Long Beach, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 13.3 °C (low) to 22.4 °C (high). Annual precipitation averages 297.9 Millimeters. Long Beach is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.8 °C | 19.2 °C | 76.45 mm |
| February | 9.5 °C | 19.1 °C | 81.53 mm |
| March | 10.8 °C | 19.6 °C | 38.86 mm |
| April | 11.7 °C | 21.1 °C | 13.97 mm |
| May | 14 °C | 22 °C | 5.59 mm |
| June | 15.8 °C | 23.4 °C | 2.29 mm |
| July | 17.6 °C | 25.7 °C | 0.76 mm |
| August | 18 °C | 26.7 °C | 0.25 mm |
| September | 17.3 °C | 26.4 °C | 2.29 mm |
| October | 15.1 °C | 24.5 °C | 9.14 mm |
| November | 11.9 °C | 21.8 °C | 18.03 mm |
| December | 8.8 °C | 19.1 °C | 48.77 mm |
| Annual | 13.3 °C | 22.4 °C | 297.93 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 10b : 1.7°C to 4.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |