone: | Zone 7b: 5F to 10F |
| Average First Frost Date: | Nov. 1 - Nov. 10 |
| Average Last Frost Date: | Mar. 21 - Mar. 31 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 45b - Southern Outer Piedmont |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 30252 - McDonough, GA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 31 | 33 | 40 | 47 | 56 | 64 | 68 | 67 | 62 | 49 | 41 | 33 | 49 |
| Avg Max Temp (°F) | 53 | 57 | 66 | 74 | 81 | 87 | 90 | 88 | 83 | 74 | 64 | 55 | 73 |
| Avg Precip (In.) | 5.16 | 4.68 | 5.42 | 3.68 | 3.82 | 3.68 | 4.62 | 3.98 | 3.47 | 3.07 | 3.77 | 3.98 | 49.32 |