Big Pine Key, Florida has a Tropical Savanna (Wet and Dry Climate) climate (Köppen classification: Aw). Average annual temperatures range from 73.1 °F (low) to 82.6 °F (high). Annual precipitation averages 44.8 Inches. Big Pine Key is located in USDA Plant Hardiness Zone 11b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 64.1 °F | 74.1 °F | 1.8 in. |
| February | 65.8 °F | 76.2 °F | 2.04 in. |
| March | 68.3 °F | 78.3 °F | 1.56 in. |
| April | 72.2 °F | 82.1 °F | 2.17 in. |
| May | 75.7 °F | 85.2 °F | 3.66 in. |
| June | 78.5 °F | 88.2 °F | 5.45 in. |
| July | 79.7 °F | 89.5 °F | 4.84 in. |
| August | 79.8 °F | 89.7 °F | 6.33 in. |
| September | 78.5 °F | 88.1 °F | 7.2 in. |
| October | 76.1 °F | 84.1 °F | 6.03 in. |
| November | 71.2 °F | 79.3 °F | 1.96 in. |
| December | 67.4 °F | 76.5 °F | 1.77 in. |
| Annual | 73.1 °F | 82.6 °F | 44.81 in. |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 11b : 45°F to 40°F |
| Plant Hardiness Zone - 2012 | Zone 11b : 45°F to 40°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Aw - Tropical Savanna (Wet and Dry Climate) |