New Port Richey, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 64.7 °F (low) to 81 °F (high). Annual precipitation averages 56 Inches. New Port Richey is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 50.9 °F | 69.4 °F | 3.04 in. |
| February | 53.6 °F | 71.8 °F | 2.59 in. |
| March | 57.9 °F | 75.7 °F | 3.11 in. |
| April | 63.8 °F | 80.4 °F | 2.8 in. |
| May | 69.6 °F | 85.0 °F | 2.69 in. |
| June | 74.5 °F | 88.3 °F | 7.49 in. |
| July | 75.7 °F | 89.4 °F | 9.08 in. |
| August | 75.8 °F | 89.8 °F | 9.9 in. |
| September | 74.0 °F | 89.0 °F | 7.5 in. |
| October | 67.9 °F | 84.0 °F | 2.65 in. |
| November | 59.2 °F | 77.0 °F | 1.92 in. |
| December | 54.0 °F | 71.9 °F | 3.22 in. |
| Annual | 64.7 °F | 81 °F | 55.99 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : 30°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |