Grand Ridge, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.5 °F (low) to 78.8 °F (high). Annual precipitation averages 56.2 Inches. Grand Ridge is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 39.3 °F | 62.2 °F | 4.82 in. |
| February | 42.5 °F | 66.0 °F | 4.66 in. |
| March | 48.0 °F | 72.9 °F | 5.13 in. |
| April | 54.9 °F | 79.2 °F | 4.46 in. |
| May | 63.4 °F | 86.6 °F | 3.44 in. |
| June | 70.4 °F | 90.6 °F | 5.77 in. |
| July | 72.3 °F | 92.1 °F | 6.16 in. |
| August | 72.1 °F | 91.3 °F | 5.79 in. |
| September | 68.1 °F | 87.9 °F | 5.27 in. |
| October | 57.5 °F | 80.7 °F | 3.03 in. |
| November | 47.0 °F | 71.3 °F | 3.49 in. |
| December | 42.1 °F | 64.4 °F | 4.2 in. |
| Annual | 56.5 °F | 78.8 °F | 56.22 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |