Belmont, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.9 °C (low) to 25.1 °C (high). Annual precipitation averages 1409.2 Millimeters. Belmont is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3 °C | 14.8 °C | 137.92 mm |
| February | 4.8 °C | 17.3 °C | 119.63 mm |
| March | 8.5 °C | 21.3 °C | 133.1 mm |
| April | 12.6 °C | 25.1 °C | 126.75 mm |
| May | 17.2 °C | 28.9 °C | 115.06 mm |
| June | 21.1 °C | 32.3 °C | 116.08 mm |
| July | 22.5 °C | 33.6 °C | 97.79 mm |
| August | 22 °C | 34.1 °C | 97.79 mm |
| September | 18.7 °C | 31.4 °C | 91.44 mm |
| October | 12.7 °C | 26.3 °C | 112.52 mm |
| November | 7.2 °C | 20.4 °C | 119.89 mm |
| December | 4.1 °C | 15.9 °C | 141.22 mm |
| Annual | 12.9 °C | 25.1 °C | 1409.19 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |