Green Cove Springs, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 60.8 °F (low) to 79.2 °F (high). Annual precipitation averages 53.4 Inches. Green Cove Springs is located in USDA Plant Hardiness Zone 9b. 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 | 45.2 °F | 65.6 °F | 3.13 in. |
| February | 47.9 °F | 68.5 °F | 2.64 in. |
| March | 52.8 °F | 73.9 °F | 3.49 in. |
| April | 59.1 °F | 79.9 °F | 2.68 in. |
| May | 66.1 °F | 85.6 °F | 4.0 in. |
| June | 72.0 °F | 88.4 °F | 7.76 in. |
| July | 73.9 °F | 90.2 °F | 7.24 in. |
| August | 74.2 °F | 89.3 °F | 7.12 in. |
| September | 71.9 °F | 86.5 °F | 6.77 in. |
| October | 63.9 °F | 80.9 °F | 3.83 in. |
| November | 54.4 °F | 73.1 °F | 2.13 in. |
| December | 48.6 °F | 68.0 °F | 2.63 in. |
| Annual | 60.8 °F | 79.2 °F | 53.42 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 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |