| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 71g - Eastern Highland Rim |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 38581 - Rock Island, TN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 26 | 29 | 36 | 43 | 52 | 61 | 65 | 63 | 57 | 44 | 36 | 29 | 45 |
| Avg Max Temp (°F) | 47 | 52 | 62 | 71 | 78 | 85 | 88 | 87 | 82 | 72 | 61 | 51 | 70 |
| Avg Precip (In.) | 4.92 | 4.25 | 5.93 | 4.28 | 5.39 | 4.58 | 4.72 | 3.73 | 4 | 3.43 | 4.84 | 5.4 | 55.47 |