Rosa, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.1 °C (low) to 22.3 °C (high). Annual precipitation averages 1479 Millimeters. Rosa is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.3 °C | 11 °C | 139.7 mm |
| February | 1.2 °C | 13.4 °C | 137.16 mm |
| March | 4.9 °C | 18.1 °C | 138.43 mm |
| April | 9.1 °C | 22.8 °C | 134.62 mm |
| May | 14.2 °C | 26.7 °C | 124.46 mm |
| June | 18.7 °C | 30.3 °C | 128.02 mm |
| July | 20.7 °C | 31.8 °C | 120.9 mm |
| August | 20.2 °C | 31.7 °C | 100.58 mm |
| September | 16.9 °C | 29.1 °C | 105.16 mm |
| October | 10.2 °C | 23.6 °C | 93.98 mm |
| November | 4.2 °C | 17.2 °C | 113.79 mm |
| December | 1.2 °C | 12.4 °C | 142.24 mm |
| Annual | 10.1 °C | 22.3 °C | 1479.04 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |