San Clemente, California has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 53 °F (low) to 71.2 °F (high). Annual precipitation averages 13.3 Inches. San Clemente is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 46.5 °F | 66.7 °F | 2.6 in. |
| February | 46.5 °F | 66.4 °F | 3.23 in. |
| March | 47.5 °F | 67.5 °F | 1.99 in. |
| April | 49.4 °F | 67.4 °F | 0.88 in. |
| May | 53.8 °F | 69.0 °F | 0.34 in. |
| June | 57.6 °F | 71.8 °F | 0.16 in. |
| July | 61.0 °F | 77.0 °F | 0.08 in. |
| August | 61.5 °F | 78.2 °F | 0.03 in. |
| September | 60.0 °F | 77.8 °F | 0.12 in. |
| October | 55.7 °F | 74.7 °F | 0.59 in. |
| November | 50.2 °F | 71.3 °F | 1.01 in. |
| December | 46.1 °F | 66.1 °F | 2.26 in. |
| Annual | 53 °F | 71.2 °F | 13.29 in. |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10b : 35°F to 30°F |
| Plant Hardiness Zone - 2012 | Zone 10a : 30°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |