Largo, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 18.7 °C (low) to 27.2 °C (high). Annual precipitation averages 1433.3 Millimeters. Largo is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.1 °C | 20.8 °C | 75.95 mm |
| February | 12.7 °C | 22.2 °C | 68.33 mm |
| March | 14.9 °C | 24.2 °C | 80.77 mm |
| April | 18.2 °C | 26.9 °C | 73.15 mm |
| May | 21.3 °C | 29.7 °C | 72.9 mm |
| June | 23.9 °C | 31.4 °C | 196.85 mm |
| July | 24.6 °C | 31.8 °C | 247.4 mm |
| August | 24.7 °C | 31.9 °C | 240.03 mm |
| September | 23.8 °C | 31.3 °C | 184.15 mm |
| October | 20.5 °C | 28.7 °C | 69.09 mm |
| November | 15.8 °C | 24.9 °C | 52.07 mm |
| December | 12.8 °C | 22.2 °C | 72.64 mm |
| Annual | 18.7 °C | 27.2 °C | 1433.33 mm |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10a : -1.1°C to 1.7°C |
| Plant Hardiness Zone - 2012 | Zone 10a : -1.1°C to 1.7°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |