Milton, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14.7 °C (low) to 25.6 °C (high). Annual precipitation averages 1609.4 Millimeters. Milton is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.6 °C | 16.6 °C | 153.67 mm |
| February | 7.4 °C | 18.6 °C | 110.49 mm |
| March | 10.9 °C | 22.2 °C | 97.79 mm |
| April | 14.4 °C | 25.5 °C | 128.52 mm |
| May | 18.9 °C | 29.2 °C | 130.56 mm |
| June | 22.3 °C | 31.9 °C | 170.18 mm |
| July | 23.4 °C | 32.7 °C | 157.99 mm |
| August | 22.9 °C | 33 °C | 158.24 mm |
| September | 20.4 °C | 31.2 °C | 138.18 mm |
| October | 14.8 °C | 27.1 °C | 121.92 mm |
| November | 9.3 °C | 21.7 °C | 122.43 mm |
| December | 6.5 °C | 17.7 °C | 119.38 mm |
| Annual | 14.7 °C | 25.6 °C | 1609.35 mm |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |