Edgard, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 15.4 °C (low) to 25.9 °C (high). Annual precipitation averages 1682.2 Millimeters. Edgard is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.3 °C | 17.1 °C | 149.61 mm |
| February | 8.2 °C | 19.2 °C | 109.47 mm |
| March | 11.7 °C | 22.7 °C | 116.59 mm |
| April | 14.8 °C | 25.8 °C | 127.25 mm |
| May | 19.3 °C | 29.3 °C | 147.83 mm |
| June | 22.6 °C | 32 °C | 203.71 mm |
| July | 23.7 °C | 32.9 °C | 194.56 mm |
| August | 23.4 °C | 33.1 °C | 164.34 mm |
| September | 21.5 °C | 31.2 °C | 134.62 mm |
| October | 15.9 °C | 27.1 °C | 105.41 mm |
| November | 10.4 °C | 22 °C | 104.14 mm |
| December | 7.5 °C | 18.4 °C | 124.71 mm |
| Annual | 15.4 °C | 25.9 °C | 1682.24 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |