Milton, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.9 °C (low) to 21.9 °C (high). Annual precipitation averages 1367.5 Millimeters. Milton 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 Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.7 °C | 10.7 °C | 125.22 mm |
| February | 1.1 °C | 13.1 °C | 122.68 mm |
| March | 4.4 °C | 17.6 °C | 129.79 mm |
| April | 8.9 °C | 22.3 °C | 110.24 mm |
| May | 14.2 °C | 26.4 °C | 101.6 mm |
| June | 18.6 °C | 29.9 °C | 107.7 mm |
| July | 20.6 °C | 31.4 °C | 126.49 mm |
| August | 20.1 °C | 31.2 °C | 108.71 mm |
| September | 16.6 °C | 28.2 °C | 112.52 mm |
| October | 10.1 °C | 22.8 °C | 94.23 mm |
| November | 3.8 °C | 16.7 °C | 108.2 mm |
| December | 1.1 °C | 12.1 °C | 120.14 mm |
| Annual | 9.9 °C | 21.9 °C | 1367.52 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |