| 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: | Apr. 1 - Apr. 10 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 45b - Southern Outer Piedmont | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 30662 - Royston, GA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 30 | 32 | 39 | 47 | 56 | 64 | 68 | 67 | 61 | 48 | 40 | 33 | 49 |
| Avg Max Temp (°F) | 52 | 57 | 65 | 73 | 80 | 86 | 90 | 88 | 82 | 73 | 64 | 54 | 72 |
| Avg Precip (In.) | 5.24 | 4.5 | 5.59 | 3.61 | 4.06 | 3.92 | 4.11 | 3.95 | 3.71 | 3.62 | 3.84 | 4.16 | 50.3 |