Dunedin, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 18.7 °C (low) to 27.1 °C (high). Annual precipitation averages 1420.4 Millimeters. Dunedin is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.1 °C | 20.7 °C | 75.44 mm |
| February | 12.7 °C | 21.9 °C | 66.29 mm |
| March | 15.1 °C | 24 °C | 80.77 mm |
| April | 18.2 °C | 26.8 °C | 72.14 mm |
| May | 21.4 °C | 29.5 °C | 75.44 mm |
| June | 24 °C | 31.3 °C | 193.8 mm |
| July | 24.7 °C | 31.6 °C | 233.93 mm |
| August | 24.7 °C | 31.9 °C | 243.33 mm |
| September | 23.8 °C | 31.3 °C | 183.9 mm |
| October | 20.6 °C | 28.7 °C | 66.29 mm |
| November | 15.8 °C | 24.8 °C | 54.86 mm |
| December | 12.8 °C | 22.1 °C | 74.17 mm |
| Annual | 18.7 °C | 27.1 °C | 1420.36 mm |
| Average First Frost Date | Frost Rare |
| 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 |