Boyce, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.4 °C (low) to 25.1 °C (high). Annual precipitation averages 1541.5 Millimeters. Boyce is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.6 °C | 15 °C | 149.35 mm |
| February | 5.4 °C | 17.3 °C | 132.08 mm |
| March | 9.2 °C | 21.4 °C | 138.68 mm |
| April | 13.1 °C | 25.1 °C | 142.24 mm |
| May | 17.8 °C | 29.1 °C | 116.59 mm |
| June | 21.5 °C | 32.2 °C | 125.48 mm |
| July | 22.8 °C | 33.3 °C | 120.9 mm |
| August | 22.5 °C | 33.8 °C | 100.08 mm |
| September | 19.6 °C | 31.2 °C | 105.92 mm |
| October | 13.3 °C | 26.4 °C | 116.59 mm |
| November | 7.7 °C | 20.4 °C | 143.76 mm |
| December | 4.6 °C | 16.1 °C | 149.86 mm |
| Annual | 13.4 °C | 25.1 °C | 1541.53 mm |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |