Martin, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.9 °C (low) to 20.6 °C (high). Annual precipitation averages 1370.6 Millimeters. Martin is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.6 °C | 7.5 °C | 106.43 mm |
| February | -1.1 °C | 10.1 °C | 112.78 mm |
| March | 3.4 °C | 15.3 °C | 125.22 mm |
| April | 8.6 °C | 21.1 °C | 133.6 mm |
| May | 14.2 °C | 25.8 °C | 144.78 mm |
| June | 18.6 °C | 29.9 °C | 112.01 mm |
| July | 20.5 °C | 31.7 °C | 110.24 mm |
| August | 19.3 °C | 31.4 °C | 85.6 mm |
| September | 14.9 °C | 28.2 °C | 95.76 mm |
| October | 8.4 °C | 22.2 °C | 98.55 mm |
| November | 2.9 °C | 15.1 °C | 114.55 mm |
| December | -0.9 °C | 9.3 °C | 131.06 mm |
| Annual | 8.9 °C | 20.6 °C | 1370.58 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |