Macclenny, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 57.4 °F (low) to 79.9 °F (high). Annual precipitation averages 53.3 Inches. Macclenny is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 41.6 °F | 65.8 °F | 3.95 in. |
| February | 44.5 °F | 68.9 °F | 2.96 in. |
| March | 49.2 °F | 74.7 °F | 3.73 in. |
| April | 55.2 °F | 80.0 °F | 2.99 in. |
| May | 62.8 °F | 86.4 °F | 3.23 in. |
| June | 69.5 °F | 89.8 °F | 8.23 in. |
| July | 71.8 °F | 91.6 °F | 6.84 in. |
| August | 72.1 °F | 90.8 °F | 7.27 in. |
| September | 69.0 °F | 87.8 °F | 5.88 in. |
| October | 59.6 °F | 81.0 °F | 3.53 in. |
| November | 49.7 °F | 73.7 °F | 1.93 in. |
| December | 44.1 °F | 68.0 °F | 2.71 in. |
| Annual | 57.4 °F | 79.9 °F | 53.25 in. |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |