Garland, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.9 °F (low) to 70.5 °F (high). Annual precipitation averages 54.7 Inches. Garland 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 | 30.3 °F | 47.2 °F | 4.13 in. |
| February | 33.3 °F | 52.0 °F | 4.5 in. |
| March | 41.0 °F | 61.0 °F | 5.27 in. |
| April | 50.3 °F | 71.2 °F | 5.33 in. |
| May | 60.4 °F | 79.7 °F | 5.65 in. |
| June | 68.3 °F | 87.3 °F | 4.39 in. |
| July | 71.3 °F | 90.0 °F | 4.29 in. |
| August | 69.3 °F | 89.2 °F | 3.34 in. |
| September | 62.0 °F | 83.7 °F | 3.64 in. |
| October | 50.6 °F | 73.4 °F | 3.77 in. |
| November | 40.5 °F | 60.5 °F | 4.71 in. |
| December | 33.3 °F | 50.4 °F | 5.69 in. |
| Annual | 50.9 °F | 70.5 °F | 54.71 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |