Holly Hill, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 62.9 °F (low) to 80 °F (high). Annual precipitation averages 50 Inches. Holly Hill is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 48.3 °F | 68.1 °F | 3.13 in. |
| February | 51.1 °F | 70.3 °F | 2.51 in. |
| March | 55.2 °F | 74.3 °F | 3.07 in. |
| April | 60.9 °F | 79.4 °F | 2.54 in. |
| May | 67.0 °F | 84.2 °F | 3.42 in. |
| June | 72.4 °F | 87.8 °F | 6.11 in. |
| July | 74.1 °F | 90.0 °F | 5.5 in. |
| August | 74.6 °F | 89.6 °F | 5.87 in. |
| September | 73.3 °F | 87.1 °F | 7.1 in. |
| October | 66.9 °F | 82.5 °F | 5.28 in. |
| November | 58.4 °F | 75.8 °F | 2.94 in. |
| December | 52.2 °F | 70.3 °F | 2.48 in. |
| Annual | 62.9 °F | 80 °F | 49.95 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : 30°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |