Lynn, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.6 °C (low) to 22.2 °C (high). Annual precipitation averages 1582.4 Millimeters. 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 Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.2 °C | 10.8 °C | 147.32 mm |
| February | 0.7 °C | 13.2 °C | 149.61 mm |
| March | 4.4 °C | 18 °C | 144.53 mm |
| April | 8.8 °C | 22.6 °C | 150.37 mm |
| May | 14 °C | 26.5 °C | 134.62 mm |
| June | 18.3 °C | 30.2 °C | 130.3 mm |
| July | 20.2 °C | 31.8 °C | 129.29 mm |
| August | 19.7 °C | 31.7 °C | 114.05 mm |
| September | 16.2 °C | 29.1 °C | 108.71 mm |
| October | 9.5 °C | 23.4 °C | 99.57 mm |
| November | 3.4 °C | 17.1 °C | 116.59 mm |
| December | 0.7 °C | 12.2 °C | 157.48 mm |
| Annual | 9.6 °C | 22.2 °C | 1582.44 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |