Calvert City, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.1 °F (low) to 69.1 °F (high). Annual precipitation averages 51.8 Inches. Calvert City is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.9 °F | 44.5 °F | 4.07 in. |
| February | 29.9 °F | 49.1 °F | 3.91 in. |
| March | 37.8 °F | 59.1 °F | 4.76 in. |
| April | 47.3 °F | 70.6 °F | 5.13 in. |
| May | 57.2 °F | 78.6 °F | 5.54 in. |
| June | 65.9 °F | 86.8 °F | 4.54 in. |
| July | 69.6 °F | 90.2 °F | 4.27 in. |
| August | 67.4 °F | 89.4 °F | 3.26 in. |
| September | 59.6 °F | 83.2 °F | 3.46 in. |
| October | 48.2 °F | 71.8 °F | 3.84 in. |
| November | 37.6 °F | 58.5 °F | 4.25 in. |
| December | 30.2 °F | 47.9 °F | 4.79 in. |
| Annual | 48.1 °F | 69.1 °F | 51.82 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |