Lake Isabella, California has a Hot Desert Climate climate (Köppen classification: BWh). Average annual temperatures range from 48.5 °F (low) to 76.1 °F (high). Annual precipitation averages 13.1 Inches. Lake Isabella is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.8 °F | 59.5 °F | 2.65 in. |
| February | 37.3 °F | 61.3 °F | 2.81 in. |
| March | 40.8 °F | 65.5 °F | 2.24 in. |
| April | 44.6 °F | 69.9 °F | 0.79 in. |
| May | 51.8 °F | 78.6 °F | 0.45 in. |
| June | 59.4 °F | 88.8 °F | 0.17 in. |
| July | 65.4 °F | 97.5 °F | 0.17 in. |
| August | 63.9 °F | 97.1 °F | 0.16 in. |
| September | 59.0 °F | 90.2 °F | 0.08 in. |
| October | 49.3 °F | 78.5 °F | 0.46 in. |
| November | 40.4 °F | 67.4 °F | 1.46 in. |
| December | 34.8 °F | 58.4 °F | 1.63 in. |
| Annual | 48.5 °F | 76.1 °F | 13.07 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 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 | Abnormally Dry |
| Köppen Climate Classification | BWh - Hot Desert Climate |