| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F | |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F | |
| Average First Frost Date: | Oct. 21 - Oct. 31 | |
| Average Last Frost Date: | Apr. 11 - Apr. 20 | |
| Koppen-Geiger Climate Zone: | Cfb - Oceanic Climate | |
| Ecoregion: | 66e - Southern Sedimentary Ridges | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 37640 - Butler, TN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 22 | 24 | 32 | 40 | 49 | 57 | 61 | 60 | 54 | 41 | 33 | 26 | 41 |
| Avg Max Temp (°F) | 44 | 48 | 57 | 67 | 74 | 80 | 83 | 83 | 78 | 68 | 57 | 47 | 65 |
| Avg Precip (In.) | 3.8 | 3.81 | 4.35 | 3.84 | 4.81 | 4.37 | 4.74 | 3.78 | 3.43 | 2.56 | 3.12 | 3.59 | 46.21 |