Lexington Hills, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 8.7 °C (low) to 21.2 °C (high). Annual precipitation averages 1059.2 Millimeters. Lexington Hills is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.4 °C | 14.3 °C | 229.36 mm |
| February | 5.9 °C | 15.3 °C | 233.68 mm |
| March | 6.5 °C | 17.4 °C | 140.46 mm |
| April | 7.3 °C | 18.8 °C | 69.34 mm |
| May | 8.9 °C | 21.9 °C | 27.43 mm |
| June | 10.6 °C | 25.8 °C | 5.08 mm |
| July | 12.6 °C | 28.9 °C | 0.25 mm |
| August | 12.4 °C | 29 °C | 0.76 mm |
| September | 12.3 °C | 27.8 °C | 3.3 mm |
| October | 10 °C | 23.3 °C | 41.66 mm |
| November | 7.3 °C | 17.9 °C | 92.2 mm |
| December | 5.3 °C | 14 °C | 215.65 mm |
| Annual | 8.7 °C | 21.2 °C | 1059.17 mm |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 10b : 1.7°C to 4.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |