| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F | |
| 2012 Hardiness Zone: | 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. 11 - Apr. 20 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 67f - Southern Limestone/Dolomite Valleys and Low Rolling Hills | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 37830 - Oak Ridge, TN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 27 | 30 | 37 | 44 | 54 | 62 | 67 | 65 | 59 | 46 | 37 | 30 | 46 |
| Avg Max Temp (°F) | 46 | 51 | 61 | 70 | 78 | 85 | 88 | 87 | 81 | 71 | 59 | 49 | 69 |
| Avg Precip (In.) | 5.1 | 4.46 | 5.69 | 4.29 | 5.1 | 4.58 | 5 | 3.41 | 3.67 | 3.01 | 4.74 | 5.33 | 54.37 |