Newbern, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 53.2 °F (low) to 75.6 °F (high). Annual precipitation averages 54.7 Inches. Newbern is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.1 °F | 56.4 °F | 5.37 in. |
| February | 38.4 °F | 60.7 °F | 5.44 in. |
| March | 44.4 °F | 69.0 °F | 5.42 in. |
| April | 51.4 °F | 75.7 °F | 4.84 in. |
| May | 60.5 °F | 83.1 °F | 3.94 in. |
| June | 68.4 °F | 89.2 °F | 4.26 in. |
| July | 71.2 °F | 91.3 °F | 4.98 in. |
| August | 70.6 °F | 91.4 °F | 4.56 in. |
| September | 65.1 °F | 87.2 °F | 3.68 in. |
| October | 53.2 °F | 77.7 °F | 3.24 in. |
| November | 42.3 °F | 66.8 °F | 4.26 in. |
| December | 37.6 °F | 58.5 °F | 4.72 in. |
| Annual | 53.2 °F | 75.6 °F | 54.71 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |