Coronado, California has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 56.7 °F (low) to 69.5 °F (high). Annual precipitation averages 9.4 Inches. Coronado is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 48.9 °F | 65.9 °F | 1.9 in. |
| February | 49.8 °F | 65.2 °F | 2.31 in. |
| March | 52.2 °F | 65.7 °F | 1.42 in. |
| April | 54.6 °F | 66.8 °F | 0.63 in. |
| May | 58.3 °F | 68.5 °F | 0.18 in. |
| June | 61.1 °F | 69.8 °F | 0.05 in. |
| July | 64.4 °F | 73.1 °F | 0.05 in. |
| August | 65.6 °F | 75.2 °F | 0.02 in. |
| September | 64.3 °F | 75.2 °F | 0.09 in. |
| October | 59.3 °F | 73.0 °F | 0.35 in. |
| November | 53.4 °F | 70.3 °F | 0.73 in. |
| December | 48.0 °F | 65.4 °F | 1.62 in. |
| Annual | 56.7 °F | 69.5 °F | 9.35 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 10b : 35°F to 30°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |