Deltona, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 16.1 °C (low) to 27.9 °C (high). Annual precipitation averages 1390.9 Millimeters. Deltona is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.1 °C | 21.2 °C | 74.93 mm |
| February | 9.5 °C | 22.8 °C | 61.21 mm |
| March | 11.6 °C | 25.3 °C | 82.55 mm |
| April | 14.8 °C | 28.1 °C | 71.88 mm |
| May | 18.3 °C | 30.8 °C | 96.01 mm |
| June | 21.7 °C | 32.5 °C | 198.37 mm |
| July | 22.7 °C | 33.3 °C | 193.8 mm |
| August | 22.9 °C | 33.2 °C | 206.76 mm |
| September | 21.9 °C | 31.7 °C | 182.88 mm |
| October | 18.1 °C | 28.8 °C | 103.12 mm |
| November | 13.2 °C | 25.1 °C | 56.39 mm |
| December | 10.1 °C | 22.4 °C | 62.99 mm |
| Annual | 16.1 °C | 27.9 °C | 1390.89 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°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 |