Robertsdale, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.8 °F (low) to 77 °F (high). Annual precipitation averages 69.9 Inches. Robertsdale 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. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 39.6 °F | 61.0 °F | 5.34 in. |
| February | 43.1 °F | 64.9 °F | 4.62 in. |
| March | 48.9 °F | 70.5 °F | 5.48 in. |
| April | 55.5 °F | 76.7 °F | 5.74 in. |
| May | 63.4 °F | 83.5 °F | 4.63 in. |
| June | 71.2 °F | 88.2 °F | 7.11 in. |
| July | 73.0 °F | 89.7 °F | 8.54 in. |
| August | 72.5 °F | 89.6 °F | 7.39 in. |
| September | 67.8 °F | 86.8 °F | 6.39 in. |
| October | 57.3 °F | 79.5 °F | 4.62 in. |
| November | 47.2 °F | 70.2 °F | 4.65 in. |
| December | 42.3 °F | 63.4 °F | 5.35 in. |
| Annual | 56.8 °F | 77 °F | 69.86 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |