Sonora, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 7.9 °C (low) to 23 °C (high). Annual precipitation averages 858.3 Millimeters. Sonora is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.2 °C | 13.3 °C | 166.88 mm |
| February | 2.7 °C | 14.7 °C | 149.35 mm |
| March | 4.2 °C | 17.4 °C | 126.49 mm |
| April | 5.6 °C | 19.7 °C | 80.77 mm |
| May | 8.7 °C | 24.8 °C | 42.42 mm |
| June | 12.2 °C | 30.3 °C | 10.16 mm |
| July | 15.7 °C | 34.6 °C | 1.27 mm |
| August | 15.2 °C | 34.1 °C | 2.54 mm |
| September | 12.9 °C | 31.2 °C | 4.57 mm |
| October | 8.6 °C | 25 °C | 40.89 mm |
| November | 4.4 °C | 18.1 °C | 80.26 mm |
| December | 1.8 °C | 13.2 °C | 152.65 mm |
| Annual | 7.9 °C | 23 °C | 858.25 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |