Largo, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 65.7 °F (low) to 80.9 °F (high). Annual precipitation averages 56.4 Inches. Largo is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 51.9 °F | 69.5 °F | 2.99 in. |
| February | 54.9 °F | 72.0 °F | 2.69 in. |
| March | 58.9 °F | 75.6 °F | 3.18 in. |
| April | 64.8 °F | 80.5 °F | 2.88 in. |
| May | 70.4 °F | 85.5 °F | 2.87 in. |
| June | 75.0 °F | 88.6 °F | 7.75 in. |
| July | 76.3 °F | 89.2 °F | 9.74 in. |
| August | 76.4 °F | 89.5 °F | 9.45 in. |
| September | 74.8 °F | 88.3 °F | 7.25 in. |
| October | 68.9 °F | 83.7 °F | 2.72 in. |
| November | 60.4 °F | 76.9 °F | 2.05 in. |
| December | 55.1 °F | 72.0 °F | 2.86 in. |
| Annual | 65.7 °F | 80.9 °F | 56.43 in. |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10a : 30°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 10a : 30°F to 25°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |