Lynn, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49 °F (low) to 70.4 °F (high). Annual precipitation averages 50.7 Inches. Lynn 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 | 46.8 °F | 3.87 in. |
| February | 31.1 °F | 51.7 °F | 3.98 in. |
| March | 39.0 °F | 60.9 °F | 4.64 in. |
| April | 48.3 °F | 71.0 °F | 5.32 in. |
| May | 58.4 °F | 79.4 °F | 5.23 in. |
| June | 66.8 °F | 87.7 °F | 3.57 in. |
| July | 70.3 °F | 90.8 °F | 3.71 in. |
| August | 68.2 °F | 90.0 °F | 3.73 in. |
| September | 60.3 °F | 83.7 °F | 3.49 in. |
| October | 48.3 °F | 73.3 °F | 3.96 in. |
| November | 38.3 °F | 60.0 °F | 4.69 in. |
| December | 30.9 °F | 49.3 °F | 4.52 in. |
| Annual | 49 °F | 70.4 °F | 50.71 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |