Port Hueneme, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 11.6 °C (low) to 20.1 °C (high). Annual precipitation averages 368.8 Millimeters. Port Hueneme is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.7 °C | 18.7 °C | 80.01 mm |
| February | 8.7 °C | 18.3 °C | 95.76 mm |
| March | 9.3 °C | 18.6 °C | 64.01 mm |
| April | 9.9 °C | 18.6 °C | 17.78 mm |
| May | 11.8 °C | 19.3 °C | 7.62 mm |
| June | 13.7 °C | 20.2 °C | 1.52 mm |
| July | 15.3 °C | 21.7 °C | 0.51 mm |
| August | 15.4 °C | 22 °C | 0 mm |
| September | 14.8 °C | 22.4 °C | 1.52 mm |
| October | 13.2 °C | 22 °C | 11.43 mm |
| November | 10.4 °C | 20.9 °C | 25.4 mm |
| December | 8.4 °C | 18.5 °C | 63.25 mm |
| Annual | 11.6 °C | 20.1 °C | 368.81 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10b : 1.7°C to 4.4°C |
| Plant Hardiness Zone - 2012 | Zone 10a : -1.1°C to 1.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |