Berwick, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 59.9 °F (low) to 77.2 °F (high). Annual precipitation averages 59.5 Inches. Berwick is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 43.5 °F | 62.0 °F | 5.05 in. |
| February | 47.1 °F | 65.5 °F | 3.53 in. |
| March | 52.8 °F | 71.2 °F | 3.89 in. |
| April | 59.1 °F | 76.8 °F | 4.02 in. |
| May | 66.9 °F | 83.0 °F | 4.52 in. |
| June | 72.7 °F | 87.6 °F | 6.83 in. |
| July | 74.5 °F | 89.2 °F | 6.78 in. |
| August | 74.2 °F | 89.7 °F | 7.34 in. |
| September | 70.6 °F | 86.8 °F | 5.71 in. |
| October | 60.7 °F | 79.9 °F | 3.68 in. |
| November | 50.6 °F | 70.8 °F | 4.0 in. |
| December | 45.5 °F | 64.4 °F | 4.13 in. |
| Annual | 59.9 °F | 77.2 °F | 59.48 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |