San Lucas, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 7.1 °C (low) to 23.3 °C (high). Annual precipitation averages 313.7 Millimeters. San Lucas is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.4 °C | 16.9 °C | 72.14 mm |
| February | 4.3 °C | 17.7 °C | 70.61 mm |
| March | 5.2 °C | 19.8 °C | 51.56 mm |
| April | 5.9 °C | 22.1 °C | 19.05 mm |
| May | 8.1 °C | 25 °C | 7.11 mm |
| June | 9.7 °C | 27.8 °C | 1.52 mm |
| July | 11.7 °C | 29 °C | 0.51 mm |
| August | 11.7 °C | 29.3 °C | 0.25 mm |
| September | 10.4 °C | 28.8 °C | 1.02 mm |
| October | 7.4 °C | 25.8 °C | 14.99 mm |
| November | 5 °C | 20.7 °C | 25.15 mm |
| December | 2.9 °C | 16.4 °C | 49.78 mm |
| Annual | 7.1 °C | 23.3 °C | 313.69 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |