Monterey, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.4 °F (low) to 65.5 °F (high). Annual precipitation averages 63.4 Inches. Monterey is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.1 °F | 43.5 °F | 5.58 in. |
| February | 30.2 °F | 47.9 °F | 5.56 in. |
| March | 36.3 °F | 56.5 °F | 6.01 in. |
| April | 45.2 °F | 66.4 °F | 5.78 in. |
| May | 54.7 °F | 74.4 °F | 5.35 in. |
| June | 62.1 °F | 81.0 °F | 5.45 in. |
| July | 65.6 °F | 83.9 °F | 5.64 in. |
| August | 64.7 °F | 83.5 °F | 4.37 in. |
| September | 58.4 °F | 78.3 °F | 4.67 in. |
| October | 46.7 °F | 68.3 °F | 3.65 in. |
| November | 36.8 °F | 55.8 °F | 4.64 in. |
| December | 30.2 °F | 46.8 °F | 6.66 in. |
| Annual | 46.4 °F | 65.5 °F | 63.36 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |