Lucerne Valley, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 8.5 °C (low) to 26.2 °C (high). Annual precipitation averages 112.3 Millimeters. Lucerne Valley is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.1 °C | 15.6 °C | 19.05 mm |
| February | 1.2 °C | 17.1 °C | 19.56 mm |
| March | 4.2 °C | 20.4 °C | 13.97 mm |
| April | 7.1 °C | 24.3 °C | 4.83 mm |
| May | 11.2 °C | 29.3 °C | 1.78 mm |
| June | 15.4 °C | 35 °C | 0.76 mm |
| July | 18.9 °C | 38.2 °C | 12.95 mm |
| August | 18.2 °C | 37.6 °C | 6.1 mm |
| September | 14.8 °C | 33.7 °C | 3.81 mm |
| October | 8.8 °C | 27.5 °C | 6.1 mm |
| November | 2.8 °C | 20.2 °C | 7.62 mm |
| December | -0.3 °C | 14.9 °C | 15.75 mm |
| Annual | 8.5 °C | 26.2 °C | 112.28 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |