Dyer, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.6 °F (low) to 69.7 °F (high). Annual precipitation averages 54.2 Inches. Dyer 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 Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.0 °F | 46.2 °F | 4.07 in. |
| February | 30.9 °F | 50.7 °F | 4.6 in. |
| March | 38.8 °F | 60.1 °F | 5.24 in. |
| April | 48.1 °F | 70.6 °F | 5.22 in. |
| May | 58.2 °F | 78.9 °F | 5.66 in. |
| June | 66.0 °F | 86.4 °F | 4.52 in. |
| July | 69.4 °F | 89.4 °F | 4.12 in. |
| August | 67.3 °F | 88.9 °F | 3.31 in. |
| September | 59.7 °F | 83.1 °F | 3.74 in. |
| October | 47.8 °F | 72.4 °F | 3.93 in. |
| November | 38.1 °F | 59.7 °F | 4.55 in. |
| December | 31.2 °F | 49.4 °F | 5.21 in. |
| Annual | 48.6 °F | 69.7 °F | 54.17 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |