Alamo, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.5 °F (low) to 69.9 °F (high). Annual precipitation averages 53.8 Inches. Alamo 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 Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 29.0 °F | 47.0 °F | 4.01 in. |
| February | 32.2 °F | 51.6 °F | 4.53 in. |
| March | 39.7 °F | 60.7 °F | 5.23 in. |
| April | 49.0 °F | 70.7 °F | 5.06 in. |
| May | 59.1 °F | 78.8 °F | 5.72 in. |
| June | 66.9 °F | 86.4 °F | 3.99 in. |
| July | 70.1 °F | 89.2 °F | 3.9 in. |
| August | 68.0 °F | 88.6 °F | 3.59 in. |
| September | 60.7 °F | 83.0 °F | 3.81 in. |
| October | 48.7 °F | 72.6 °F | 3.93 in. |
| November | 39.0 °F | 60.3 °F | 4.59 in. |
| December | 32.1 °F | 50.1 °F | 5.4 in. |
| Annual | 49.5 °F | 69.9 °F | 53.76 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 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |