| 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 7a: 0F to 5F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 68a - Cumberland Plateau |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 38585 - Spencer, TN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 26 | 29 | 36 | 44 | 52 | 60 | 65 | 63 | 56 | 44 | 36 | 30 | 45 |
| Avg Max Temp (°F) | 45 | 50 | 59 | 68 | 75 | 82 | 86 | 85 | 79 | 69 | 58 | 49 | 67 |
| Avg Precip (In.) | 5.5 | 4.5 | 6.15 | 4.57 | 5.53 | 4.66 | 4.82 | 4.11 | 4.05 | 3.57 | 5.16 | 5.65 | 58.26 |