South Pittsburg, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9 °C (low) to 21.7 °C (high). Annual precipitation averages 1517.4 Millimeters. South Pittsburg 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 | -1.4 °C | 9.9 °C | 142.49 mm |
| February | 0.4 °C | 12.6 °C | 144.02 mm |
| March | 3.8 °C | 17.3 °C | 141.99 mm |
| April | 7.9 °C | 22.3 °C | 136.14 mm |
| May | 13.2 °C | 26.2 °C | 115.82 mm |
| June | 17.8 °C | 29.9 °C | 117.86 mm |
| July | 19.8 °C | 31.6 °C | 131.06 mm |
| August | 19.2 °C | 31.3 °C | 95.76 mm |
| September | 15.6 °C | 28.5 °C | 111.76 mm |
| October | 8.7 °C | 22.8 °C | 90.93 mm |
| November | 2.7 °C | 16.5 °C | 126.49 mm |
| December | 0.1 °C | 11.8 °C | 163.07 mm |
| Annual | 9 °C | 21.7 °C | 1517.39 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |