Elgin, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7 °C (low) to 19.5 °C (high). Annual precipitation averages 1483.6 Millimeters. Elgin is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.6 °C | 7.3 °C | 125.98 mm |
| February | -2.2 °C | 9.6 °C | 128.52 mm |
| March | 1.4 °C | 14.4 °C | 137.92 mm |
| April | 6.2 °C | 20.3 °C | 132.84 mm |
| May | 11.4 °C | 24.4 °C | 129.03 mm |
| June | 15.6 °C | 27.9 °C | 127.76 mm |
| July | 17.9 °C | 29.6 °C | 146.56 mm |
| August | 17.2 °C | 29.3 °C | 112.78 mm |
| September | 13.5 °C | 26.6 °C | 104.9 mm |
| October | 6.8 °C | 21 °C | 83.06 mm |
| November | 1.2 °C | 14.3 °C | 104.9 mm |
| December | -1.6 °C | 9.2 °C | 149.35 mm |
| Annual | 7 °C | 19.5 °C | 1483.6 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |