McIntosh, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.8 °C (low) to 25.1 °C (high). Annual precipitation averages 1598.9 Millimeters. McIntosh 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 | 1.6 °C | 15.4 °C | 152.91 mm |
| February | 3.6 °C | 17.6 °C | 132.59 mm |
| March | 6.7 °C | 21.6 °C | 142.24 mm |
| April | 10.3 °C | 25.2 °C | 121.16 mm |
| May | 16.1 °C | 29.1 °C | 118.87 mm |
| June | 19.3 °C | 32.1 °C | 159.51 mm |
| July | 21.9 °C | 32.7 °C | 161.04 mm |
| August | 21.6 °C | 32.6 °C | 141.73 mm |
| September | 19.3 °C | 30.4 °C | 119.63 mm |
| October | 11.8 °C | 26.6 °C | 89.41 mm |
| November | 6.3 °C | 20.9 °C | 114.3 mm |
| December | 2.8 °C | 16.7 °C | 145.54 mm |
| Annual | 11.8 °C | 25.1 °C | 1598.93 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 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |