Ocotillo, California has a Cold Desert Climate climate (Köppen classification: BWk). Average annual temperatures range from 57.1 °F (low) to 88 °F (high). Annual precipitation averages 3.4 Inches. Ocotillo is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 42.6 °F | 69.9 °F | 0.63 in. |
| February | 45.5 °F | 72.1 °F | 0.55 in. |
| March | 50.1 °F | 77.3 °F | 0.25 in. |
| April | 54.1 °F | 85.5 °F | 0.05 in. |
| May | 59.9 °F | 94.1 °F | 0.12 in. |
| June | 66.3 °F | 104.0 °F | 0.06 in. |
| July | 73.8 °F | 106.6 °F | 0.32 in. |
| August | 75.0 °F | 107.9 °F | 0.2 in. |
| September | 69.8 °F | 101.3 °F | 0.17 in. |
| October | 59.1 °F | 90.3 °F | 0.16 in. |
| November | 48.4 °F | 78.0 °F | 0.2 in. |
| December | 41.1 °F | 68.4 °F | 0.64 in. |
| Annual | 57.1 °F | 88 °F | 3.35 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 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BWk - Cold Desert Climate |