Edison, California has a Hot Desert Climate climate (Köppen classification: BWh). Average annual temperatures range from 50.7 °F (low) to 77.6 °F (high). Annual precipitation averages 7.7 Inches. Edison is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Jan. 1 - Jan. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 38.3 °F | 58.2 °F | 1.45 in. |
| February | 40.5 °F | 63.6 °F | 1.51 in. |
| March | 44.5 °F | 69.2 °F | 1.34 in. |
| April | 47.5 °F | 75.0 °F | 0.64 in. |
| May | 54.2 °F | 82.5 °F | 0.28 in. |
| June | 60.4 °F | 91.1 °F | 0.05 in. |
| July | 66.8 °F | 97.3 °F | 0.02 in. |
| August | 65.1 °F | 96.4 °F | 0.0 in. |
| September | 60.2 °F | 91.5 °F | 0.05 in. |
| October | 51.1 °F | 81.2 °F | 0.31 in. |
| November | 42.3 °F | 67.0 °F | 0.7 in. |
| December | 37.1 °F | 58.4 °F | 1.34 in. |
| Annual | 50.7 °F | 77.6 °F | 7.69 in. |
| Average First Frost Date | Jan. 1 - Jan. 10 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BWh - Hot Desert Climate |