Germantown, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.1 °F (low) to 71.8 °F (high). Annual precipitation averages 56.2 Inches. Germantown 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 | 31.8 °F | 48.9 °F | 4.26 in. |
| February | 34.8 °F | 54.0 °F | 4.74 in. |
| March | 42.4 °F | 62.7 °F | 5.72 in. |
| April | 51.3 °F | 72.6 °F | 5.89 in. |
| May | 60.9 °F | 80.5 °F | 5.36 in. |
| June | 68.8 °F | 87.8 °F | 4.61 in. |
| July | 72.4 °F | 90.8 °F | 4.53 in. |
| August | 71.1 °F | 90.5 °F | 3.31 in. |
| September | 63.8 °F | 85.0 °F | 3.54 in. |
| October | 51.9 °F | 74.2 °F | 4.18 in. |
| November | 41.3 °F | 62.1 °F | 4.52 in. |
| December | 34.8 °F | 52.0 °F | 5.57 in. |
| Annual | 52.1 °F | 71.8 °F | 56.23 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 |