Doyline, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 53.9 °F (low) to 76.2 °F (high). Annual precipitation averages 55.3 Inches. Doyline 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 | 35.2 °F | 56.7 °F | 5.08 in. |
| February | 38.5 °F | 60.8 °F | 4.85 in. |
| March | 45.2 °F | 68.5 °F | 5.36 in. |
| April | 52.6 °F | 76.2 °F | 5.32 in. |
| May | 62.2 °F | 83.3 °F | 4.58 in. |
| June | 69.8 °F | 89.9 °F | 4.77 in. |
| July | 72.8 °F | 93.2 °F | 3.84 in. |
| August | 71.9 °F | 93.7 °F | 3.31 in. |
| September | 65.4 °F | 88.5 °F | 3.81 in. |
| October | 53.4 °F | 78.2 °F | 4.72 in. |
| November | 43.3 °F | 66.8 °F | 4.31 in. |
| December | 37.0 °F | 58.6 °F | 5.36 in. |
| Annual | 53.9 °F | 76.2 °F | 55.31 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 40-50 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |