Big Pine Key, Florida has a Tropical Savanna (Wet and Dry Climate) climate (Köppen classification: Aw). Average annual temperatures range from 22.8 °C (low) to 28.1 °C (high). Annual precipitation averages 1138.2 Millimeters. Big Pine Key is located in USDA Plant Hardiness Zone 11b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.8 °C | 23.4 °C | 45.72 mm |
| February | 18.8 °C | 24.6 °C | 51.82 mm |
| March | 20.2 °C | 25.7 °C | 39.62 mm |
| April | 22.3 °C | 27.8 °C | 55.12 mm |
| May | 24.3 °C | 29.6 °C | 92.96 mm |
| June | 25.8 °C | 31.2 °C | 138.43 mm |
| July | 26.5 °C | 31.9 °C | 122.94 mm |
| August | 26.6 °C | 32.1 °C | 160.78 mm |
| September | 25.8 °C | 31.2 °C | 182.88 mm |
| October | 24.5 °C | 28.9 °C | 153.16 mm |
| November | 21.8 °C | 26.3 °C | 49.78 mm |
| December | 19.7 °C | 24.7 °C | 44.96 mm |
| Annual | 22.8 °C | 28.1 °C | 1138.17 mm |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 11b : 7.2°C to 10°C |
| Plant Hardiness Zone - 2012 | Zone 11b : 7.2°C to 10°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Aw - Tropical Savanna (Wet and Dry Climate) |