Green Cove Springs, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 16 °C (low) to 26.2 °C (high). Annual precipitation averages 1356.9 Millimeters. 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 | 7.3 °C | 18.7 °C | 79.5 mm |
| February | 8.8 °C | 20.3 °C | 67.06 mm |
| March | 11.6 °C | 23.3 °C | 88.65 mm |
| April | 15.1 °C | 26.6 °C | 68.07 mm |
| May | 18.9 °C | 29.8 °C | 101.6 mm |
| June | 22.2 °C | 31.3 °C | 197.1 mm |
| July | 23.3 °C | 32.3 °C | 183.9 mm |
| August | 23.4 °C | 31.8 °C | 180.85 mm |
| September | 22.2 °C | 30.3 °C | 171.96 mm |
| October | 17.7 °C | 27.2 °C | 97.28 mm |
| November | 12.4 °C | 22.8 °C | 54.1 mm |
| December | 9.2 °C | 20 °C | 66.8 mm |
| Annual | 16 °C | 26.2 °C | 1356.87 mm |
| 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 : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |