Los Alamitos, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 55.4 °F (low) to 72.8 °F (high). Annual precipitation averages 11.8 Inches. Los Alamitos is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 46.9 °F | 66.8 °F | 2.86 in. |
| February | 48.3 °F | 66.5 °F | 3.12 in. |
| March | 50.8 °F | 67.7 °F | 1.68 in. |
| April | 52.9 °F | 70.3 °F | 0.54 in. |
| May | 57.1 °F | 71.5 °F | 0.25 in. |
| June | 60.6 °F | 74.3 °F | 0.08 in. |
| July | 63.9 °F | 79.1 °F | 0.05 in. |
| August | 64.5 °F | 81.3 °F | 0.01 in. |
| September | 63.0 °F | 80.9 °F | 0.09 in. |
| October | 58.3 °F | 76.9 °F | 0.48 in. |
| November | 51.5 °F | 71.7 °F | 0.67 in. |
| December | 46.4 °F | 66.5 °F | 2.0 in. |
| Annual | 55.4 °F | 72.8 °F | 11.83 in. |
| Average First Frost Date | No Frost |
| 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 10b : 35°F to 30°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |