Milner, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.8 °C (low) to 23.2 °C (high). Annual precipitation averages 1286.5 Millimeters. Milner is located in USDA Plant Hardiness Zone 8b. 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 | 0.9 °C | 13 °C | 117.35 mm |
| February | 2.4 °C | 15.1 °C | 117.09 mm |
| March | 5.8 °C | 19.3 °C | 128.02 mm |
| April | 9.8 °C | 23.4 °C | 103.63 mm |
| May | 14.9 °C | 27.5 °C | 81.53 mm |
| June | 19 °C | 30.6 °C | 110.24 mm |
| July | 20.8 °C | 32.2 °C | 127.25 mm |
| August | 20.5 °C | 31.6 °C | 107.44 mm |
| September | 17.3 °C | 28.9 °C | 93.73 mm |
| October | 11.1 °C | 23.9 °C | 80.52 mm |
| November | 5.2 °C | 18.6 °C | 97.54 mm |
| December | 2.3 °C | 14.2 °C | 122.17 mm |
| Annual | 10.8 °C | 23.2 °C | 1286.51 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |