Leona Valley, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 10.4 °C (low) to 22.8 °C (high). Annual precipitation averages 355.9 Millimeters. 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 | 3.9 °C | 13.8 °C | 76.45 mm |
| February | 4.2 °C | 14.7 °C | 95.76 mm |
| March | 5.9 °C | 17.6 °C | 53.09 mm |
| April | 7.4 °C | 20 °C | 21.34 mm |
| May | 11 °C | 24.3 °C | 7.62 mm |
| June | 15.3 °C | 29.4 °C | 2.03 mm |
| July | 18.8 °C | 33.2 °C | 2.29 mm |
| August | 18.9 °C | 33.8 °C | 1.02 mm |
| September | 16.6 °C | 30.9 °C | 3.81 mm |
| October | 11.8 °C | 24.8 °C | 13.72 mm |
| November | 7.1 °C | 18.4 °C | 17.78 mm |
| December | 3.4 °C | 13.2 °C | 60.96 mm |
| Annual | 10.4 °C | 22.8 °C | 355.87 mm |
| 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 : -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 | Csa - Hot-Summer Mediterranean Climate |