Hilliard, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 57.6 °F (low) to 79.7 °F (high). Annual precipitation averages 51.4 Inches. Hilliard is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Jan. 1 - Jan. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 41.4 °F | 64.8 °F | 3.68 in. |
| February | 44.2 °F | 68.1 °F | 3.28 in. |
| March | 49.4 °F | 73.9 °F | 3.76 in. |
| April | 55.7 °F | 80.2 °F | 3.14 in. |
| May | 63.1 °F | 86.4 °F | 3.02 in. |
| June | 70.0 °F | 90.5 °F | 6.93 in. |
| July | 72.3 °F | 92.4 °F | 6.46 in. |
| August | 72.6 °F | 91.5 °F | 7.14 in. |
| September | 69.3 °F | 88.0 °F | 5.84 in. |
| October | 59.8 °F | 80.8 °F | 3.64 in. |
| November | 49.7 °F | 72.7 °F | 1.84 in. |
| December | 44.1 °F | 66.7 °F | 2.71 in. |
| Annual | 57.6 °F | 79.7 °F | 51.44 in. |
| Average First Frost Date | Jan. 1 - Jan. 10 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |