Rayville, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.3 °C (low) to 24.5 °C (high). Annual precipitation averages 1476.2 Millimeters. Rayville 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 | 2.1 °C | 13.4 °C | 141.73 mm |
| February | 3.6 °C | 15.8 °C | 124.71 mm |
| March | 7.7 °C | 20.2 °C | 134.62 mm |
| April | 11.8 °C | 24.6 °C | 157.73 mm |
| May | 16.9 °C | 28.8 °C | 129.79 mm |
| June | 20.9 °C | 32.2 °C | 107.95 mm |
| July | 22.5 °C | 33.6 °C | 101.6 mm |
| August | 21.9 °C | 33.9 °C | 101.85 mm |
| September | 18.3 °C | 31.4 °C | 92.46 mm |
| October | 11.9 °C | 26.2 °C | 116.59 mm |
| November | 6.5 °C | 19.4 °C | 120.9 mm |
| December | 3.2 °C | 14.8 °C | 146.3 mm |
| Annual | 12.3 °C | 24.5 °C | 1476.23 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 |