Lucerne, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 42 °F (low) to 73.1 °F (high). Annual precipitation averages 33.1 Inches. Lucerne is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 34.2 °F | 55.4 °F | 6.62 in. |
| February | 35.2 °F | 59.1 °F | 6.39 in. |
| March | 36.9 °F | 63.4 °F | 4.1 in. |
| April | 39.7 °F | 68.8 °F | 2.33 in. |
| May | 44.1 °F | 76.7 °F | 1.37 in. |
| June | 48.5 °F | 85.4 °F | 0.27 in. |
| July | 53.3 °F | 93.6 °F | 0.03 in. |
| August | 51.9 °F | 92.7 °F | 0.08 in. |
| September | 47.5 °F | 88.0 °F | 0.13 in. |
| October | 42.2 °F | 77.0 °F | 1.55 in. |
| November | 37.0 °F | 62.5 °F | 3.22 in. |
| December | 33.2 °F | 55.0 °F | 6.98 in. |
| Annual | 42 °F | 73.1 °F | 33.07 in. |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |