Delta, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.5 °F (low) to 76 °F (high). Annual precipitation averages 58.4 Inches. Delta is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 36.4 °F | 56.3 °F | 5.61 in. |
| February | 39.6 °F | 60.9 °F | 5.37 in. |
| March | 46.6 °F | 68.9 °F | 5.7 in. |
| April | 54.1 °F | 76.3 °F | 6.58 in. |
| May | 63.1 °F | 83.6 °F | 4.64 in. |
| June | 70.0 °F | 89.4 °F | 4.43 in. |
| July | 72.3 °F | 91.6 °F | 4.2 in. |
| August | 71.2 °F | 91.8 °F | 3.84 in. |
| September | 65.2 °F | 87.7 °F | 3.72 in. |
| October | 53.7 °F | 78.5 °F | 3.91 in. |
| November | 43.5 °F | 67.3 °F | 4.92 in. |
| December | 38.4 °F | 59.1 °F | 5.48 in. |
| Annual | 54.5 °F | 76 °F | 58.4 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |