River Falls, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 53.4 °F (low) to 78.1 °F (high). Annual precipitation averages 61.5 Inches. River Falls 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. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.8 °F | 60.7 °F | 5.66 in. |
| February | 39.2 °F | 65.2 °F | 4.78 in. |
| March | 45.2 °F | 71.9 °F | 5.61 in. |
| April | 51.7 °F | 78.5 °F | 4.79 in. |
| May | 60.2 °F | 85.4 °F | 4.48 in. |
| June | 67.9 °F | 90.5 °F | 5.78 in. |
| July | 70.4 °F | 92.2 °F | 6.63 in. |
| August | 69.9 °F | 91.4 °F | 5.47 in. |
| September | 65.1 °F | 88.3 °F | 4.82 in. |
| October | 53.9 °F | 80.0 °F | 3.6 in. |
| November | 43.2 °F | 70.2 °F | 4.35 in. |
| December | 38.8 °F | 63.1 °F | 5.56 in. |
| Annual | 53.4 °F | 78.1 °F | 61.53 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |