Parsons, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.8 °F (low) to 70.3 °F (high). Annual precipitation averages 56.3 Inches. Parsons is located in USDA Plant Hardiness Zone 7b. 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 | 27.9 °F | 48.1 °F | 4.68 in. |
| February | 31.1 °F | 53.2 °F | 4.91 in. |
| March | 38.0 °F | 62.2 °F | 5.19 in. |
| April | 46.5 °F | 71.7 °F | 5.6 in. |
| May | 56.5 °F | 78.5 °F | 5.55 in. |
| June | 64.6 °F | 85.4 °F | 4.54 in. |
| July | 68.2 °F | 88.4 °F | 4.63 in. |
| August | 66.5 °F | 88.2 °F | 3.71 in. |
| September | 59.3 °F | 83.0 °F | 4.08 in. |
| October | 46.9 °F | 73.0 °F | 3.87 in. |
| November | 36.7 °F | 61.0 °F | 4.15 in. |
| December | 30.9 °F | 51.0 °F | 5.42 in. |
| Annual | 47.8 °F | 70.3 °F | 56.33 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 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |