Mecca, California has a Hot Desert Climate climate (Köppen classification: BWh). Average annual temperatures range from 14.9 °C (low) to 30.5 °C (high). Annual precipitation averages 69.1 Millimeters. Mecca is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.9 °C | 20.8 °C | 16 mm |
| February | 7.8 °C | 22.7 °C | 11.94 mm |
| March | 11.1 °C | 26.2 °C | 7.37 mm |
| April | 13.8 °C | 29.6 °C | 1.52 mm |
| May | 17.8 °C | 33.3 °C | 0.76 mm |
| June | 21.1 °C | 38 °C | 0 mm |
| July | 25.2 °C | 40.3 °C | 2.54 mm |
| August | 25.3 °C | 40.3 °C | 2.29 mm |
| September | 21.5 °C | 37.8 °C | 5.84 mm |
| October | 15.9 °C | 32.1 °C | 6.35 mm |
| November | 8.9 °C | 25.3 °C | 4.32 mm |
| December | 5 °C | 20.1 °C | 10.16 mm |
| Annual | 14.9 °C | 30.5 °C | 69.09 mm |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BWh - Hot Desert Climate |