Carlsbad, California has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 53.4 °F (low) to 68.4 °F (high). Annual precipitation averages 10.9 Inches. Carlsbad is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 45.2 °F | 65.4 °F | 2.03 in. |
| February | 45.7 °F | 64.8 °F | 2.61 in. |
| March | 48.0 °F | 65.0 °F | 1.68 in. |
| April | 50.1 °F | 65.0 °F | 0.92 in. |
| May | 55.3 °F | 66.5 °F | 0.25 in. |
| June | 59.2 °F | 68.3 °F | 0.07 in. |
| July | 62.9 °F | 71.8 °F | 0.07 in. |
| August | 63.5 °F | 73.6 °F | 0.03 in. |
| September | 60.9 °F | 73.2 °F | 0.19 in. |
| October | 55.4 °F | 71.6 °F | 0.53 in. |
| November | 49.2 °F | 69.9 °F | 0.79 in. |
| December | 44.9 °F | 65.6 °F | 1.72 in. |
| Annual | 53.4 °F | 68.4 °F | 10.89 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 10a : 30°F to 25°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |