Jena, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.4 °C (low) to 25 °C (high). Annual precipitation averages 1520.7 Millimeters. Jena is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.6 °C | 14.6 °C | 149.86 mm |
| February | 4.2 °C | 16.8 °C | 138.43 mm |
| March | 8 °C | 21.2 °C | 141.73 mm |
| April | 11.9 °C | 25 °C | 135.89 mm |
| May | 16.7 °C | 28.9 °C | 117.35 mm |
| June | 20.5 °C | 32.3 °C | 123.7 mm |
| July | 21.9 °C | 33.6 °C | 121.41 mm |
| August | 21.5 °C | 33.9 °C | 92.46 mm |
| September | 18.4 °C | 31.4 °C | 107.7 mm |
| October | 12.4 °C | 26.4 °C | 113.28 mm |
| November | 6.7 °C | 20.2 °C | 131.32 mm |
| December | 3.7 °C | 15.7 °C | 147.57 mm |
| Annual | 12.4 °C | 25 °C | 1520.7 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°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 |