Cypress, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 12.9 °C (low) to 22.9 °C (high). Annual precipitation averages 307.9 Millimeters. Cypress is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.2 °C | 19.5 °C | 74.42 mm |
| February | 8.9 °C | 19.4 °C | 81.53 mm |
| March | 10.4 °C | 20 °C | 43.94 mm |
| April | 11.6 °C | 21.5 °C | 13.97 mm |
| May | 13.9 °C | 22.3 °C | 6.86 mm |
| June | 15.9 °C | 23.9 °C | 2.29 mm |
| July | 17.7 °C | 26.5 °C | 1.27 mm |
| August | 18.1 °C | 27.7 °C | 0.25 mm |
| September | 17.2 °C | 27.4 °C | 2.29 mm |
| October | 14.5 °C | 25.2 °C | 11.68 mm |
| November | 10.7 °C | 22.3 °C | 17.53 mm |
| December | 7.8 °C | 19.3 °C | 51.82 mm |
| Annual | 12.9 °C | 22.9 °C | 307.85 mm |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10a : -1.1°C to 1.7°C |
| Plant Hardiness Zone - 2012 | Zone 10b : 1.7°C to 4.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |