New Port Richey, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 18.2 °C (low) to 27.2 °C (high). Annual precipitation averages 1422.2 Millimeters. New Port Richey is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 10.5 °C | 20.8 °C | 77.22 mm |
| February | 12 °C | 22.1 °C | 65.79 mm |
| March | 14.4 °C | 24.3 °C | 78.99 mm |
| April | 17.7 °C | 26.9 °C | 71.12 mm |
| May | 20.9 °C | 29.4 °C | 68.33 mm |
| June | 23.6 °C | 31.3 °C | 190.25 mm |
| July | 24.3 °C | 31.9 °C | 230.63 mm |
| August | 24.3 °C | 32.1 °C | 251.46 mm |
| September | 23.3 °C | 31.7 °C | 190.5 mm |
| October | 19.9 °C | 28.9 °C | 67.31 mm |
| November | 15.1 °C | 25 °C | 48.77 mm |
| December | 12.2 °C | 22.2 °C | 81.79 mm |
| Annual | 18.2 °C | 27.2 °C | 1422.16 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 | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |