| 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: | 67f - Southern Limestone/Dolomite Valleys and Low Rolling Hills |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 37615 - Johnson City, TN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 25 | 27 | 34 | 42 | 51 | 59 | 63 | 62 | 55 | 42 | 34 | 27 | 43 |
| Avg Max Temp (°F) | 45 | 50 | 59 | 68 | 75 | 82 | 85 | 84 | 79 | 69 | 58 | 49 | 67 |
| Avg Precip (In.) | 3.72 | 3.54 | 4.04 | 3.36 | 4.42 | 3.97 | 4.43 | 3.28 | 3.16 | 2.44 | 3.16 | 3.49 | 43 |