Port Richey, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 64.7 °F (low) to 80.4 °F (high). Annual precipitation averages 56.2 Inches. Port Richey is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 50.8 °F | 69.0 °F | 2.99 in. |
| February | 53.5 °F | 71.2 °F | 2.6 in. |
| March | 57.8 °F | 75.2 °F | 3.19 in. |
| April | 63.7 °F | 79.5 °F | 2.76 in. |
| May | 69.5 °F | 84.2 °F | 2.71 in. |
| June | 74.7 °F | 87.5 °F | 7.56 in. |
| July | 76.0 °F | 88.8 °F | 9.03 in. |
| August | 75.9 °F | 89.3 °F | 10.02 in. |
| September | 74.0 °F | 88.5 °F | 7.39 in. |
| October | 67.9 °F | 83.4 °F | 2.64 in. |
| November | 59.1 °F | 76.6 °F | 1.9 in. |
| December | 53.8 °F | 71.6 °F | 3.38 in. |
| Annual | 64.7 °F | 80.4 °F | 56.17 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| 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 |