Santa Ana, California has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 54.7 °F (low) to 75 °F (high). Annual precipitation averages 12.8 Inches. Santa Ana is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 46.5 °F | 67.6 °F | 2.93 in. |
| February | 47.5 °F | 67.5 °F | 3.23 in. |
| March | 50.0 °F | 68.8 °F | 1.83 in. |
| April | 52.1 °F | 72.9 °F | 0.66 in. |
| May | 56.5 °F | 74.6 °F | 0.29 in. |
| June | 60.0 °F | 77.6 °F | 0.08 in. |
| July | 63.4 °F | 82.3 °F | 0.05 in. |
| August | 64.0 °F | 84.6 °F | 0.01 in. |
| September | 62.4 °F | 84.0 °F | 0.12 in. |
| October | 57.6 °F | 79.8 °F | 0.53 in. |
| November | 50.7 °F | 72.7 °F | 0.78 in. |
| December | 45.9 °F | 67.2 °F | 2.26 in. |
| Annual | 54.7 °F | 75 °F | 12.77 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 |