Winter Haven, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 17.3 °C (low) to 28.6 °C (high). Annual precipitation averages 1338.1 Millimeters. Winter Haven is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.7 °C | 22.2 °C | 69.85 mm |
| February | 11.4 °C | 24.1 °C | 57.91 mm |
| March | 13.4 °C | 26.2 °C | 75.18 mm |
| April | 16.4 °C | 28.8 °C | 71.12 mm |
| May | 19.5 °C | 31.3 °C | 89.15 mm |
| June | 22.2 °C | 32.7 °C | 207.01 mm |
| July | 23.2 °C | 33.1 °C | 199.39 mm |
| August | 23.2 °C | 33.2 °C | 198.88 mm |
| September | 22.4 °C | 32.2 °C | 180.59 mm |
| October | 19.3 °C | 29.6 °C | 76.96 mm |
| November | 14.6 °C | 26 °C | 44.45 mm |
| December | 11.7 °C | 23.5 °C | 67.56 mm |
| Annual | 17.3 °C | 28.6 °C | 1338.05 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : -1.1°C to 1.7°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |