Milton, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 58.5 °F (low) to 78.1 °F (high). Annual precipitation averages 63.4 Inches. 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 | 42.0 °F | 61.9 °F | 6.05 in. |
| February | 45.3 °F | 65.4 °F | 4.35 in. |
| March | 51.7 °F | 72.0 °F | 3.85 in. |
| April | 58.0 °F | 77.9 °F | 5.06 in. |
| May | 66.1 °F | 84.6 °F | 5.14 in. |
| June | 72.1 °F | 89.4 °F | 6.7 in. |
| July | 74.1 °F | 90.9 °F | 6.22 in. |
| August | 73.3 °F | 91.4 °F | 6.23 in. |
| September | 68.8 °F | 88.1 °F | 5.44 in. |
| October | 58.6 °F | 80.8 °F | 4.8 in. |
| November | 48.8 °F | 71.1 °F | 4.82 in. |
| December | 43.7 °F | 63.9 °F | 4.7 in. |
| Annual | 58.5 °F | 78.1 °F | 63.36 in. |
| 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 : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |