Richmond, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.5 °F (low) to 75.8 °F (high). Annual precipitation averages 57.1 Inches. Richmond is located in USDA Plant Hardiness Zone 8b. 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 | 36.1 °F | 56.0 °F | 5.62 in. |
| February | 39.3 °F | 60.4 °F | 5.05 in. |
| March | 46.4 °F | 68.4 °F | 5.38 in. |
| April | 54.2 °F | 76.1 °F | 6.42 in. |
| May | 63.1 °F | 83.5 °F | 4.85 in. |
| June | 70.0 °F | 89.4 °F | 4.12 in. |
| July | 72.5 °F | 91.9 °F | 4.04 in. |
| August | 71.4 °F | 92.1 °F | 3.7 in. |
| September | 65.2 °F | 87.7 °F | 3.44 in. |
| October | 53.8 °F | 78.6 °F | 3.93 in. |
| November | 43.7 °F | 67.0 °F | 4.81 in. |
| December | 38.1 °F | 58.5 °F | 5.78 in. |
| Annual | 54.5 °F | 75.8 °F | 57.14 in. |
| 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 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |