Welcome, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14.8 °C (low) to 25.8 °C (high). Annual precipitation averages 1681.2 Millimeters. Welcome is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.8 °C | 17.1 °C | 146.05 mm |
| February | 7.7 °C | 19.1 °C | 112.78 mm |
| March | 11 °C | 22.6 °C | 108.46 mm |
| April | 14.2 °C | 25.7 °C | 132.84 mm |
| May | 18.7 °C | 29.3 °C | 161.29 mm |
| June | 22.1 °C | 31.8 °C | 194.06 mm |
| July | 23.2 °C | 32.8 °C | 165.35 mm |
| August | 22.9 °C | 32.9 °C | 184.66 mm |
| September | 20.9 °C | 31.2 °C | 134.87 mm |
| October | 15.2 °C | 27.1 °C | 111 mm |
| November | 9.6 °C | 21.8 °C | 108.2 mm |
| December | 6.8 °C | 18.3 °C | 121.67 mm |
| Annual | 14.8 °C | 25.8 °C | 1681.23 mm |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°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 |