Leona Valley, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 50.6 °F (low) to 73.1 °F (high). Annual precipitation averages 14 Inches. Leona Valley is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 39.1 °F | 56.9 °F | 3.01 in. |
| February | 39.6 °F | 58.5 °F | 3.77 in. |
| March | 42.6 °F | 63.7 °F | 2.09 in. |
| April | 45.3 °F | 68.0 °F | 0.84 in. |
| May | 51.8 °F | 75.7 °F | 0.3 in. |
| June | 59.5 °F | 85.0 °F | 0.08 in. |
| July | 65.8 °F | 91.8 °F | 0.09 in. |
| August | 66.1 °F | 92.9 °F | 0.04 in. |
| September | 61.9 °F | 87.6 °F | 0.15 in. |
| October | 53.2 °F | 76.6 °F | 0.54 in. |
| November | 44.7 °F | 65.1 °F | 0.7 in. |
| December | 38.1 °F | 55.8 °F | 2.4 in. |
| Annual | 50.6 °F | 73.1 °F | 14.01 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |