Montz, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 61.1 °F (low) to 78.4 °F (high). Annual precipitation averages 65.9 Inches. Montz is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 44.4 °F | 62.7 °F | 5.71 in. |
| February | 47.8 °F | 66.4 °F | 4.38 in. |
| March | 53.9 °F | 72.6 °F | 4.57 in. |
| April | 60.2 °F | 78.2 °F | 5.03 in. |
| May | 67.9 °F | 84.6 °F | 5.78 in. |
| June | 73.7 °F | 89.4 °F | 7.69 in. |
| July | 75.5 °F | 91.0 °F | 7.47 in. |
| August | 75.1 °F | 91.3 °F | 6.75 in. |
| September | 72.1 °F | 87.9 °F | 5.4 in. |
| October | 62.7 °F | 80.3 °F | 4.1 in. |
| November | 52.7 °F | 71.2 °F | 4.09 in. |
| December | 46.8 °F | 64.9 °F | 4.95 in. |
| Annual | 61.1 °F | 78.4 °F | 65.92 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |