Doyline, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.2 °C (low) to 24.6 °C (high). Annual precipitation averages 1404.9 Millimeters. 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 | 1.8 °C | 13.7 °C | 129.03 mm |
| February | 3.6 °C | 16 °C | 123.19 mm |
| March | 7.3 °C | 20.3 °C | 136.14 mm |
| April | 11.4 °C | 24.6 °C | 135.13 mm |
| May | 16.8 °C | 28.5 °C | 116.33 mm |
| June | 21 °C | 32.2 °C | 121.16 mm |
| July | 22.7 °C | 34 °C | 97.54 mm |
| August | 22.2 °C | 34.3 °C | 84.07 mm |
| September | 18.6 °C | 31.4 °C | 96.77 mm |
| October | 11.9 °C | 25.7 °C | 119.89 mm |
| November | 6.3 °C | 19.3 °C | 109.47 mm |
| December | 2.8 °C | 14.8 °C | 136.14 mm |
| Annual | 12.2 °C | 24.6 °C | 1404.86 mm |
| 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 : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |