Gallaway, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.5 °F (low) to 71.4 °F (high). Annual precipitation averages 55.6 Inches. Gallaway is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 31.0 °F | 48.6 °F | 4.12 in. |
| February | 34.3 °F | 53.4 °F | 4.65 in. |
| March | 41.9 °F | 62.4 °F | 5.51 in. |
| April | 51.0 °F | 72.2 °F | 5.7 in. |
| May | 60.8 °F | 80.4 °F | 5.61 in. |
| June | 68.7 °F | 87.9 °F | 4.46 in. |
| July | 72.0 °F | 90.7 °F | 4.32 in. |
| August | 70.1 °F | 90.1 °F | 3.24 in. |
| September | 62.9 °F | 84.5 °F | 3.76 in. |
| October | 51.2 °F | 74.0 °F | 4.03 in. |
| November | 40.7 °F | 61.5 °F | 4.55 in. |
| December | 33.9 °F | 51.5 °F | 5.65 in. |
| Annual | 51.5 °F | 71.4 °F | 55.6 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |