North Key Largo, Florida has a Tropical Savanna (Wet and Dry Climate) climate (Köppen classification: Aw). Average annual temperatures range from 21.9 °C (low) to 28.2 °C (high). Annual precipitation averages 1211.3 Millimeters. North Key Largo is located in USDA Plant Hardiness Zone 11a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.6 °C | 24 °C | 45.47 mm |
| February | 17.7 °C | 24.7 °C | 44.96 mm |
| March | 19.1 °C | 25.7 °C | 45.47 mm |
| April | 21.2 °C | 27.7 °C | 65.79 mm |
| May | 23.2 °C | 29.2 °C | 96.52 mm |
| June | 24.8 °C | 30.8 °C | 179.07 mm |
| July | 25.7 °C | 31.6 °C | 118.87 mm |
| August | 25.8 °C | 32 °C | 162.56 mm |
| September | 25.2 °C | 30.9 °C | 181.1 mm |
| October | 23.7 °C | 29.3 °C | 159 mm |
| November | 20.7 °C | 26.8 °C | 60.71 mm |
| December | 18.6 °C | 25.2 °C | 51.82 mm |
| Annual | 21.9 °C | 28.2 °C | 1211.34 mm |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 11a : 4.4°C to 7.2°C |
| Plant Hardiness Zone - 2012 | Zone 10b : 1.7°C to 4.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Aw - Tropical Savanna (Wet and Dry Climate) |